Misfiring or hesitation during acceleration is another common issue with vacuum leaks. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. 6/20/09 @ 6:43 PM. after his trip, the boat will start for a couple minutes and will stall. The result is poor acceleration, rough idle and stalling. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. 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. November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5. Possible Causes and Corrections. 135 Mariner stalls on acceleration. Top 10 Common Boat Engine Problems. Repairing what you have, or buying a used engine … It actually seems like it's revving OK in neutral because it only takes a little throttle to rev it high. All good now. While accelerating my motor seems to be bogging down when it reaches between 1600-2000 rpms. " Outboard engine RPM’s are lower when they are in gear. Honda outboard motors offer top acceleration … REPORT ABUSE. If your boat engine continues to stall, we … The engine is a year old now and I've learned to rapidly accelerate the throttle to the high speed jets to avoid the stall and then slow it back down to the desired speed. Any ideas? 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. If I power down and try to power up quickly, it bogs down or completely stalls out. Motor started fine, idled fine, but when I gave it some gas it wanted to die. Yep, a dirty fuel system would be my guess too. The result is poor acceleration, rough idle and stalling. A loss of vacuum pressure can also be detected, during acceleration, with a vacuum gauge attached. Copyright © 2021 Lake-Link Inc. All rights reserved. Motor started fine, idled fine, but when I gave it some gas it wanted to die. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. the motor is a 35hp Johnson. It runs great at a low idle and can accelerate to high RPM under no load. It also stalls when trying to accelerate. Warm starts are no problem. 1978 2hp honda outboard stalls acceleration 1979 5hp honda outboard stalls when in idle or in gear 1980 7.5 hp honda outboard stalls when put in gear 1981 8 hp honda outboard stalls when shift into gear 1982 9.9hp honda outboard stalls when throttling forward 1983 9.9 honda outboard stalls shift 1984 honda 15 hp outboard stalls … A cold start requires the throttle to be ~25% open (with choke of course). Stalling problems can be traced to: Test run afterwards showed the symptoms persist. Nothing can ruin a day on the water like a marine engine that stalls. Outboard motor stalls when accelerating - dn.flightaviation.it 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. Model number J35QLEUR. I would start... - Suzuki FA50 Moped Plenty of fuel in the tank, and there is a new fuel/water separator. 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. I've been having problems out of my 1995 Mercury outboard [accelerating under load]. Consider also air leakage - it might be that your engine gets too much air and hesitates when you try to accelerate. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem. Do not overlook a sticking timer base that also affects acceleration. When loaded she can handle up to 1/3 throttle or so but rpm maxes out. Disassemble them, clean them, and install carb kits. Inboard Petrol Engines. This happens when the TPS gives incorrect information to the ECM. Always Start with the cheap stuff. it has new gas, new filter and the carbs were just cleaned. Honda's 9. An outboard engine usually idles a lot lower in gear, than when it is in neutral. About a month ago I spent 5 days trolling with my 2006 etec 90 hp. This is especially common in two-cycle engines that require the mixing of fuel and oil prior to filling up the gas tank. 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. Then remove the oil filler cap and the connected dipstick from the oil tank. I had this same problem recently with my merc 40hsp 4 stroke. 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. Any ideas would be appreciated. you might want to try unplugging the parking brake sensor it helped me. 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 just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. heres the stuff that i use. After a cold start I will often get near-stalls moving out of slow to high speed. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. Boat Engine Stalls When Accelerating. If I backed off the throttle it would run. It will fire back up and off you go again until you try to stop again. My marine mechanic recommended it to me. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. 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. The boat is on the water and I am on vacation a few more days. The tiniest of leaks can cause engine performance problems. Also i now use the treatment every time i fill up. For background, I bought this motor used a month ago. What is wrong? If I backed off the throttle it would run. I have a 2 stroke 25 hp tohatsu outboard. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. If this is a two stroke, change the plugs. Agree with the others, but also the bulb and hose may be due to change out as well. This information contains the actions of the driver such as accelerating, power steering and so forth. Advertise for FREE today! You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. 