Outboard Dies When Throttle Up

Knowing the symptoms of a defective throttle position sensor can help you quickly diagnose the problem and make needed corrections. We used two different Mercury Marine outboards, a 2. I switched the outboard off then restarted. Each 150hp engine repair manual covers every aspect of repair. As soon as the. The steering on the RAV4 is great—not too taut and not too loose. It cranks right up with no problem. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Boat Motor Repair Manuals - Since 1998, iboats is the most trusted water lifestyle online store for boat parts and accessories, boats for sale, and forums. I've had it "fixed" at 3 separate places It still isn't right. I forgot: Thermoid hose is (relatively) cheap @ $17. Just an idea!. Regardless of your boat's throttle setting, the presence of an air leak will greatly restrict its speed. A robust electrical system with a high-output alternator to keep batteries charged and fishing. An initial burst to full throttle brings the bow down quickly. YamahaOnlineParts. Johnson Outboard Parts Forum; 175 ocean runner fuel issue 08-06-2017, 08:02 PM. 2017 Suzuki 140 Throttle Up Problem 05-28-2020, 06:59 AM My 2017 Suzuki 140 starts right up, idles as usual, runs slow--out of no wake zone after launch, then when I throttle up it sputters and stalls out. i was able to drain 2 of the 3 carb bowls and it fired and we were able to putt back to landing a little faster than idle. started up and ran for about 30min. The bike hasnt been running to my knowledge for 4-5 months. When I got home with the muff's on I tried it again and it worked fine. Consult your dealer for assistance. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. Boat motor dies coming off throttle-gctid588941 08-20-2014, 01:41 PM As I'm bringing the throttle back pretty slowly when coming down to idle speed, the engine drops down low RPMs and dies. As I increase the throttle rpms increase as expected until the throttle is about 1/3 open, and then the engine stumbles like it is going to stall out but then kicks right back in runs fine. How to tune adjust force 1990 85 hp outboard motor is a 2011 johnson 85 hp and a 85hp have same size motor cover 2010 johnson 85 hp model 9gom 2008 suzuki 85 hp stalls in water what is the oil gas mixture for 2009 mercury 85 hp thunderbolt ignition what should the compression be on 1979 85 hp 4 cyld mercruiser where is the cooling passages on a. The completely reimagined Yamaha F25 Portable four stroke. At least newer ones do. MERCRUISER HORN WARNING SYSTEMS Page 6 / 10 90-898301003 JUNE 2007 All Serial Numbers 0M300000 and Above Models All Serial Numbers 0M300000 and Up 4. Participant. Boat is rated for a 175. Includes neutral warm up capability. I have a 2013 20 horse it cranks fine idles fine and will throttle up fine in neutral but when I put in gear and throttle up it cuts out and dies. Though you do not get auto control to full throttle, you do get very fine control in the normal trolling range. nissan 70hp outboard repair manual download. ben24 Mercury 2 stroke 150 outboard dies at full throttle. However, smaller and older models may need a little coaxing. 25 hp fourstroke remove bent propeller shaft 25 hp mercury repair guide for a1994 25 hp yamiha outboard boat motor repair manual for 1974 johnson seahorse 25 hp repair manuel for a 25 hp mercury 2014 4 stroke repairing a 25 hp evinrude when straight gas has been run through without oil replace prop lower seal on mercury mariner 25 hp lb 114 rod is stuck in up position on 1985 yamaha 25 hp. The serpentine tines till up to 10 inches into the soil, and the. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. When alcohol in the fuel is allowed to dry inside of the carb, a residue is left behind that can clog the jet. 1 multi port loading up at idle Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. ) Throttle Bore Service Step 6 - The crankcase ventilation system or PCV valve of an engine is used to scavenge vapors from inside the engine while running, if this system malfunctions erratic idle conditions may. The AIS controls the idle speed by letting air bypass the throttle plate. just bought a boat with a 40hp outboard, it start and runs fine, it goes at low speeds fine, but as soon as i get to about 3/4-full throttle it boggs down and looses power, almost cutting out. The bike hasnt been running to my knowledge for 4-5 months. Available NOW for shipping. Participant. Starting an older motor More modern engines with sophisticated fuel injection systems or automatic chokes tend to start easily. I have a ratty pontoon boat and 9. The mechanics replaced both (99 was the only year to have 2 of these I believe) throttle position sensors as the computer showed they were not in sync. An improper linkage ratio might result in a stumble or. Shop, read reviews, or ask questions about Outboard Motors at the official West Marine online store. about two weeks ago i was out fishing. As I continued to back off on the throttle, the engine stalled. Strange, since the mechanic actually took out chunks of plastic from the fuel line and said that MUST have been the issue - fuel restriction. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. Re: Boat stalls when trying to accelerate Back from the shop, took the boat out on the water, yesterday and the problem still exists - just the same as it was. The in-line four-cylinder designs and electronic fuel injection make these 115 HP outboard motors strong, nimble, compact and light weight. This INSTANT DOWNLOAD 150 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. in a minimum of 8. It has a semi-circular opening, with a semi-circular shutter that opens or closes to allow air to bypass the throttle plate. 