The flywheel on an outboard will need to be removed when repairs are needed such as the motor not starting properly. In order to access the crankshaft of the motor the flywheel wil...Re: Root cause of Mercury 2-strokes' rough idle. Rough idle is a subjective statement. If all is normal, 2-stroke idle is acceptable. Sometimes near as good as a 4-stroke. Many things can affect idle quality. Probably too many to mention. The one that we fear the most is uneven compression. C.01-29-2015, 11:56 AM. I have been battling a stalling out problem on my Yamaha 4 stroke 225 HP engine for years now. I'm at the end of my rope. After running the engine for awhile, it sometimes decides it wants to stall out at low idle. If I squeeze the primer bulb, it will usually restart right way and will run until it decides it wants to ...Have some issues with my 90hp Yamaha outboard motor. It recently died on me out on the water. Got towed in and the engine starts fine then stalls out after 10 seconds. When I go to start it again it dies out sooner than the first time. Thinking it's a fuel issue but not sure where to start. Changed the inline fuel filter as well as the fuel ...2. Jun 26, 2008. #2. Re: Mercury 2 Stroke 50hp Won't Idle. For everyone who might have this problem, I thought I would share the solution to the problem. The carbs were loaded with water and the fuel filter was half full of water. We are going to replace the gaskets, clean out the carbs, drain the fuel filter and replace it, and also put in an ...The most common cause of this issue can be attributed to incorrect spark plugs, so be sure to check that the right spark plugs are being used first. The other issue could be an incorrect gasoline/ two cycle outboard oil mixture. More serious issues are also plausible, for example, the choke or cold start enrichment circuit could be failing to ...I have a 2004 40hp 2 stroke manual start. Boat has been sitting for 2 years stored indoors heated. I can get it started but it dies after a few seconds. If I pump the primer bulb by the pull start I c … read moreMy engine is a 2008 Mariner 40 HP 2-stroke 2 cylinder ( Belgium version) S/N 0P550276. I bought it six months ago and tested it in a barrel and it ran like a dream on the 3rd pull. When I opened the throttle, it would always take a second or two for the engine to catch up and increase rpm. I payed no attention to this.Re: Root cause of Mercury 2-strokes' rough idle. Rough idle is a subjective statement. If all is normal, 2-stroke idle is acceptable. Sometimes near as good as a 4-stroke. Many things can affect idle quality. Probably too many to mention. The one that we fear the most is uneven compression. C.Sep 11, 2012. #9. Re: 1986 40 hp Evinrude starts, runs, dies. the ball will go soft once it is running because the fuel pump takes over. If you have to keep hitting the choke you have to clean the carbs. From the tank to the fuel pump make sure that you use real clamps not the plastic ties, they seem to always leak. L.2. Bad or Old Fuel. Old fuel is often the underlying problem when your lawn mower starts then dies. Bad Fuel in your mower can cause the mower to die after running. Gasoline usually only lasts 30 days before it starts to break down and fail. It loses its ability to run well and hot because chemicals added to fuel today start to decay or fall apart.The reason your two-stroke 'loads up' is because not all of the gas gets burned through the cylinder, so it just sits in the crankcase. When you give it some throttle, the fuel/air ratio is too high, causing it to blubber and sputter until it clears out this excess fuel. When there's too much fuel going through the cylinder at the same ...Messages. 2. Mar 27, 2012. #1. Hello.. I have a 2006 Mercury 9.9 hp 4 stroke that starts great and runs for 5-10 seconds then shuts off like it runs out of gas. It starts right back up and runs for 3 sec then off. Then if I try to start again it doesn't. If I let it sit for a day it will start and run for 5-10 seconds then shuts off, etc, etc.We hope this read offers you valuable insights into why an outboard motor may not be running at full power. The common culprits discussed below include:-A spun propeller-Boat propeller entangled with debris-Fuel line air leak-Corroded spark plug wiring Additionally, apart from the question of your engine operating at full power, we discuss what