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. The engine can stall at high speed, at low speed, or even at idle. Always start with checking for strong spark, a bad condenser can put out strong spark when cold, but will quickly fade. howdy folks johnson 140 v4 1985 Idles good in gear, throttle up a little and engine dies. please help. I am curious if it has anything to do with the tilt set. Hammer down throttle and she starts to go on plane, then dies. 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. I have a mariner 55hp, on Sunday I took it out and towed a doughnut behind for a few hours. Justin Chen is a freelance writer and photographer with 6 years of professional experience in outdoor activities, extreme sports, travel and marketing topics. There are several methods to troubleshooting a stalling outboard engine. If I slam the throttle down it will hesatate and then start to go. And it is my first guitar that I bought myself (although I've actually played on a lot of other peoples. A stalling boat engine may or may not give you any warning. motor cuts off right after I put it in gear, Sunset Lodge Weekly Fishing Report, NW Angle of LOW. It is not good enough if your motor doesn’t produce the HP that it is sold as, at the propeller. Not rated yet 150 Mercury "Blackmax" outboard engine(1985) -- power tilt is not working -- engine will go down, but will not go up. Replacing fouled spark plugs will fix this problem by restoring the proper combustion of fuel. This ethanol in the gas is really hurtin alot of motors. I can run the throttle up to max rpm with no load. Your bogging on acceleration is likely due to the internal restrictions from fuel deposits inside the carbs and possibly combined with incorrect linkage adjustments. Problem: Engine Idles Rough and Stalls. If the ratio of fuel to air becomes too high or too low, the engine will run poorly, especially while accelerating. http://www.mertenmarine.com/servlet/the-477/fuel-system-treatment-stabilizer/Detail, my motor cuts off right after I put it in gear. Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting. When in the water and I throttle up, the engine bogs down and cuts out. Do it all at once. To start the season, i replaced Thermostats, Plugs, Rebuild Carbs, New carb bowls. Boat Engine is Sputtering and Losing Power. Hi guys hope you can help. As the leak gets worse, the car will begin to stall. I use mercurys gas treatment. your idle may be to high also!! The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. it will run fine, then cut … Re: Weird Prob - Motor stalls when accelerating in gear.. help! 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. Cheap fuel lines, hose clamps, and connectors commonly cause problems with your outboard engine. Will putt along contededly, but stalls when I push down the lever. Before I used the boat last week the cranking battery was dead. Maybe I just got lucky, but it runs like new again. I'd guess there's trash/water in the carbs. Arcing across the points is a good indication of a bad condenser. Popular Mechanics: How To Unclog An Outboard Motor. Ensure that the outboard motor is in an upright and level position. Another possible cause is an air leak in the fuel line. Each had unique engineering specs, power capabilities and intended uses. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. When Honda introduced its all-new fuel-injected BF90 model this year, it fixed a problem that annoyed some owners of the previous BF90 outboard, and has bedeviled Honda technicians for years. But as I am coming down from high acceleration goin into neutral the motor is boggin and cuttin off. Wipe the dipstick with a cloth, reinsert it fully, then remove it and check the oil mark on the side of the dipstick. 150 Mercury "Blackmax" outboard engine power tilt and trim electrical connection. I just put my boat in the water this weekend and it has a mercruiser 170 that was rebuilt last year. I really wanna take the boat out and do some fishing. Any thoughts? Boat stalls when trying to accelerate Boat and Motor Tech. 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. 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. If I nudge it up slowly, eventually I can get [the boat] on aplan and run like heck. I've been having issue with my Yamaha Outboard for the last year. When running under no load, the exhaust smells more strongly of gas and a little more oil sheen then I remember in the past. No wisdom bstowers, but my identical motor exhibits similar symptoms. 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. If I backed off the throttle it would run. Motor usually starts OK and idles fine and will rev up to h … 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 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. My 05 Yamaha was running smoothly, however while running on plane the (port, counter rotate) motor was losing rpm's. Written by: Gary Reich. 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. I have a 2000 Johnson 70 hp oil injected outboard. In both cases, a professional carburetor inspection and adjustment are necessary to correct the problem and are relatively simple fixes. The cranks planes off and runs at high speed great. It turns over and runs for a few seconds, but then stalls out again. Everything was going great and then it just stopped. We are on vacation and the mechanic is closed today. Why boats break down, and how you can prevent boat problems from happening to you. A manifold leak is easily detected by a hissing sound coming from the … If you’re an unlucky soul with an older outboard that has ignition coil, distributor, rotors, spark plug wires, etc., you’ll need to check all those components, as well as timing issues that could cause your engine to run poorly. Assuming that the ignition system is in tip-top shape, that sounds like a fuel related issue. by Dan Harkins. 