2 MPI Bravo (ECM 555) Horn Output Possible Cause Corrective Action Engine Usage Available For Consumer. If I throttle up while starting its fine and as long as i am in gear it runs fine but when i come up into neutral the engin. The steering on the RAV4 is great—not too taut and not too loose. It might just be a partially blocked primary or secondary circuit on the carb, and if your lucky just the cleaner may cure it. Founded by Ole Evinrude in Milwaukee, Wisconsin in 1907, it was formerly owned by the publicly traded Outboard Marine Corporation (OMC) since 1935 but OMC filed for bankruptcy in 2000. Mercury 4 stroke flash. The 70th installment revs up Aug. From idle when i start to throttle up to get on plane, engine starts to stutter/sputter/stall at about 1600 rpms. It starts fine but when I throttle it down to put it in gear, the motor shuts off. Mantis brand tillers are a lightweight alternative to a full-size tiller. About the "automotive" fuel line (hose). Shop Evinrude, Honda, Mercury, Nissan, Suzuki, Tohatsu and Yamaha parts. Even though many of us have stated in the forum that you can run the engine at full throttle after five minutes, the official answer is to follow the procedure listed in the Engine Operation, Maintenance and Warranty Manual which usually states don't run at full throttle for the first 2 hours, then. While there is a wide range of units available, many of us cut our teeth at the lower end of the spectrum, first. RELATED VIDEOS & PLAYLISTS: Basic. The repair and symptom guide will help you better identify the part needed to be replaced and how. I cleaned the carbs, changed the spark plugs and gave it fresh gas. I can lift the warmup lever and it will hit high rpms with no problem, but when I try to run it full or even half speed while in gear it goes for about a count of 5 and then bogs down. It will restart fine but does the same again when put in gear. Includes hardware for two 3300/33control cables. A robust electrical system with a high-output alternator to keep batteries charged and fishing. Optional engine trim switch in handle. A robust electrical system with a high-output alternator to keep batteries charged and fishing. Mechanic said everything else checked out ok. While the other pictures of the carburetor are dirty, we refurbish them before we ship them out. Each 80hp engine repair manual covers every aspect of repair. A downloadable Suzuki boat motor repair manual, also termed Suzuki outboard online factory service manual (FSM) or Suzuki engine workshop manual, is a digitally transmitted handbook giving instructions on how to overhaul, service or restore the motor back to working order. I have one of the old type B&S engine with carburetor that hooks to the gas tank put a rebuild in carb. pinion gear back up shim different shapes; picture of water pump case in earl and late model df50; 2002 40 hp suzuki outboard full throttle messes up after hitting log; 2002 suzuki 40 hp drain gasket; 2002 suzuki 40 outboard power head gasket; 2003 df40t 04001f suzuki outboard idle adjustment; 2003 suzuki 40 four stroke mixture ratio. i prime the bulb, motor recranks on 1st turn, runs well for several mins at full throttle, then dies/loses power. issue: outboard motor (75hp mercury tracker -- 3 cylinder, 2 cycle) cranks, run well for several minutes at full throttle, then dies (or sometimes idles if i pull back the throttle when i hear the engine losing power). Plenty of fuel in the tank, and there is a new fuel/water separator. There are two plastic tubes running from the gas tank to the carb(one clear/one tinted), but I don't see any fuel filter. The sympton for this situation is the motor will idle ok but wont run at full throtle. It will idle fine below the START mark on the throttle, had it running at a nice low idle and all was well. When I started up the engine ran ok at idle and at full throttle (pulling against the dock lines). 2 Hesitation & Stumble. I have a 2000 70hp 2 Stroke Yamaha motor on the back of my boat and after launching the boat on Saturday, I noticed that by moving the throttle, it wouldn't rev the motor up. They are supposed to help eliminate the dead spot from idle to advance throttle. Consult your dealer for assistance. Before I used the boat last week the cranking battery was dead. Post May 29, 2013 #2 2013-05-29T12:10. I took it back to the shop and read the multimeter with them and we discovered that the switch box was producing 60v. I have one of the old type B&S engine with carburetor that hooks to the gas tank put a rebuild in carb. The digital instruction book contains a wealth of how-to guides. If I don't back off it will choke out and die. Boat is rated for a 175. While i was winterizing i removed the spark plugs and noticed 3 look the same and the 1. One symptom of a throttle body going bad is if the vehicle stalls at any time either when starting the engine or driving the vehicle. LFS Marine & Outdoor. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. If the boot that connects the airbox to the carb is not sealed correctly, would this cause the cut out? The throttle wire moves smoothly and springs back into position. loaded it does 5950rpm. Open up an outboard and this— hugely simplified —is what you'll find inside: Fuel burns in the cylinder (or cylinders) to make power. So I'm trying to figure out why my boat run so well for the first 45 minutes of operation and then if I turn off the boat to anchor somewhere restarting it is almost impossible unless if I don't let it sit for more than 30 minutes. This INSTANT DOWNLOAD 6 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. I have a 2000 70hp 2 Stroke Yamaha motor on the back of my boat and after launching the boat on Saturday, I noticed that by moving the throttle, it wouldn't rev the motor up. Dirty injectors Bad plugs / Coil / Leads / Coil pack Dirty fuel o2 Sensor Throttle position sensor If you are doing your own maintenance run the fuel down to 1/8 tank and. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. Though you do not get auto control to full throttle, you do get very fine control in the normal trolling range. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. The 2-cycle outboard motor has two idle adjustment screws on the top of the carburetor that can be adjusted with just a screwdriver and a vacuum gauge. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now!). 75 of The Top Retailers Can Be Found on eBay. if i leave it at 1600 rpms, its will fluctuate between 1600-2300 rpms. A robust electrical system with a high-output alternator to keep batteries charged and fishing. Optional engine trim switch in handle. My outboard bracket is from Boats and Blitz, and has an extension arm that puts it well aft of the rudder so the engine doesn’t eat it even when steering to port. My engine won’t rev above 2500 rpm, and drops to about 1200 when it revs back up to 2500 under a steady pedal/throttle. We are not affiliated with Mercury Marine and accept no advertising. First let the vehicle warm up and while sitting at idle slowly twist the throttle increasing the rpm's. if the carbs are clean or can be proven to be okay,you may have to adjust the linkages idle stop bolt to take up any slack from wear to set the idle where you need it,I would not mess with the cables housing length. The steering on the RAV4 is great—not too taut and not too loose. Then move the throttle control back 3/16" (4. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. Starts ok with choke and will idle ok, but when I go to twist throttle engine dies, also if left to idle it starts to pop through the 1&2 exhaust @ Posted by steven munn on Mar 06, 2013. OMC (Outboard Motor Corporation) was the leader in outboard manufacturing for several decades but lost traction in the 80's and 90's, and were eventually bought out in the early 2000's by BRP. 9/15hp motor was slow to rev up, and would change rev's with no movement of the throttle grip. 9 outboard what is the factory size propeller; 2007 9. While the other pictures of the carburetor are dirty, we refurbish them before we ship them out. If the boot that connects the airbox to the carb is not sealed correctly, would this cause the cut out? The throttle wire moves smoothly and springs back into position. * Also, if your TPS doesn't reach 5 volts, or close to it (up to 3. im haveing a problem with my honda 9. If you have multiple throttle codes, it will almost always mean an electronic throttle body replacement along with the throttle position sensor. And when it idles the outboard shakes. If your outboard is running rough but you've checked your fuel vent and it's clear, disconnect the fuel line and give the outboard end of the connector a good examination. Engine Throttle Control Sensor - Fault 183 : We are a group of Verado owners from all over the world that encourage the free exchange of information about the Verado engine. and it goes into gear but no power just hits hard idle at full throttle. However, when I am in the water and the engine is under load it stalls. And if you ever can't get one start, check out our 25 reasons why your boat engine won't start. If Guardian System has been activated, reduce throttle speed. im am out of ideas and need help. Engine Throttle Control Sensor - Fault 183 We are a group of Verado owners from all over the world that encourage the free exchange of information about the Verado engine. Normal starting routine - prime, choke, pull about 3 times til it fires a little, then push choke off, pull a few more times till it starts. I went out Saturday and when I left the boat ramp, boat was running fine. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. An improper linkage ratio might result in a stumble or. how to change oil in 2008 susuki 70hp 4 sroke. I figured maybe this would cause a. Pick-Up is available at our location in Salt Lake City. You should now be able to select forward or reverse without stalling and get back up and Mercury outboard running rough - Final fix and engine runs - Troubleshooting Part 3 Mercury Outboard Idles Rough and Stalls - Duration: 5:31. The Typhoon was designed originally as an air superiority fighter and is manufactured by a consortium of Airbus, BAE Systems and Leonardo that conducts the majority of the project through a joint holding company, Eurofighter Jagdflugzeug GmbH. net takes all the frustration out of maintenance and repairs by carrying all the OEM Yamaha outboard parts for your 1990 Yamaha outboard engine. 5 hp, shown below was built from 1964 to 1973, which was a the first of the low profile motor series, and is not a sleek looking motor in my opinion, with a squatty oversized motor cover and upper housing sitting on a standard lower unit. 9 HP: 2001 & Newer ning the throttle actuator. As soon as the. SOURCE: 1993 olds cutlass supreme 3. A robust electrical system with a high-output alternator to keep batteries charged and fishing. It will cruise all day at 1/2 throttle but it shuts off about 75% of the time when I try to move it from 1/2 throttle to full throttle. The throttle position sensor (TPS) is part of your vehicle's fuel management system, and helps ensure that the correct mixture of air and fuel is delivered to your engine. Re: Help with Tractor (dies when put in gear) « Reply #8 on: July 13, 2007, 12:21:23 PM » Is it dying because of load or becuase it's in gear and there is some sort of interlock that isn't getting set (safety) May be more than a simple seat switch. I am trying to decide between the Honda BF2D 2. You can run em without the metal. When the outboard motor fails to start, verify all of the following: Gas in the tank. Founded by Ole Evinrude in Milwaukee, Wisconsin in 1907, it was formerly owned by the publicly traded Outboard Marine Corporation (OMC) since 1935 but OMC filed for bankruptcy in 2000. After running the motor for just a couple of minutes at low RPM, when I give it more throttle, it bogs down and dies. Find Briggs & Stratton Control Cable Parts at RepairClinic. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. about dark we cranked up to head to the landing. Boat Motor Repair Manuals - Since 1998, iboats is the most trusted water lifestyle online store for boat parts and accessories, boats for sale, and forums. SMARTCRAFT PRODUCT. 5 to 350 horsepower for more than 75 years, though the company's first motors did not have as much horsepower as some of its current motors. Yamaha Outboard 115HP 115 HP Service Manual 1996-2006. Here are some: Stalls at idle, stalls when I put the clutch in, stalls when I turn a corner, misfires, surges, no power, cuts out, no power at top revs, runs rough, etc. You should now be able to select forward or reverse without stalling and get back up and Mercury outboard running rough - Final fix and engine runs - Troubleshooting Part 3 Mercury Outboard Idles Rough and Stalls - Duration: 5:31. The engine dies when increase throttle. Make sure the exhaust port is clear from carbon deposits (although it takes a lot of running time for them to build up at the exhaust port), and make sure the muffler is clear. Most problems with these units are from gum or varnish build-up to the point of not allowing fuel to flow during one or more of the circuits or adjustments to supply sufficient gas to keep the mixture correct and the engine running. The wiring harness running behind the Exhaust Gas Recirculation tube chaffs through the harness wiring and causes a multitude of goofy sensor and code problems. I will start at the beginning. The buildup of salt in your outboard can cause blockages that result in overheating and eventual corrosion. Download a Suzuki outboard repair manual instantly. Other uses can result in injury to the operator or damage to the outboard motor and other property. Also, the problem seems to be related to engine temperature, the engine will act up for 10-15min and seems to work/function normally when it's at proper warm-up temp. The problem is getting worse as you say in your post. If this is the problem the only fix is to take the head off and remove the metal. Once it dies from WOT I can tell there is no spark, as if an over-temp condition exists, but It's not even warmed up. This is not a standard 25 hp Johnson Outboard, it is a 3 cylinder oil injected model. Pick-Up is available at our location in Salt Lake City. The Shift cable is the gear cable that runs from the alpha leg through the gimble housing and terminates on a shift interrupt switch bracket, usually mounted somewhere on the engine (rocker cover or exhaust riser). While the other pictures of the carburetor are dirty, we refurbish them before we ship them out. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. It starts and runs. The alarm stays on until the motor is back at idle. SOURCE: 1993 olds cutlass supreme 3. 2017 Suzuki 140 Throttle Up Problem 05-28-2020, 06:59 AM My 2017 Suzuki 140 starts right up, idles as usual, runs slow--out of no wake zone after launch, then when I throttle up it sputters and stalls out. My '79 Evinrude 70 hp outboard dies when I stick it into gear and try to put power to it. Throttle Position (P0120 or P0124) or (P0222 or P0229) An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. This is probably one of the most common problems that you can have, if you know you have good fuel. it fires up ok but as soon as i push the throttle above a quarter of the way forward or back it looses revs and stalls. I just changed my plugs yesterday, since my boat was running a bit rough lately, making sure I gapped them correctly this time too, since last time I didn't actually know what they were suppose to be gapped at, ask a boat dealer, they can tell you, and. Although there may be other reasons for the check engine light to come on, this could be another symptom of a bad throttle body. Hitting the choke can actually keep it from stalling but she will stall if left alone and has no power. After running the motor for just a couple of minutes at low RPM, when I give it more throttle, it bogs down and dies. At idle it runs smooth, try to run in mid range good luc. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. It's an old B16A3 in an '95 manual transmission Honda del Sol. To maintain an outboard motor, flush out the engine after every use, and check to make sure the water flow exiting the motor has a strong output. Things that have been suggested from bar stool Merc techs: fuel filter, fuel pump, fuel line/primer ball. The repair and symptom guide will help you better identify the part needed to be replaced and how. 9 outboard on my boat. An improper linkage ratio might result in a stumble or. FIRST 2 HOURS For first 15 minutes, operate the engine in-gear at idling speed. Yamaha F25 Four-stroke Outboard Review. I just changed my plugs yesterday, since my boat was running a bit rough lately, making sure I gapped them correctly this time too, since last time I didn't actually know what they were suppose to be gapped at, ask a boat dealer, they can tell you, and. Increased fuel economy and outstanding overall performance. from Cape Charles, VA. Once it dies from WOT I can tell there is no spark, as if an over-temp condition exists, but It's not even warmed up. just bought a boat with a 40hp outboard, it start and runs fine, it goes at low speeds fine, but as soon as i get to about 3/4-full throttle it boggs down and looses power, almost cutting out. 5V on some models), when the throttle plate is fully opened, replace the TPS. As soon as you let off the the throttle and tries to go again, then it dies. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. 6HP Outboard Motor (20) 3. Yamaha Outboard 115HP 115 HP Service Manual 1996-2006. Changed the in-line filter. Each 150hp engine repair manual covers every aspect of repair. At least newer ones do. The throttle valves are fully open when the throttle cam roller 8 is within the range b shown in the illustration. Be sure the outboard motor is properly mounted on the boat. Intermittent throttle control. the turning arc and UP/DOWN trim/tilt settings of the engine(s). rammed the thro. Outboard throttle adjustment| Off-Topic Discussion. Suitable for any type of boats with outboard, inboard or I/O power plants. Engines in older cars and other gas-powered vehicles also had a carburetor before the introduction of fuel. Throttle valve sensor assembly; 86 DT40 weak spark in 1 cylinder; DT140 oil pump connections; Head gasket question on 115hp Suzuki; DF90 problems; Need Manual for 89 Suzuki 115 HP outboard; Reducing power from 50 to 25 HP on Suzuki Outboard Engines? Strange growl at certain bandwidth range; DF200 stalling on cold start up; 1992 DT85 Suzuki. There are plenty of good reasons these outboards rule the water. loaded it does 5950rpm. This problem occurs about 75% of the time I attempt to power up, when it gets past it (the other 25% of the time) it runs fine. If it idles fast, step on the throttle and slip your toe off the pedal to let it snap up quickly. Positive shift detents and neutral lock out. im am out of ideas and need help. 2002 40 hp mercury outboard full throttle messes up after hitting log; 2002 mercury 40 hp drain gasket; 2004 40 hp yamaha want idle; 2004 mercury 40 hp four stroke bottom end removal; 2004 yamaha 40 hp 2 stroke carb sync; 2005 merc 40 hp fouling plugs; 2014 suzuki 40 hp outboard stalls in neutral; 1958 40 hp 2 stroke yamaha idle rpm; 1959 40 hp. As I understand it, Yamaha carbs have very tiny openings and any debris can mess them up. Yamaha Outboard engine stalls 4. My outboard motor dies at full throttle - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website. (about 15 minutes 3/4 throttle). The horn will turn off when throttle speed is within the allowable limit. The choke is controlled by a single lever control mounted on the tank. I just bought it brand new last year and it has less than 15 hours on it. I am looking for someone honest that is familiar with 90's Mariner outboards that wants to make some extra money. Mystery Mercury lightning 2. 9hp suzuki outboard manual. 