might be causing acceleration hesitation.It is tight when the engine is cold but opens, ever so slightly when the engine heats up. When the gap opens, the air/fuel mixture, which passes through the crankcase on two-stroke engines, leans out to the point where the engine dies. When the engine cools and the gap tightens, the engine will run again. Maddening.Outboard won't start or stay running unless I shoot carb cleaner directly into the intake. then it runs great and will stay running on carb cleaner. already checked fuel pumps and rebuilt them. ... I have a 1996 15 hp 2 stroke mercury. ... My 1980 Mercury 500 50HP outboard surges and dies after a few minutes of running unless I squeeze the ...If the kill switch looks damaged, replace it and put the gear on neutral before starting the engine. 2. Engine May Stalls, Loss Power Or Make Excessive Vibration: Another commonly mentioned problem with mercury 4 stroke outboard or boat engines is frequent stalling, sudden loss of power, and excessive noises.Guided rod and reel fishing trips for Alligator gar on the Trinity River as well as some other places. 903-721-4296. [email protected]. Re: Yamaha 115 Dies on acceleration [ Re: cruzfishing ] #12205772 04/19/17 12:05 AM. Joined: May 2003. Posts: 11,586.6hp 2 stoke, bogs down and dies at low revs/throttle. 07-25-2019, 01:38 PM. I spent the last couple of hours taking apart and cleaning the carb on my Yamaha 6hp 2 stroke. The engine was running perfectly until a month or so ago. Moving the throttle to the start position the engine might turn over a couple of times before dying.YAMAHA 15 HP 2 stroke outboard will not stay running unless the ckoke is pulled out. This can be a common problem in many outboard motors. So let's go insi...The bulb stays hard. Even though it's hard, I tried pumping it while the motor runs for the 10 sec. I pulled the outflow fuel line off the fuel pump. Started the motor, fuel sprayed everywhere with plenty of pressure. Then the motor died at the same 10-20 mark without the fuel line plugged into the carburetor.Then, if your engine is under 25HP, you may be able to use the emergency cord to pull-start. It's possible to do this with up to a 50HP engine, but be aware that the higher the HP, the more difficult this will be. If this works, the battery is likely the issue. You may need to replace it. Reasons Your Mercury Outboard Still Isn't WorkingSep 13, 2020 · Tweet. #1. 2003 F115 hp 4 stroke problems after 15 minutes of running. 09-13-2020, 01:10 PM. My motor run great from idle to wot for about 10-15 minutes, then starts cutting out. Tach goes crazy up and down and engine really hesitates, and dies. Sometimes it starts back up, but I usually have to wait for 15 minutes for it to cool down, then it ...My engine is a 2008 Mariner 40 HP 2-stroke 2 cylinder ( Belgium version) S/N 0P550276. I bought it six months ago and tested it in a barrel and it ran like a dream on the 3rd pull. When I opened the throttle, it would always take a second or two for the engine to catch up and increase rpm. I payed no attention to this.Everything from fouled or corroded spark plug wires to debris in the gas can cause sputtering or loss of power. The first step is to identify what the cause of the problem is. The easiest way to do this is by eliminating the simplest explanation first and working your way outward until you locate the issue. The most obvious answer is fuel.Yamaha 40 hp 2 stroke - starts, idled shortly, then dies. I recently purchased a 15 foot whaler with a 40 hp 2 stroke Yamaha outboard. The previous owner had it regularly serviced and hadn't shown an issues until today. I was out with a buddy today and it was running fine.seumask said: Another Outboard question. I have a fairly ancient Yamaha 8 that starts fine and idles normally to start with. However as soon as it's used for a couple of minutes it wont run at low revs, cutting out and will only then start with the throttle fully open if at all. I have checked the fuel supply and made sure there is no water in ...Hi everybody!!!. I have a tohatsu 2006 4 stroke 9.8 hp runs less than 1 minute then dies and will restart but dies again. I bought a primer bulb thinking that was the issue but still the same i think it might be a electrical issues any advice or ideas would be greatly appreciated.Jul 14, 2012 · Jul 14, 2012. #4. Re: outboard starts, goes WOT, then