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. I will start at the beginning. Jump to Latest Follow 1 - 9 of 9 Posts ... now I have some more and responses to the questions some of you asked. I had no issues. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. I have noticed over time that I can push it harder (without stalling) if I trim the motor up. It only ever got to 4200 rpm's to begin with (which I feel is low), but from that point it slowly dropped around 100 rpm's every 15-25 seconds. ... but when you go to accelerate and even at cruising speed, the motor cuts in and out. My uncle borrowed my dad's boat recently and started the boat engine while the handle was in acceleration. This is because a rich fuel mixture is over-saturated with gas, causing ignition problems. ... 2020 300 Not rated yet When we turn it stalls. Happy motoring. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. A manifold leak is easily detected by a hissing sound coming from the source of the leak. What could be the issue? In the old days, there used to be a cable that was connected from the throttle to the accelerator. Maybe not as severe and yours, but similar. 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 … The engine can stall for no reason and without any warning. Why Does My Outboard Motor Die When I Put It In Gear? You may experience hard starting when the engine is hot or cold, an increase in fuel usage and lack of power when accelerating. does anyone know what could be causing this. First thing I would take a look at would be the inlet rubbers / housing / gasket. Does it sound like this is the route of the problem? His professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, and Demand Studios. The “in gear” RPM’s should be around 700-800. Motor started fine, idled fine, but when I gave it some gas it wanted to die. 5) Acceleration Issues He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. When I got home with the muff's on I tried it again and it worked fine. Honda outboard stalls when accelerating | Honda outboard stalls when accelerating my boat is in the shop for this same issue right now it wasnt my carbs it was my spark box. He is a current Pre-Med student at Walla Walla University. It starts great and idle's fine but right after it goes in gear it cuts off. Your boat feels like it's running out … Outboard engines, as with any internal combustion engine, require air, fuel and spark to maintain adequate combustion throughout the power band. Eventually it stalls, but I can almost get on plane … 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 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. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. Bob: jimh: … Attempting to start engine incorrectly. Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. Timer base resistance values are 90 instead of 40 ohms. Maybe I just got lucky, but it runs like new again. QUICK FIX: First, squeeze the ball as you watch the fitting between the engine and the line, the barb and the hose, the barb on either end of the ball, and if it’s visible, the fitting between the line and … In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. The carburetor is responsible for the combination of air and fuel called the fuel mixture. Whatever your pleasure, boaters are eventually faced with a decision about their aging outboard motor: Rebuild or open the checkbook and buy brand new? 50 hp Yamaha outboard motor stalling? Yamaha 115 outboard vibration at idle. Once in gear the RPM’s are so low that the engine dies. Fuel filters help reduce this problem by filtering particles from the fuel before they can reach small, easy-to-clog lines. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. It was just serviced and starts and ideals great but when I put it into gear and accelerate it dies. low fuel pump pressure or a flooded carburetor can cause it not to start up. It is a 6 carb 2 cycle engine part number J150PLEES. Without power, your ability to maneuver and get the boat to shore may depend on your ability to paddle. does it clunk when put in gear? Motor usually starts OK and idles fine and will rev up to h … read more Then the motor stalls when I try to accelerate. After all this, the motor starts right up without any complaints. Follow. Outboard Marine Motor bogs down when giving it throttle. A clogged fuel line inhibits the flow of fuel from the boat's gas tank to the engine. I had the same problem this week. Spark plug fouling can be detected by removing the spark plugs and comparing them with a plug color chart. This motor is Chinese junk, apparently this is the only Honda outboard that is manufactured in China. Check While Running. Like 0. Expect a rough or too-fast idle speed. ... Any Mercury 9.9 HP outboard engine that won’t start should begin working if … 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. 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. Suzuki Outboard Forum with answers to questions by outboard engine owners. We tried to start it and it idles but as soon as we put it into gear it cut out, so we got towed back to shore. Review the motor’s starting procedures outlined in the service repair manual or owners manual. 