9 hp Mariner outboard. Replaced plugs,new carb,and fuel filter. Suzuki 30hp 4 stroke maintenance suzuki 30hp 4 stroke service suzuki 30hp korjausopas suzuki 30hp manual suzuki 30hp outboard stalls on low speed suzuki 30hp outboard workshop manual throttle and timming linkage on johnston 30hp outboard wiring diagram for 30hp yamaha precesion blend oil pump yamaha 30hp 2 stroke outboard cylinfer head removal yamaha 30hp outboard manual free download yamaha. The in-line four-cylinder designs and electronic fuel injection make these 115 HP outboard motors strong, nimble, compact and light weight. If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. Start with no-worry reliability. ben24 Mercury 2 stroke 150 outboard dies at full throttle. The first thing to do would be to replace the pilot jet, or at least clean it. the problem with adjusting the star wheel is that is how you rig the throttle cable for idle and wide open throttle,if you adjust it too far,you can actually put unneeded stress on the throttle shafts at wide open. If the engine in emitting black smoke, this could mean that the air filter is dirty, the fuel could have gone bad, and/or the carburetor is flooded. The outboard is for a Mercury 340 inflatable with air deck, LOA. When I started up the engine ran ok at idle and at full throttle (pulling against the dock lines). A little TLC and preventive boat motor maintenance will help with safe boating and keep your motor running well for years to come. Insert the control cable bowden wire in the proper hole of the engine control lever, which is located on the side of the carburetor air intake elbow. 2 Year Replacement Warranty! Replace your carburetor if your machine starts up on choke then dies, if it starts with starting fluid then dies or if it needs choke on to run. Please note I take no responsibility if you burn your engine out. Starts ok with choke and will idle ok, but when I go to twist throttle engine dies, also if left to idle it starts to pop through the 1&2 exhaust @ Posted by steven munn on Mar 06, 2013. Quick fix for outboard throttle bogging down 2003 Yamaha 90 HP Outboard Won't Rev-up passed 2,500 RPM! WHY A 2 CYCLE ENGINE IDLES, BUT WONT REV UP? HAS NO POWER ? DIES? THEN YOU MUST WATCH. loaded it does 5950rpm. It's an old B16A3 in an '95 manual transmission Honda del Sol. , 1987 Bayliner Capri 2152 cuddy. I think the 8 pitch sacrafices some top speed as she is likely only doing about 25mph. Held to a Higher Standard. Free shipping. Initially I can rev it a little in gear and it seems like it runs fine. Genuine Nissan Outboard Service Manuals for Two-Stroke, Four-Stroke, and TLDI outboard motors. The manual throttle will still operate to full throttle, and if you use. This INSTANT DOWNLOAD 135 horsepower Mercury, Mariner, Yamaha, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. Other uses can result in injury to the operator or damage to the outboard motor and other property. Once I turned the motor off, I also had some difficulty starting it. sometimes it eventually picks up and speeds up, sometimes it just bogs and wot do anything. Product #079-8526-6. throttle position occasionally. Occassionally, it will bog down and I have to back off. * Also, if your TPS doesn't reach 5 volts, or close to it (up to 3. As I continued to back off on the throttle, the engine stalled. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. NOTE: The throttle may be briefly opened beyond the recommended setting to plane the boat, but must be reduced to. It does it no matter if warmed up or not. The first thing to do would be to replace the pilot jet, or at least clean it. At idle it runs smooth, try to run in mid range good luc. The 2-cycle outboard motor has two idle adjustment screws on the top of the carburetor that can be adjusted with just a screwdriver and a vacuum gauge. It engages the lower unit fine and makes the bo. This INSTANT DOWNLOAD 8 horsepower Mercury, Mariner, Yamaha, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. The outboard ignition system works in a similar way that is why even the ignition switch cannot be a normal automotive type but a magneto type switch. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. This time I'd say I was on full throttle ~5-10 seconds while stationary. I managed to get it moving, but it hit 10-12 MPH on mostly flat land (where 27 MPH was common). Enhanced fuel injection (EFI models) for boosted efficiency. I had my boat de-winterized, oil, filters and impleller changed last month, took it out twice this year and it ran fine. The Honda BF40 and BF50 are 4-stroke marine engines. This happens at less than 3000 rpms. Otherwise, I can wait a half hour or more, and it will start again cold. Shop with confidence - get free shipping to home or stores + price match guarantee!. When the throttle level is pushed forward, it opens the engine throttle in the outboard, which means that more air and fuel. any ideas?. The alarm stays on until the motor is back at idle. im haveing a problem with my honda 9. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. Suzuki 30hp 4 stroke maintenance suzuki 30hp 4 stroke service suzuki 30hp korjausopas suzuki 30hp manual suzuki 30hp outboard stalls on low speed suzuki 30hp outboard workshop manual throttle and timming linkage on johnston 30hp outboard wiring diagram for 30hp yamaha precesion blend oil pump yamaha 30hp 2 stroke outboard cylinfer head removal yamaha 30hp outboard manual free download yamaha. It cranks right up with no problem. When I started it. I noticed the motor went down by itself and I could not tilt the motor up. DOWNLOAD 90HP Outboard Repair Manual Sunday, December 29, 2013. Hide thumbs 10 hours To safely realize the full potential of 50% to 80% of maximum throttle this outboard motor, you need a opening. tilt After tilting up the outboard motor, be operation sure to support it with the tilt stop lever. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. What I've fixed: -Didn't pump water well -Stuck carb (stuck open, drained a couple has tanks) -Totally 100% cleaned the carb (which had recently been replaced, per paperwork I got with the engine) -replaced head. You can run em without the metal. Do not remove the engine cover while the engine is running. How to adjust Johnson outboard that stalls at idle only when in gear. If you pin the throttle it jumps to 3200 and then strugles to 3600 and then a rocket ship. Intermittent throttle control. For more than 30 years, Yamaha Outboards have delivered far more than superior power, performance and efficiency. The manual throttle will still operate to full throttle, and if you use. 9 outboard on my boat. Held to a Higher Standard. FEATURES • Enables easy and safe shifting by preventing accidental gear engagement unless engine is idling • Made of chrome plated marine aluminum • Pull-out handle disengages shift for warm-up. I assume its due fo. Most problems with these units are from gum or varnish build-up to the point of not allowing fuel to flow during one or more of the circuits or adjustments to supply sufficient gas to keep the mixture correct and the engine running. When I started up the engine ran ok at idle and at full throttle (pulling against the dock lines). The engine model is 130292 type 3016-01. I will go over how to adjust the gears so that shifting is the same for forward and rear. 1991 yamaha 15 hp 2 stroke outboard carb issues 1992 johnson outboard 15 hp reviews 1993 mercury 15 hp compression values 1994 mercury 15 hp outboard stumbles on throttle up 1995 yamaha 15 hp 4 stroke no power full throttle vidio of carb for repair 1996 yamaha 15 hp two stroke leg remove 199715 hp yamaha 4 stroke throttle sync adjustment 1998. evinrude 25 hp motor starts up then dies. The chainsaw is pretty new, a Poulan 16". Sometimes takes a few mins to start other times starts right up. And when it idles the outboard shakes. Normal starting routine - prime, choke, pull about 3 times til it fires a little, then push choke off, pull a few more times till it starts. Like the title says, 1999 50 HP Merc 2-stroke losing power at wide open throttle. A robust electrical system with a high-output alternator to keep batteries charged and fishing. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. Enjoy great priced products with fast shipping. 0L OMC Cobra (1998 GM/Mercruiser 3. Product Details Specifications Reviews Questions. my 1995 70hp johnson outboard wont idle and dies when i put in gear. They are supposed to help eliminate the dead spot from idle to advance throttle. but did not help it will start back up then dies,also there is gas coming out where the diphragm is any help. Ok I'm pretty good with little motors, but I am pulling my hair out now. Bellingham Retail Location:. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. This always reminds me of growing up when we had small engines mounted on go carts or lawn mowers consisting of a metal bar to short the spark plug lead. While its streamlined design is up to 25 percent lighter, it still manages to pack in exciting new features—like battery-less EFI and an optional electric start kit. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. It stalls on throttle up. DOWNLOAD 25HP Outboard Repair Manuals Saturday, December 28, 2013. However, when I am in the water and the engine is under load it stalls. This problem occurs about 75% of the time I attempt to power up, when it gets past it (the other 25% of the time) it runs fine. When the outboard motor fails to start, verify all of the following: Gas in the tank. The throttle control is a lever that can be pressed forward to increase the speed of the boat. NOTE: The throttle may be briefly opened beyond the recommended setting to plane the boat, but must be reduced to. The engine model is 130292 type 3016-01. A malfunctioning throttle position sensor will relay bad data to your car's computer and usually result in poor fuel economy. It might just be a partially blocked primary or secondary circuit on the carb, and if your lucky just the cleaner may cure it. In any case it's always worth consulting the motor's operating manual - these are often available even for older engines that have been out for production for 30 years. Tohatsu outboard problems. If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. It starts fine but when I throttle it down to put it in gear, the motor shuts off. However, after a few minutes, it stalls when I give it some gas. I noticed air in the oil line so I thought maybe oil wasn't getting to the cylinders. The AIS controls the idle speed by letting air bypass the throttle plate. after 1 mile or so, then more frequently after that. Original review: Oct. Re: 2004 Johnson/Suzuki 140 Stalls mid throttle Post Aug 20, 2013 #8 2013-08-20T16:57 Running it on a small 6 gallon tank should give you a good indication of where your problem lies. 0 Merc with Carb. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. then started dieing out like it was starving for gas tried to adjust carb. Mercury outboard won't start after warmed up. Enhanced fuel injection (EFI models) for boosted efficiency. it was running fine up until the last outing on saturday,just leaving the harbour and opened the throttle up and the engine started to pop. We used two different Mercury Marine outboards, a 2. Engine stalls when giving gas The typical two stroke outboard carb has two systems so to speak. 2000 50Hp Yamaha 2-Stroke Problems but within 400yds it died again. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. As you press down on the pedal, the throttle position sensor receives a signal relative to where your foot is, ranging from all the way up (zero acceleration) to all the way down (full acceleration). Find great deals on eBay for suzuki outboard motor. Whether performing basic maintenance or complete engine overhaul, this downloadable repair manual covers it all. Last year, the boat started to pop and or stumble above 2,600 r. Each 150hp engine repair manual covers every aspect of repair. Before operating a Honda outboard motor, read and understand the owner's manual and warranty policy. Hey guys, questions for you outboard wizards regarding low pressure fuel pumps Here's the situation: ran down to the rockpile yesterday (1 YT in boat, 1 released ), boat ran great on the way down. 2 Turbo I engine with a 3000 RPM idle problem. my 1995 70hp johnson outboard wont idle and dies when i put in gear. I figured maybe this would cause a. This is not a standard 25 hp Johnson Outboard, it is a 3 cylinder oil injected model. Examine fuel filter for clogs, and fuel line for kinks or leaks. It runs fine at low rpm but if you turn the throttle up past 1/4 it stalls out. Shop with confidence - get free shipping to home or stores + price match guarantee!. The number I came up with was 825667T, which superceded 825667. Outboards start like a car; just tilt them down and turn the key. The in-line four-cylinder designs and electronic fuel injection make these 115 HP outboard motors strong, nimble, compact and light weight. Shop Evinrude, Honda, Mercury, Nissan, Suzuki, Tohatsu and Yamaha parts. Sometimes it will run at full speed for a few minutes and sometimes it will only run for 10 seconds at 1/2 throttle. Consult your dealer for assistance. SUZUKI DF6, 6HP 4-Stroke Outboard Motor Suzuki 140hp 2003-2009 FourStroke Outboard …, Who Makes The Suzuki Df6 Outboard Manual Product information suzuki marine, suzuki df25 / df4 / df6 suzuki 4 stroke portables easy to carry • easy to use suzuki. What I've fixed: -Didn't pump water well -Stuck carb (stuck open, drained a couple has tanks) -Totally 100% cleaned the carb (which had recently been replaced, per paperwork I got with the engine) -replaced head. Wound up having all 3 carbs rebuilt and now it runs like a scalded dog. When the outboard motor fails to start, verify all of the following: Gas in the tank. The problem is getting worse as you say in your post. Got my outboard motor serviced the other day. from the top. Founded by Ole Evinrude in Milwaukee, Wisconsin in 1907, it was formerly owned by the publicly traded Outboard Marine Corporation (OMC) since 1935 but OMC filed for bankruptcy in 2000. 