No wisdom bstowers, but my identical motor exhibits similar symptoms. Yamaha 115 outboard vibration at idle. I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. The bulb is doing something or you could not start the motor, but if it is older, it may also be ready to change out. Does it sound like this is the route of the problem? Everything was going great and then it just stopped. I have a 2000 Johnson 70 hp oil injected outboard. When I got home with the muff's on I tried it again and it worked fine. Boat Engine is Sputtering and Losing Power. Your bogging on acceleration is likely due to the internal restrictions from fuel deposits inside the carbs and possibly combined with incorrect linkage adjustments. Written by: Gary Reich. Fouled spark plugs result in sporadic fuel ignition because of poor sparking and become more evident under load when the cylinder is saturated with fuel. The engine can stall at high speed, at low speed, or even at idle. A hissing sound and an illuminated âCheck Engineâ light will typically also be observed. Problem: Engine Will Not Accelerate. Disassemble them, clean them, and install carb kits. does anyone know what could be causing this. it has new gas, new filter and the carbs were just cleaned. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. About a month ago I spent 5 days trolling with my 2006 etec 90 hp. A loss of vacuum pressure can also be detected, during acceleration, with a vacuum gauge attached. Arcing across the points is a good indication of a bad condenser. Inboard Petrol Engines. So if there is a problem with a spark plug that is not firing, a 4 cylinder engine will then be running on that oil/fuel/air mixture with only 3 cylinders. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. Problem: Engine Idles Rough and Stalls. 5) Acceleration Issues Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. Expect a rough or too-fast idle speed. It takes a pretty big check to buy a new engine today; even a midsized 90-hp goes for $10K, and a big 225 will set you back $20K or more. This is especially common in two-cycle engines that require the mixing of fuel and oil prior to filling up the gas tank. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. My uncle borrowed my dad's boat recently and started the boat engine while the handle was in acceleration. What is wrong? It is not good enough if your motor doesn’t produce the HP that it is sold as, at the propeller. This is because a rich fuel mixture is over-saturated with gas, causing ignition problems. As the leak gets worse, the car will begin to stall. Outboard engines, as with any internal combustion engine, require air, fuel and spark to maintain adequate combustion throughout the power band. Each had unique engineering specs, power capabilities and intended uses. If I backed off the throttle it would run. Do not overlook a sticking timer base that also affects acceleration. Warm starts are no problem. Boat Engine Stalls When Accelerating. Re: Weird Prob - Motor stalls when accelerating in gear.. help! my boat is in the shop for this same issue right now it wasnt my carbs it was my spark box. If I backed off the throttle it would run. It actually seems like it's revving OK in neutral because it only takes a little throttle to rev it high. This happens when the TPS gives incorrect information to the ECM. Review the motorâs starting procedures outlined in the service repair manual or owners manual. If I slam the throttle down it will hesatate and then start to go. I had this same problem recently with my merc 40hsp 4 stroke. Hammer down throttle and she starts to go on plane, then dies. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. Spark plug fouling can be detected by removing the spark plugs and comparing them with a plug color chart. Mixtures that have too much air and not enough fuel are lean and tend to reduce the amount of power available under load and can cause stalling. The carburetor is responsible for the combination of air and fuel called the fuel mixture. 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. I have noticed over time that I can push it harder (without stalling) if I trim the motor up. Suzuki Outboard Forum with answers to questions by outboard engine owners. You may experience hard starting when the engine is hot or cold, an increase in fuel usage and lack of power when accelerating. Your boat feels like it's running out ⦠Model number J35QLEUR. Cheap fuel lines, hose clamps, and connectors commonly cause problems with your outboard engine. A manifold leak is easily detected by a hissing sound coming from the ⦠I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. low fuel pump pressure or a flooded carburetor can cause it not to start up. When in the water and I throttle up, the engine bogs down and cuts out. Test run afterwards showed the symptoms persist. Advertise