dies, and wont restart. and let me clarify a little. when i start it with the choke on and throttle 1/4 past start it fires and the engine goes (not the throttle) WOT. of course the choke will not let it open up all the way, so it boggs at a certain point. open the choke and it races full ...9.9.yahama outboard engine surges while running.idle reves up really high on starting or shifting from gear to neutral then drops to low idle and stumbles o...2007 75hp efi runs great then powers down and dies. put in some sea foam and some tko and ran it 3/4 throttle for 20 min. ... I have a 1984 2 stroke 75 hp Mercury outboard, it runs great off the hose at home but won't get over 1500 Rpms full throttle in the lake, ...Either the engine randomly runs out of fuel and dies. After turning the engine off and letting it sit for a couple of minutes, you have to prime the primer bulb up again. ... If you have 4-Stroke outboards or fuel injected motors, then this will be a common issue caused by an air leak. 4-Stroke engines or fuel-injected engines will generally ...Oct 8, 2009 · Salty John said: Honda BF8, 4 stroke outboard. Ran fine but then, after not being run for three months, runs rough. It starts, idles somewhat roughly, dies after a few minutes. Under load it will run for a couple of minutes, then dies. Restarts easily - one pull - but then runs a couple of minutes and dies. I suspect a gunged up carburettor.May 15, 2006 · 26. May 15, 2006. #1. I have a 1996 Mercury 115 ELPTO that runs perfectly. The problem is that when I am running at full throttle the engine suddenly dies. It doesn't sputter at all. It just dies. Then I can fire it right back up and it will do the same thing again.Evinrude starts then dies. 06-11-2016, 09:14 PM. Thanks to Joe Reeves help my motor has been identified as a 1988 88 or 90 hp. After replacing the power pack I now have all 4 cyl firing with a nice blue spark. Now it starts up and dies in a second or two, after starting 3 or 4 times it just turns over but not starting.The Mercury 9.9 hp 4-stroke kicker motor was not running well. It would start, but die as soon as the choke was pushed in. Joe and I fixed it for free. Prett...Will crank and run briefly, then dies and gas comes out of air intake. Put a new - Answered by a verified Marine Mechanic. ... I HAVE A 2001 YAMAHA 75 HP 2 STROKE OUTBOARD MOTOR.IT STARTS AND IDLES WELL BUT IT WILL NOT REV UP UNDER LOAD MORE THAN 2500 RPM. AS I RUN AT 2500 IT WII PICK UP AFTER ABOUT 5 MIN.3474 posts · Joined 2006. #1 · Jun 4, 2014. For the past 3 weeks or so my Tohatsu 9.8 2-Stroke outboard has been acting up and I'm not sure what could be causing it. When cold (more than 1 hour after the last run), I pull out the choke and it starts on the first pull and I immediately push back the choke. The engine idles nicely, and I give ...Jun 25, 2013. #2. Re: Runs Great. Then Won't Start. Next Morning Starts Right Up. Pull a plug wire off when its not starting up and check for spark with a screw driver, you just stick the screw driver usually a phillips fits nicely, in next to the contact, hold the screw driver 3/8 inch from the engine and crank the engine over, you should see ...If your fuel pump is whining or squealing, it is typically one of two reasons. First, the pump might be starving for fuel. Fuel lubricates fuel pumps; if your fuel filter is blocked or clogged, it may be prohibiting gas from getting to the fuel pump. In this case, the problem is likely a blocked fuel filter, not necessarily a bad pump.Troubleshooting Outboard Fuel Filters. A blocked fuel filter can slow or reduce the amount of fuel reaching the engine. The primary (cup) fuel filter and secondary (in-line) fuel filter should both be inspected regularly and replaced after approximately every 100 hours of use. Your outboard owner's manual will tell you the manufacturer's ...Feb 20, 2012. Messages. 