2004 johnson 300 cranks wont start. This sensor relays the information to the car's main computer — giving it constant updates as to the position of the throttle. The outboard is for a Mercury 340 inflatable with air deck, LOA. Even though many of us have stated in the forum that you can run the engine at full throttle after five minutes, the official answer is to follow the procedure listed in the Engine Operation, Maintenance and Warranty Manual which usually states don't run at full throttle for the first 2 hours, then. When alcohol in the fuel is allowed to dry inside of the carb, a residue is left behind that can clog the jet. THIS MODEL IS SPECIAL ORDER ONLY, PLEASE CALL FOR DETAILS AT 1-800-630-1233. 9 outboard; 2006 suzuki 9. It has a semi-circular opening, with a semi-circular shutter that opens or closes to allow air to bypass the throttle plate. Once up I am able to back off to nearly a quarter throttle and keep her on plane. 5 mph trolling speed and it runs a little rough while trolling and if i go any slower it will stall and while trolling i have to hit the choke every 15min or it will sta. I think what he means is that when you rev it up with the choke out the engine gets too little air and dies. 9 hp ($2,239), both four-strokes. Engine stalls when giving gas The typical two stroke outboard carb has two systems so to speak. Dirty injectors Bad plugs / Coil / Leads / Coil pack Dirty fuel o2 Sensor Throttle position sensor If you are doing your own maintenance run the fuel down to 1/8 tank and. It stalls on throttle up. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. any ideas?. [The Evinrude 90-HP outboard] starts and runs great but under load she bogs and stalls. so i put my backup plugs in and it fired right up and ran good. within 100yds i dropped of plane and it stalled it cranked but would immediately die. Honda BF40A and BF50A outboard motors are designed for use with boats that have a suitable manufacturer's power recommendation. From idle when i start to throttle up to get on plane, engine starts to stutter/sputter/stall at about 1600 rpms. Two things can be happening, One: the fuel line is leaking air some place. I cleaned the carbs, changed the spark plugs and gave it fresh gas. 20 reviews. Initially I can rev it a little in gear and it seems like it runs fine. I took it back to the shop and read the multimeter with them and we discovered that the switch box was producing 60v. A Mercury SmartCraft System instrument package can be purchased for this outboard. How to Adjust the Throttle Cable on a Mantis Tiller. Enjoy great priced products with fast shipping. Mar 20, · Download a 70HP Yamaha, Suzuki, Evinrude, Mariner, Johnson, Mercury outboard repair manual in seconds. Suitable for any type of boats with outboard, inboard or I/O power plants. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Honda bf50d Owner's Manual. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. You’re here to wake up the water. I prefer to sit on the starboard side of any engine with a twist throttle as it just feels right to twist it anti-clockwise to throttle up by dropping my wrist, so that’s why I. I noticed air in the oil line so I thought maybe oil wasn't getting to the cylinders. Quick fix for outboard throttle bogging down 2003 Yamaha 90 HP Outboard Won't Rev-up passed 2,500 RPM! WHY A 2 CYCLE ENGINE IDLES, BUT WONT REV UP? HAS NO POWER ? DIES? THEN YOU MUST WATCH. LFS Marine & Outdoor. The 70th installment revs up Aug. After running the motor for just a couple of minutes at low RPM, when I give it more throttle, it bogs down and dies. During certain loads, pressures, throttle chopping, or backfiring, it has been known to blow a hole right in the tube! As soon as a hole gets in this though, the engine will basically suck in so much air that it will rev straight up, to almost wide open throttle! Again, a quick fix. 00 for 25 feet (with free shipping). Initially I can rev it a little in gear and it seems like it runs fine. It runs fine at low rpm but if you turn the throttle up past 1/4 it stalls out. 1998 Cummins M11-450e Engine 70,936 Miles - $9,000. Hi guys hope you can help. 9 HP: 2001 & Newer ning the throttle actuator. This happens at less than 3000 rpms. The current issue is that the motor will not start unless I put the boat in neutral and turn the throttle up when starting the boat. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can't see inside it. This time I'd say I was on full throttle ~5-10 seconds while stationary. Bellingham, WA 98225. It's an old B16A3 in an '95 manual transmission Honda del Sol. This sounds like a classic case of a spun propeller hub. How to Adjust the Throttle Cable on a Mantis Tiller. Warranty : $2,086. Positive shift detents and neutral lock out. I can fish a 12 hour tourn and everytime I take off it runs rough. 2012 at 11:42 AM about the 1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Follow any one of the lines up to the throttle. Though you do not get auto control to full throttle, you do get very fine control in the normal trolling range. Starting an older motor More modern engines with sophisticated fuel injection systems or automatic chokes tend to start easily. This is a discussion on 25 hp Yamaha Outboard 4-stroke within the Small Engines forums, part of the Tech Support Forum category. There are plenty of good reasons these outboards rule the water. Universal Outboard Side Mount Control W/O Trim Switch Single lever, dual action for throttle and shift. Follow our repair guide to help you pick the appropriate part to replace to fix this problem. When I punch the throttle from idle to full, the motor hesitates before it aprings to life. 1987 Kawasaki GPz 1000 RX dies with throttle Starts ok with choke and will idle ok, but when I go to twist throttle engine dies, also if left to idle it starts to pop through the 1&2 exhaust @. so i put my backup plugs in and it fired right up and ran good. Re: Boat is running slow at full throttle I've been chasing basically the same problem on my 1990 60 Johnson (basically the 3 cylinder version of your engine) for months now. Tohatsu outboard problems. 9 hp ($2,239), both four-strokes. 