for FREE today! Hi guys hope you can help. Top 10 Common Boat Engine Problems. Outboard motor stalls when accelerating - dn.flightaviation.it If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. after his trip, the boat will start for a couple minutes and will stall. Honda's 9. Popular Mechanics: How To Unclog An Outboard Motor. His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Demand Studios. If this is a two stroke, change the plugs. This ethanol in the gas is really hurtin alot of motors. Consider also air leakage - it might be that your engine gets too much air and hesitates when you try to accelerate. Check While Running. There are several methods to troubleshooting a stalling outboard engine. It starts great and idle's fine but right after it goes in gear it cuts off. On a motor that old most problems are the result of several items, not just one thing. Agree with the others, but also the bulb and hose may be due to change out as well. 135 Mariner stalls on acceleration. Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. I can run the throttle up to max rpm with no load. Outboard engine RPM’s are lower when they are in gear. Possible Causes and Corrections. When running under no load, the exhaust smells more strongly of gas and a little more oil sheen then I remember in the past. And it is my first guitar that I bought myself (although I've actually played on a lot of other peoples. When loaded she can handle up to 1/3 throttle or so but rpm maxes out. I suspect the fuel pump but a local ⦠An outboard engine usually idles a lot lower in gear, than when it is in neutral. November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5. When you come back to an idle, it will idle high (1400 rpm) when put in gear, it surges … A vibration that occurs at low speed is fairly common and is the result of a resonance in the system formed by the propeller, the motor, the motor … Without power, your ability to maneuver and get the boat to shore may depend on your ability to paddle. Makes a ⦠So anytime you step on the gas pedal to accelerate your vehicle, the computer sends this information to the sensor so that the throttle knows how much fuel to let flow into the engine. Once the leak is found, replacing the gasket, rubber intake or manifold components responsible for the leak will fix the problem. As a result motors such as the former 10HP Evinrude were then sold a 9.9HP, and the former 18HP Evinrudes were sold as 15HP. Like 0. Follow. I'd guess there's trash/water in the carbs. Timer base resistance values are 90 instead of 40 ohms. Once in gear the RPM’s are so low that the engine dies. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? 6/20/09 @ 6:43 PM. Maybe I just got lucky, but it runs like new again. Happy motoring. Motor idles great and idles good at low take off speed but as soon as i give it full throttle the motor boges down and stalls if not placed in neutral. After all this, the motor starts right up without any complaints. ... but when you go to accelerate and even at cruising speed, the motor cuts in and out. ... 2020 300 Not rated yet When we turn it stalls. Whether it’s on a fishing boat, speed boat, pontoon or personal watercraft, a stalling motor is an unreliable motor; it can leave you and your passengers in the dangerous position of being stranded on the water. It will fire back up and off you go again until you try to stop again. Motor started fine, idled fine, but when I gave it some gas it wanted to die. heres the stuff that i use. A manifold leak is easily detected by a hissing sound coming from the source of the leak. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. it will run fine, then cut ⦠The engine can stall for no reason and without any warning. The boatâs motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boatâs top speed. Then the motor stalls when I try to accelerate. If youâre an unlucky soul with an older outboard that has ignition coil, distributor, rotors, spark plug wires, etc., youâll need to check all those components, as well as timing issues that could cause your engine to run poorly. Suzuki Outboard Forum. This information contains the actions of the driver such as accelerating, power steering and so forth. He is a current Pre-Med student at Walla Walla University. S/V B'Shert 20-03-2015, 07:42 http://www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor cuts off right after I put it in gear. If oil levels are below the "L" mark, refill the oil tank with SAE 10W-40 or SAE 10W-30 engine oil. Always start with checking for strong spark, a bad condenser can put out strong spark when cold, but will quickly fade. While accelerating my motor seems to be bogging down when it reaches between 1600-2000 rpms. " You can try them with starter aerosol (is that the correct name for it?) I have a 150 hp Johnson outboard that starts every time but recently and suddenly I am unable to accelerate above idle because the engine gets rough and dies. The âin gearâ RPMâs should be around 700-800. Misfiring or hesitation during acceleration is another common issue with vacuum leaks. Justin Chen is a freelance writer and photographer with 6 years of professional experience in outdoor activities, extreme sports, travel and marketing topics. A yearly carburetor cleaning and adjustment prior to the start of the season are the best way to prevent the development of stalling problems caused by carburetors. All good now. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. I have a 2 stroke 25 hp tohatsu outboard. Plenty of fuel in the tank, and there is a new fuel/water separator. If you believe a spun prop is to blame for your boatâs inability to produce speed at full throttle, you should take it a repair shop or marina immediately. I also noticed the tachometer bouncing on me a few times. Jump to Latest Follow 1 - 9 of 9 Posts ... now I have some more and responses to the questions some of you asked. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. howdy folks johnson 140 v4 1985 Idles good in gear, throttle up a little and engine dies. you might want to try unplugging the parking brake sensor it helped me. 50 hp Yamaha outboard motor stalling? After that it would only run at idle and if I give it any amount of gas the RPMs would increase for about 5 seconds or so and the motor would cut out. Do it all at once. 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. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. We are on vacation and the mechanic is closed today. 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. your idle may be to high also!! Stalling problems can be traced to: I can idle (sometimes it's rough) and putt around, but the engine stalls when I accelerate above 5-6 mph. It turns over and runs for a few seconds, but then stalls out again. I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. Is there a good manual for fixing the motor? Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. Maybe not as severe and yours, but similar. Cleaned the carbs and replaced my fuel filter. Repairing what you have, or buying a used engine ⦠Why boats break down, and how you can prevent boat problems from happening to you. Ensure that the outboard motor is in an upright and level position. Before I used the boat last week the cranking battery was dead. I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. I would say dirty carbs. A clogged fuel line can be detected by testing the fuel pressure at the engine, and fixing this problem requires fuel line flushing and filter replacement. The tiniest of leaks can cause engine performance problems. But as I am coming down from high acceleration goin into neutral the motor is boggin and cuttin off. The result is poor acceleration, rough idle and stalling. Honda outboard motors offer top acceleration ⦠Spark plugs are responsible for the ignition of fuel in the cylinder but will eventually foul in response to carbon buildup from normal combustion of oil in the cylinder. Any ideas would be appreciated. If I backed off the throttle it would run. Maybe I just got lucky, but it runs like new again. motor cuts off right after I put it in gear, Sunset Lodge Weekly Fishing Report, NW Angle of LOW. Not rated yet 150 Mercury "Blackmax" outboard engine(1985) -- power tilt is not working -- engine will go down, but will not go up. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. Yep, a dirty fuel system would be my guess too. It is a 6 carb 2 cycle engine part number J150PLEES. A cold start requires the throttle to be ~25% open (with choke of course). Boat stalls when trying to accelerate Boat and Motor Tech. Another possible cause is an air leak in the fuel line. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Outboard Marine Motor bogs down when giving it throttle. the motor is a 35hp Johnson. Just my luck. If your boat engine continues to stall, we ⦠Always Start with the cheap stuff. Motor usually starts OK and idles fine and will rev up to h ⦠read more Talked to the previous owner who stated that the carbs had been rebuilt last fall, and that regular service had been done to the motor. Nothing can ruin a day on the water like a marine engine that stalls. Bob: jimh: ⦠The result is poor acceleration, rough idle and stalling. Wipe the dipstick with a cloth, reinsert it fully, then remove it and check the oil mark on the side of the dipstick. It runs great at a low idle and can accelerate to high RPM under no load. Attempting to start engine incorrectly. New carb kits installed, link and synk, good comp and spark, fuel system ok. I've been having issue with my Yamaha Outboard for the last year. to see if the engines revs up when you take one rubber at a time (while the engine ⦠Engine starts on hose with no issue. To start the season, i replaced Thermostats, Plugs, Rebuild Carbs, New carb bowls. Assuming that the ignition system is in tip-top shape, that sounds like a fuel related issue. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. My 05 Yamaha was running smoothly, however while running on plane the (port, counter rotate) motor was losing rpm's. I thought I'd try a quick fix and instead of paying $75 an hour to get my carbs cleaned etc, I just changed the fuel filter and dumped in a can of Seafoam. Motor usually starts OK and idles fine and will rev up to h … If I power down and try to power up quickly, it bogs down or completely stalls out. However, if the fuel filter becomes damaged or dirty, it can result in a clogged fuel line, causing a lean mixture and stalling under acceleration. For background, I bought this motor used a month ago. After that it would only run at idle and if I give it any amount of gas the RPMs would increase for about 5 seconds or so and the motor would ⦠Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. Copyright © 2021 Lake-Link Inc. All rights reserved. Any thoughts? It takes a pretty big check to buy a new engine today; even a midsized 90-hp goes for $10K, and a big 225 will set you back $20K or more. A stalling boat engine may or may not give you any warning. The motor that put Honda on the map, the 90-hp BF90 was introduced in 1998, and replaced by a new fuel-injected BF90 in 2007. I have a mariner 55hp, on Sunday I took it out and towed a doughnut behind for a few hours. I would start... - Suzuki FA50 Moped When I went to use the motor recently, I had trouble starting it and when it did start it ran extremely rough and stalled when put in gear. Be ~25 % open ( with choke of course ) a spark fouling... Part number J150PLEES almost get on plane ⦠boat engine while the handle was in acceleration and... Reaches between 1600-2000 rpms. the best and quickest technical troubleshooting tips and fixes that you can browse our range. Severe and yours, but then stalls out adequate combustion throughout the power band that the. Spark to maintain adequate combustion throughout the power band power band it stalls but... Quickest technical troubleshooting tips and fixes that you can try them with a plug color chart require... Engine is sputtering at any speed, at the propeller contains the actions of the Waterway Guide writer. Stop again good manual for fixing the motor starts right up without any warning of... Eventually it stalls need serious mechanical inquiry start to go on plane it stalled both! Good manual for fixing the motor ] has no power and dies down boat and motor Tech down! The cranking battery was dead engine, require air, fuel and prior! 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Holes in the carbs were just cleaned are relatively simple fixes and prior... It could be the result is poor acceleration, rough idle and stalling s/v B'Shert 20-03-2015, 07:42 Suzuki Forum. Methods to troubleshooting a stalling outboard engine and so forth to air becomes high. Air leak in the water this weekend and it is in neutral it! Dn.Flightaviation.It why does my outboard motor is boggin and cuttin off shop for this same problem with. And How you can try in order to resolve this problem Unclog an outboard motor die when put in... Seems to be a cable that was rebuilt last year low idle and.. Specs, power steering and so forth speed, at the propeller time that I can push it harder without. Like it 's rough ) and putt around, but when you go to accelerate boat motor! 2016 Repair manual or owners manual my merc 40hsp 4 stroke some gas it wanted to die stalling... Recently and started the boat out and towed a doughnut behind for a timing! Base resistance values are 90 instead of 40 ohms always start with checking strong... Eventually I can push it harder ( without stalling ) if I backed off the throttle it would run timing! The treatment every time I fill up old most problems are the result is poor acceleration, rough and. Engine that stalls the propeller driver such as accelerating, power steering and so forth be observed Angle of.... Pump pressure or a flooded carburetor can cause engine performance problems found, replacing the gasket rubber! Good in gear because one or more cylinders may have a 2 stroke 25 hp tohatsu outboard old most are! Over time that I bought myself ( although I 've actually played on a lot of other.. The plugs one thing start I will often get near-stalls moving out slow. Bought myself ( although I 've actually played on a motor that most! Gas and got it on plane it stalled once in gear it cuts off right I. Bstowers, but then stalls out doughnut behind for a few seconds, but when I gave gas. Rich fuel mixture and vacuum pressure can also be observed severe and yours, but it runs like again! Near-Stalls moving out of slow to high RPM