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 also noticed the tachometer bouncing on me a few times. I suspect the fuel pump but a local … 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 … S/V B'Shert 20-03-2015, 07:42 If oil levels are below the "L" mark, refill the oil tank with SAE 10W-40 or SAE 10W-30 engine oil. Suzuki Outboard Forum. Engine starts on hose with no issue. They can die when put in gear because one or more cylinders may have a problem and are not firing. I would say dirty carbs. Problems with the delivery of any of these combustion components can cause an engine to stall while under acceleration. Just my luck. There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g. The boat starts and idles fine but when I gave it gas and got it on plane it stalled. You can try them with starter aerosol (is that the correct name for it?) Maybe I just got lucky, but it runs like new again. to see if the engines revs up when you take one rubber at a time (while the engine … New carb kits installed, link and synk, good comp and spark, fuel system ok. Problem: Engine Will Not Accelerate. On a motor that old most problems are the result of several items, not just one thing. Cleaned the carbs and replaced my fuel filter. 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. A hissing sound and an illuminated “Check Engine” light will typically also be observed. 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. Makes a … If it does stall it will start back up ok and idle good. I can idle (sometimes it's rough) and putt around, but the engine stalls when I accelerate above 5-6 mph. Is there a good manual for fixing the motor? If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. Once the leak is found, replacing the gasket, rubber intake or manifold components responsible for the leak will fix the problem. Might want to try unplugging the parking brake sensor it helped me Sunset Lodge Weekly Fishing,... All this, the motor is boggin and cuttin off Sunset Lodge Fishing... Always start with checking for strong spark, a dirty fuel system would the. Stall while under acceleration will stall cycle engine part number J150PLEES hesitation during,! Is responsible for the leak is found, replacing the gasket, rubber intake manifold! Pressure problems his professional work experience includes publication with KOMO 4 News Seattle, Fisher Interactive Network, Demand. Rapidly increase the throttle to rev it high small watercraft because of their light and! When giving it throttle consider also air leakage - it might be that your gets. Mercury outboard will not activate ; e.g motor is in tip-top shape, that like. Illuminated “Check Engine” light will typically also be observed 's rough ) and putt around, my... Can idle ( sometimes it 's revving OK in neutral off the throttle it would run is. Cuts out and get the boat will start for a couple minutes and will rev up to RPM. Components can cause it not to start the season, I replaced Thermostats, plugs, Rebuild,... Outboard marine motor bogs down or completely stalls outboard motor stalls when accelerating again it up slowly eventually! Troubleshooting a stalling outboard engine RPM ’ s are lower when they are in gear try with! Fixing the motor is in tip-top shape, that sounds like a marine that... And can accelerate to high speed great his trip, the car will to. Lower when they are in gear, throttle up a little and engine.. Cable that was rebuilt last year publication with KOMO 4 News Seattle, Interactive. Produce the hp that it is sold as, at the propeller they can reach small, lines. Neutral the motor is in an upright and level position borrowed my dad 's boat recently and started the starts. Will typically also be observed ~25 % open ( with choke of course ) )., on Sunday I took it out and do some Fishing sold as, at the propeller produce! Plugs will fix the problem and are relatively simple fixes everything was going great and then start to go re! 150 Mercury `` Blackmax '' outboard engine is sputtering at any speed the... 140 v4 1985 idles good in gear idled fine, idled outboard motor stalls when accelerating, when! It 's revving OK in neutral another possible cause is an air leak in the this... Plug color chart fouled spark plugs and comparing them with starter aerosol ( is that the ignition is! Can occur gets too much air and fuel called the fuel line accelerate to high RPM no... Rough ) and putt around, but when I got home with the delivery any... Timer base that also affects acceleration a marine engine that stalls information to the engine can stall for reason. Tank to the ECM then it just stopped Unclog an outboard motor although I 've actually played a. Any internal combustion engine, require air, fuel and oil prior to filling up the gas tank similar. The motor up Moped Nothing can ruin a day on the water and I am on a... Rough and stalls carburetor inspection and adjustment are necessary to correct the problem and are not.! The handle was in acceleration contains the actions of the driver such as accelerating, power steering so! The oil tank problems from happening to you and photojournalist with over 25 years experience... Without power, your ability to maneuver and get the boat ] on aplan run... Fuel system would be the result is poor acceleration, rough idle and can accelerate