3. Feb 26, 2012. #3. Re: 1991 25HP Yamaha Outboard runs and then dies. Sparkie Boat - I gave the carbs a real good cleaning. cleaned the Pilot Jet and got the orifice to open up by cleaning. It runs well but still will just die while idling all of a sudden. Fuel pump looks good, diaphragm looks sound and not stretched out.Jul 3, 2004 · 4. Jul 3, 2004. #1. This is a 1995 9.9 Evinrude. We replaced the Tank, fuel line, and the pump that pumps the gas from the tank to the motor. When I start it and start going, the fuel pressure is lost and the motor wants to die. If I don't pump up that pump going to the motor it dies. It got the point the other day when that method didn't help.Your outboard may be stalling & running out of fuel due to three issues. Either the lift pump has failed, the boat is out of fuel or there is an air leak or blockage somewhere in the fuel lines running fuel from the tank to the engine. There are several methods to troubleshooting a stalling outboard engine. We explore the three big issues that ...Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. 1. Mixture Screws. The first thing to check before anything else is the mixture screws. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments.Timing lights are necessary to adjust the firing time of the ignition for the proper combustion of fuel. Fuel burns at a constant rate depending on compression in the engine. As th...I have a 2002 Mercury 60 HP 2 Stroke engine that starts fine idles fine runs great up to a certain RPM and then starts to sputter and won't go any faster, top speed on my boat is 26 MPH and will only go 12 MPH and the starts to sputter. replaced the fuel pump went thru the carburetors still the same results.Check your carburetor for any grime or dirt and clean it thoroughly. When it's perfectly clean, adjust the carburetor's settings to provide your engine with the proper fuel-air mixture, then try again riding at full throttle. 5. Debris in the Gas. If you have a relatively old fuel tank, look for any debris at the bottom.A car engine uses a four-stroke cycle -- how can two strokes accomplish the same tasks? Learn all about the two-stroke engine, where it's used and how it compares to a four-stroke....May 15, 2006 · 26. May 15, 2006. #1. I have a 1996 Mercury 115 ELPTO that runs perfectly. The problem is that when I am running at full throttle the engine suddenly dies. It doesn't sputter at all. It just dies. Then I can fire it right back up and it will do the same thing again.If your outboard motor keeps dying, it could be due to running out of gas, running out of coolant, or an overheating engine. Other common causes include dirty or clogged fuel filters, faulty fuel lines or carburetors, and loose spark plugs.Mercury 15hp 4 stroke….runs rough on start up. Lacks getting up on plane, and not running full power on plane. Leaning toward a defective coil. Top cylinder plug was black with carbon, bottom plug looked normal. Replaced both plugs, still lacks power. Opened the carb, looked clean, sprayed it out anyway. Still lacks power. Any clues would ...Jul 3, 2021 · 2 stroke 25/40 loosing power after 10-15 min (when warm) 07-03-2021, 02:29 PM. Like mentioned, I have 1996 (?) 25QEO, deristricted to full 40 hp, its loosing power when gets warm. On wot and cruising speed, it slowly slows down, till i'm not planning anymore. If i shut it off, pump it ( prime it) the pump feels full, it starts from first two ...Jun 11, 2014 · i have a 1988 Yamaha 40 2 stroke 3 cylinder Autolube. last year it ran good , but. not 100% ! Started it up 1 week ago and it takes 3 tries almost every time to start. once started it idles VERY rough . a low idle and then suddenly a higher idle and then a low idle , then "click" , "pop" and it dies . all of this happens in about 10-13 seconds ...This is done through a spark plug test using a spark plug tester, we have a 7 min tutorial below. It goes as follows. Disconnect the spark plug wire and connect that to the spark plug tester. Then, place the tester's tip against a clean, unpainted, bare metal part of the block (ex: bolt head).Oct 18, 2021 · Suzuki DF250A runs good and then dies. 10-18-2021, 10:23 AM. Good Morning All, I have a 2002 2800 hydra sports boat with twin 2018 DF250 engines. The boat seems to run great until I stop somewhere for a while and start back up. It will usually run for 3-5 minutes and then die. I get 3 beeps when it shuts down.Tohatsu 5hp 2 stroke runs fine for 20mins then quits and won't restart! sharpey: Engines and Propulsion Systems: 27: 14-06-2018 13:41: Tohatsu 5 2-stroke VS Tohatsu 6 4-stroke: Distant Shores: Auxiliary Equipment & Dinghy: 33: 13-04-2015 19:16: Yanmar 3gm30 dies after running: 2liveonboard: Engines and Propulsion Systems: 7: …I have a 1990 2-stroke electric start outboard that for some reason it will only run when in full choke. When I take it off choke it sputters and then dies, like it does not have enough air. After about 30 minutes on choke it will also start having power problems. I cleaned the carb. and it looked fine.Yamaha 200 HPDI Problems. 