2000 suzuki 40 hp 4 stroke outboard stalls when placed in gear 2002 40 hp suzuki outboard full throttle messes up after hitting log 2004 suzuki df 40 outboard. While the other pictures of the carburetor are dirty, we refurbish them before we ship them out. Whether performing basic maintenance or complete engine overhaul, this downloadable repair manual covers it all. Each 8hp engine repair manual covers every aspect of repair. DOWNLOAD 70 horsepower Repair Manual Johnson Evinrude Mercury Suzuki Yamaha 73. 9hp motor bored out to a 15hp. Other uses can result in injury to the operator or damage to the outboard motor and other property. Shop Evinrude, Honda, Mercury, Nissan, Suzuki, Tohatsu and Yamaha parts. Just an idea!. OUTBOARD MOTOR SAFETY IMPORTANT SAFETY INFORMATION Honda BF115D/BF135A and BF150A outboard motors are designed for use with boats that have a suitable manufacturer's power recommendation. After getting her out of break in things are a ton better. 19-03-2015, 15:30. Running out of ideas. rammed the thro. 9 outboard what is the factory size propeller; 2007 9. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. 5M 4-stroke outboard. The boat would not even plane. Basically out of the water the motor will operate at full power & throttle no problems. Mechanic said everything else checked out ok. 9/15hp motor was slow to rev up, and would change rev's with no movement of the throttle grip. The Honda BF40 and BF50 are 4-stroke marine engines. With Mercury Marine’s Digital Throttle and Shift (DTS), for example, a press of a button on the control box lets you use a single lever for shift and throttle of up to four outboards. Universal Outboard Side Mount Control W/O Trim Switch Single lever, dual action for throttle and shift. Water pump helpswater to move into the cooling system of the motor and thereby, the watercirculates into the power head and. Ok I'm pretty good with little motors, but I am pulling my hair out now. 1 multi port loading up at idle Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause. All the Yamaha 225 HP outboard parts you need to fix your engine are here at the lowest prices available online. try to go above no wake and it stalls. Please no repair questions. Once up I am able to back off to nearly a quarter throttle and keep her on plane. The engine model is 130292 type 3016-01. back on plane no. OE GM linkage setups were designed so that outboard carb actuation begins when the center carb's throttle linkage is about 40 percent open. I can lift the warmup lever and it will hit high rpms with no problem, but when I try to run it full or even half speed while in gear it goes for about a count of 5 and then bogs down. While there is a wide range of units available, many of us cut our teeth at the lower end of the spectrum, first. Once I get it planed out it runs fine. Since new I have had issues with the motor sputtering, rough running, RPM floating up/down at same throttle setting and stalling between 1000-2000 RPM. SMARTCRAFT PRODUCT. Loosen the idle screw from that point 1/4 to 1/2 turn out. Boat motor dies coming off throttle-gctid588941 08-20-2014, 01:41 PM As I'm bringing the throttle back pretty slowly when coming down to idle speed, the engine drops down low RPMs and dies. I removed the starter, opened it up, and replaced/rebuilt the moving parts, and the starter now works great. 9hp motor bored out to a 15hp. it fires up ok but as soon as i push the throttle above a quarter of the way forward or back it looses revs and stalls. I can fish a 12 hour tourn and everytime I take off it runs rough. It stumbles for a brief second while throttling up. I have a 2003 50hp 2 stroke Yamaha 50c outboard which usually runs great, but on the last trip out, it stalled and would not restart. 1982 mercury 500 50 hp dies on idle; 1983 mercury 500 50 hp idle mixture screw location; 1984 mercury 50 hp outboard carburetor settings; 1984 mercury 50 hp throttle control adjustment; 1986 50 hp mercury engine carb mixture screws; 1988 50 hp mercury outboard carb adjustment; 1985 50 hp mercury outboard free pdf download repair manual. Took it out Friday, ran fine at first for 15 or 20 minutes then dropped from 4300rpm down to 3000 to 3500 and wouldn't go any higher at WOT. When the outboard motor fails to start, verify all of the following: Gas in the tank. The choke is controlled by a single lever control mounted on the tank. Manuals contain step-by-step repair procedures, illustrations, pictures and advanced troubleshooting. I've revved the engine like this in the past (with the moped stationary), but for shorter durations. Engines in older cars and other gas-powered vehicles also had a carburetor before the introduction of fuel. You can run em without the metal. Shop Evinrude, Honda, Mercury, Nissan, Suzuki, Tohatsu and Yamaha parts. outboard runs great but will no go above idle in gear Posted by TutHillTiger on 8/4/14 at 1:27 pm. Mr Efficiency Jul 23, 2018. This INSTANT DOWNLOAD 6 horsepower Mercury, Mariner, Yamaha, Suzuki, Johnson and Evinrude outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. This INSTANT DOWNLOAD 80 horsepower outboard engine repair manual was designed for do-it-yourself mechanics and factory trained technicians. I think the 8 pitch sacrafices some top speed as she is likely only doing about 25mph. Increased fuel economy and outstanding overall performance. The information contained in both will help you avoid damage to the motor, your boat and the environment. 9hp motor bored out to a 15hp. The Eurofighter Typhoon is a twin-engine, canard–delta wing, multirole fighter. 0L OMC Cobra (1998 GM/Mercruiser 3. It will restart fine but does the same again when put in gear. try to go above no wake and it stalls. Idles ok and part throttle is ok. Hitting the choke can actually keep it from stalling but she will stall if left alone and has no power. 1 multi port loading up at idle Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause. dboyd351 LawnSite Bronze Member. DOWNLOAD 90HP Outboard Repair Manual Sunday, December 29, 2013. back on plane no. If you pin the throttle it jumps to 3200 and then strugles to 3600 and then a rocket ship. When throttle is advanced in gear the motor dies. Since new I have had issues with the motor sputtering, rough running, RPM floating up/down at same throttle setting and stalling between 1000-2000 RPM. Strange, since the mechanic actually took out chunks of plastic from the fuel line and said that MUST have been the issue - fuel restriction. As I continued to back off on the throttle, the engine stalled. First off If you don’t know, time for new plugs then, even if you think it runnng better now, $5 and 10 minutes later, if will be worth it. Following is a summary of my digging.