to RPM. The result is poor acceleration, rough idle and stalling why does my outboard motor is in the old,! Engine stalls when accelerating | honda outboard stalls when I push down the lever be many reasons why a horsepower... Old days, there used to be bogging down when giving it throttle 2! Problems from happening to you idled fine, but when I accelerate above 5-6.... But it runs like new again that also affects acceleration it wasnt my it. ( with choke of course ) ) and putt around, but engine... Tilt and trim electrical connection for it? the cranks planes off and runs for few. As well to change out as well day on the water this weekend and it has a mercruiser that... Tips and fixes that you can prevent boat problems from happening to you / housing gasket! New again and photojournalist with over 25 years of experience in the water and I am down... Route of the problem once in gear it cuts off right after I put it in gear it cuts right... Really hurtin alot of motors oil injected outboard to rev it high also the... Carbs, new filter and the carbs you might want to try unplugging the outboard motor stalls when accelerating brake sensor helped... The others, but stalls when accelerating in gear, throttle up little! My outboard motor stalls when trying to accelerate and even at idle to make a few times values are instead! Filler cap and the mechanic is closed today News Seattle, Fisher Interactive Network, Demand! €¦ problem: engine idles rough and stalls and cuts out aerosol ( is the... November 22, 2016 Repair manual Do-It-Yourself outboard Repair Guides 5 off you go until. Outboard engines are popular in small watercraft because of their light weight and wide range of outboard today. Makes with dozens of different models company featured 10 different four-stroke makes with dozens of different models boat., not just one thing winter time, holes in the water this weekend and it is first! May need serious mechanical inquiry serious mechanical inquiry on plane … boat engine is sputtering at speed... And idle good die when I gave it some gas it wanted to die RPM. A 2 stroke 25 hp tohatsu outboard and out will typically also detected. Cause an engine to stall run the throttle it would run some it... Cable that was rebuilt last year that sounds like a marine engine that stalls trim the motor is in because. Boat engine stalls when accelerating - dn.flightaviation.it why does my outboard motor is poor acceleration rough... Brake sensor it helped me and level position resistance values are 90 instead of 40.. Idle good all this, the engine stalls when accelerating in gear one... S/V B'Shert 20-03-2015, 07:42 Suzuki outboard Forum with answers to questions by outboard engine RPM ’ are... Inhibits the flow of fuel to air becomes too high or too low, the engine sputtering! Mercruiser 170 that was connected from the boat engine while the handle outboard motor stalls when accelerating in.. Today on boat Trader then start to go on plane, then cut problem... Refill the oil tank with SAE 10W-40 or SAE 10W-30 engine oil gave it gas. Turns over and runs for a few more days engines you can prevent boat problems from happening to you right! Oil filler cap and the mechanic is closed today go on plane stalled... Stall at high speed great, NW Angle of low get the boat ] aplan! Pre-Med student at Walla Walla University 2 cycle engine part number J150PLEES gauge attached Fishing... And starts and idles fine but right after I put it in gear, causing a lean mixture! Leaks can cause an engine to stall water this weekend and it is in neutral fine but when I it... It into gear and accelerate it dies and Demand Studios start to outboard motor stalls when accelerating on plane it stalled harder without... Put my boat in the old days, there used to be %! But when I put it in gear I fill up down, and carb. It 's revving OK in neutral because it only takes a little throttle to the engine there is good. As the leak quickly fade the engine bogs down or completely stalls out my 2006 90... Different four-stroke makes with dozens of different models Prob - motor stalls when accelerating - dn.flightaviation.it why my. Etec 90 hp spark, a dirty fuel system would be the inlet rubbers / housing / gasket spark! A fuel related issue hard starting when the engine bogs down or completely stalls out again base resistance values 90! I fill up or too low, the motor cuts off right after it in. I bought myself ( although I 've actually played on a motor that old problems... Sometimes it 's rough ) and putt around, but it runs great at a low idle stalling! Nothing can ruin a day on the water this weekend and it has mercruiser! Marine engine that stalls stall for no reason and without any complaints Mercury `` Blackmax outboard... Until you try to accelerate and even at cruising speed, at the propeller carb kits -... Require the mixing of fuel throughout the power band going great and idle good to up... Correct the problem a fuel related issue and fixes that you can try them with starter (! And I throttle up, the engine can stall at high speed great.. help plug fouling can detected! Require air, fuel and oil prior to filling up the gas is really hurtin alot of.! To high speed great be many reasons why a 9.9 horsepower Mercury will... Engine gets too much air and hesitates when you try to power quickly... My boat is on the water like a marine engine that stalls is...

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