04-17-2019, 08:46 PM. My daughter bought a used boat with a Yamaha 200HP HPDI in February and has constantly had problems with the engine losing power. Her local marina mechanic has changed the thermostats, replaced the gaskets to the low pressure pumps and adjusted the cables. Each time he fixes something, the boat ...Mar 21, 2018. #1. Ok... I just purchased an older boat with a 1982 Mercury 50HP 4 cyl 2 stroke. When I first got it I had no spark so I replaced the stator. Now I have spark, it cranks for for about 3 seconds then dies. I have to choke and throttle it all the way up for it to actually crank. It cranks revs (smokes a lot) and then dies.We would like to show you a description here but the site won’t allow us.Big Jon Honda 5hp Outboard Shop Outboards. ... 2000 mercury 40hp 2cyl 2 stroke running and starting problems I have a 2000 30 HP 2cyl 2 stroke that sat outside for a few years. It fired right up, then stopped. Re-built carb. No joy. The problem was a cracked hose between the fuel pump and the carb. I also replaced all zip ties to prevent any ...The outboard might sputter and cough up a cloud of black smoke to purge out the excess fuel. Fuel additives plus running the engine hard can often fix the issue, as could cleaning the fuel injectors. Black smoke can also mean the motor is burning more fuel than it should be, which is known as running rich. Other causes of black smoke include a ...Jul 8, 2021 · 2 stroke outboard starts but then dies when throttled or idle. paulg222: General Sailing Forum: 57: 04-08-2021 14:15: Perkins 4.154 starts immediately, runs great, then knocks off once put into gear. Af: starfish62: Engines and Propulsion Systems: 16: 08-09-2015 06:32: Engine runs today--dies tomorrow: sidsail: Engines and Propulsion Systems ...#Problem No 2: Rough Running. A rough-running Mercury 75 hp four-stroke engine can be a sign of serious engine problems; it is often possible to diagnose and address these issues with the right tools and expertise. Rough running can have a variety of causes, including fuel pump failure, air-fuel mixture issues, ignition system problems, and others.8,958. Apr 28, 2014. #9. Re: Engine only runs with choke on. No it doesn't. When you pull out on the choke knob the choke plate on the carb should close, sealing off the air from the carb. When you push the choke knob in, the choke plate in the carb should be wide open, allowing air into the carb.8,646. Jan 15, 2008. #2. Re: Hard to start after warm-up. Relax, that's not unusual, and it's not a sign of impending doom. Fuel pressure should hold all day, but I'm guessing that's a symptom, not the cause of your hard start, since pumping it up doesn't immediately cure it. My theory is a leaky carb float valve (is that a carb or injection ...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). I prime the bulb, the motor cranks on 1st turn, runs well for several mins at full throttle, then dies/loses power. [repeat!]Nov 11, 2008. Messages. 328. May 23, 2012. #6. Re: Warm engine dies. yes the choke is opening, the engine will die even if it is revving higher than idle, at higher revs it also becomes impossible to keep it running, then engine shudders, coughs and spits up thru carb. Been doing some archive search and been reading about coils possibly …If your Mercury outboard run then dies and you need to change your fuel filters on the 2005 Mercury the fuel filter is difficult to find. In this video I wil...Read More: How To Increase Compression On A 2 Stroke Outboard The Easy Way. Final Thoughts. We have listed the possible reasons why your boat motor might be losing its power. Additionally, we have also mentioned a few solutions. If all else fails, try contacting a professional to know what is actually wrong with your outboard motor.Jun 25, 2005. #4. Re: Outboard stalls in gear under load. If pushing the choke helps the problem then at least you do have a carb issue. <br /><br />You can't really tell if the engine is running on all cylinders in the driveway. I have fallen for this myself. I swore up and down that it was running on all, but in the end, it was running on two. L.Jun 25, 2013. #2. Re: Runs Great. Then Won't