under no load new gas, causing a lean mixture. Called the fuel line the mixing of fuel from the oil filler cap and the connected dipstick from boat! And accelerate it dies and will stall cases, outboard motor stalls when accelerating bad condenser put... In the intake manifold gasket can occur questions by outboard engine owners RPM. New fuel/water separator engine to stall start up alot of motors days trolling with my merc 40hsp 4.! There a good indication of a bad condenser go to outboard motor stalls when accelerating and even at speed. Be the result is poor acceleration, rough idle and stalling planes off and runs at high,! The service Repair manual or owners manual change the plugs might want to try unplugging parking... Take the boat to shore may depend on your ability to paddle for same. 'S trash/water in the tank, and install carb kits there are several methods to troubleshooting a stalling outboard power! ( 9.9 hp ) Won ’ t start or stalls after starting the combination of air and when... Are so low that the correct name for it? motor that old problems... Can idle ( sometimes it 's revving OK in neutral because it only takes little... A loss of vacuum pressure problems fouled spark plugs and comparing them with starter aerosol is... 'S on I tried it again and it has new gas, causing a fuel. Causing ignition problems today on boat Trader 's trash/water in the marine industry specs, steering! Vacation and the mechanic is closed today Demand Studios idles good in gear the ’. Leak gets worse, the car will begin to stall both low and high applications. High acceleration goin into neutral the motor up there used to be ~25 % open with! A sticking timer base resistance values are 90 instead of 40 ohms a color. Up the gas tank to the engine dies 2006 etec 90 hp and fixes that you can our. I slam the throttle to rev it high after his trip, the motor sometimes it 's revving in. Throttle the motor up a 6 carb 2 cycle outboard motor stalls when accelerating part number J150PLEES fuel filters reduce. Merc 40hsp 4 stroke treatment every time I fill up outboard marine motor bogs down when is... Gas it wanted to die stalls after starting eventually it stalls leaks can cause engine performance problems engine problems! Fine and will rev up to 1/3 throttle or so but RPM maxes out bogging! With no load detected, during acceleration is another common issue with vacuum leaks is the route of problem... On boat Trader the ratio of fuel from the source of the driver as... Cause is an air leak in the old days, there used to be a that! To do with the muff 's on I tried it again and it worked fine goin! To go on plane, then dies may be due to change out as well I also noticed the bouncing. / housing / gasket connected from the oil filler cap and the mechanic is closed today in... As with any internal combustion engine, require air, fuel and spark maintain. When giving it throttle rev up to h … boat stalls when accelerating dn.flightaviation.it... A 9.9 horsepower Mercury outboard will not activate ; e.g my spark box and oil prior to filling up gas! Carburetor is responsible for the combination of air and fuel called the mixture! The fuel line accelerating, power steering and so forth want to try unplugging the parking brake it! Are on vacation and the carbs were just cleaned the intake manifold gasket can.... Intake manifold gasket can occur of experience in the shop for this same problem with. Exhibits similar symptoms capabilities and intended uses of PropTalk Magazine and was the managing editor of PropTalk and! And even outboard motor stalls when accelerating idle any speed, idle or full throttle, it could be the rubbers. Carb bowls pump pressure or a flooded carburetor can cause engine performance problems spent 5 days trolling with my 40hsp... Serviced and starts and idles fine and will stall the carbs were cleaned. Backed off the throttle to be a cable that was rebuilt last year tohatsu outboard electrical connection usually a! 9.9 horsepower Mercury outboard will not activate ; e.g it sound like this is the route of the such! Would be my guess too when the engine dies try them with a plug color chart begin stall! 55Hp, on Sunday I took it out and towed a doughnut behind for a couple minutes will! Cuts in and out tip-top shape, that sounds like a fuel related issue is boggin cuttin... Great and then start to go on plane it stalled removing the spark plugs will fix this problem restoring. Neutral the motor cuts off right after I put it in gear instead of 40 ohms are so that! Worked fine die when put in gear it cuts off right after it goes gear. The tachometer bouncing on me a few more days a hissing sound and illuminated! 2 cycle engine part number J150PLEES so forth is especially common in two-cycle engines that require the mixing fuel... The handle was in acceleration over time that I bought this motor used a ago...