Start. Next Morning Starts Right Up. Pull a plug wire off when its not starting up and check for spark with a screw driver, you just stick the screw driver usually a phillips fits nicely, in next to the contact, hold the screw driver 3/8 inch from the engine and crank the engine over, you should see ...VERY intermittent problem continues for over a year, can't seem to identify the problem. The engine is a 2017 Mercury 150 4-stroke mounted on a Tracker boat. The engine has 240 hours on it and the problem started occurring at about 170 hours. Symptom: Motor runs great most of the times, however it intermittently begins to miss and sputter.Jun 15, 2010. Messages. 25. Jul 9, 2010. #10. Re: Boat Runs on Ear Muffs Stalls in Water. ESAD.... first things first. if the carbs have been cleaned, put the boat in the water, set the idle up 1/4 turn on the idle screw. It's the long bolt where the throttle cable goes in the motor. You'll see that it sits against the idle stop.Jul 6, 2019 · The first thing to do is to run the engine off a portable tank using a different fuel hose. If the problem goes away, the issue is your fuel flow. The possibilities are: 1. Your tank vent is blocked. Test as suggested above by loosening your filler cap.Hey Charles, I have a 1993 115 HP Mercury 4 cylinder 2 stroke outboard. It sat for about 8 years. I have tested the compression 145 lbs on cylinders 1,2,3 140 lbs on cylinder 4. ... It will start but not run, runs rough and then dies also, ... It starts immediately, but after running for a few minutes, it dies.48,270. Visit site. Mike2309 said: Very simple Mariner5 air-cooled 2-stroke runs fine on half-choke , dies on anything less. I've had the carb off and cleaned it (though, oddly, I couldn't remove the main jet which is held up in place by a plug in the top of the float chamber . With plug removed the jet seems to levitate in the threaded hole ...Re: 2000 Evinrude 15HP 4 stroke runs great for 10 minutes, then dies. Forgot to add that the motor now will completely die after 10 minutes. Previously it would miss-fire and degrade, then quite. Now it shuts right off. It will restart after a couple of minutes, but will only run for a few seconds before dieing again.Re: 1986 Evinrude 2 Stroke V6 150 hp starts (with manual help) then dies. Please help One last thing, when I pull the spark plug in the middle right (when facing the back of the motor, standing by prop) it has dirty or blackish fluid on it almost like there's burnt fuel or oil on it and that hole has a small steam of brown fluid when I pull it.If your lawn mower still runs for a while and then dies with the fuel cap off then check for blockages in the fuel lines. Sometimes the fuel lines can swell up and restrict fuel flow. Inline fuel filters will be at the discharge to the fuel tank. Remove the bottom hose to check and inspect this fuel filter.12. Aug 3, 2010. #2. Re: Honda 9.9 4 stroke dies on idle. Today I drained the carb by opening the drain screw - and even pumped a little gas through with the primer pump - that's what my mechanic told me to do - didn't do a bit of a difference. I also took a little test trip going for about 10 minutes on full throttle.. Jun 26, 2018 · 06-26-2018, 04:52 PM. I have a question for you guys Feb 19, 2018 · In under two minutes, you could learn how t Here are the steps to fix a two-stroke engine not starting when hot: Check the fuel. Clean or replace the air filter. Check the spark plug. Ensure the compression is 110-130 psi (758.4-896.3 kPa). Ensure the oil to fuel ratio Is 50:1. Clean and adjust the carburetor. Replace worn crankshaft bearings and seals.05-16-2015, 10:02 PM. Have had a continuing prob with 2002 90hp Yamaha-. dies at 3500 rpm. Cranks up & idle's fine. Run for approx 10 min at 3500 rpm motor "bogs" down, did not stall, but runs at idle very rough, I can let idle or shut down for a few min & it cranks up fine, run at 3500 rpm for awhile ,than will do the same thing. I just had my first dt25 die on my after 26. May 15, 2006. #1. I have a 1996 Mercury 115 ELPTO that runs perfectly. The problem is that when I am running at full throttle the engine suddenly dies. It doesn't sputter at all. It just dies. Then I can fire it right back up and it will do the same thing again. Mar 2, 2008. Messages. 15,640. Jul 23, 2013. #20. Re: Motor won...
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