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 ...27. Aug 28, 2005. #1. Basically my 1996/1997 60hp is cutting out and refusing to restart after being run for a while. I was out and cruising along at about 25knots and I slowed down to stop and put it in neutral and it died and then refused to restart. Had to get towed in. Took it home and cleaned all the fuel system right thruogh and the carb ...8 posts · Joined 2010. #1 · Jul 5, 2010. I have a Yard Machines by MTD lawn mower. I pump the primer 5 times, and it starts every time, but just as the engine is reaching normal rpms, the engine dies. It only runs for 1-2 seconds then dies. I changed the air filter and put a new plug in it, and it still has the same problem.This fouling may result in a weak spark or no spark at all, making it difficult to start the engine. Another factor that may hinder the successful starting of a 2-stroke motor is the lack of a dedicated lubrication system. Since these engines rely on the fuel and oil mix to lubricate their internal parts, it is essential that the right ratio of ...May 25, 2013 · Re: 1986 Evinrude 2 Stroke V6 150 hp starts (with manual help) then dies. Please help I pulled the carbs and cleaned everything with carb cleaner even sprayed inside the lines, pins, jets, everything. It started and ran for about 45 seconds and sounded good but died after. I checked the position of the floats and how far they opened looked good.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.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 ...480. Jul 28, 2011. #10. Re: Engine will not stay running without choking. You can usually buy single guitar strings at a music shop. They are various gauges. The smaller ones are usually $1.00 or less. Made of stainless steel and will last for life. Electric guitar .006 may be about the smallest.Share. Tweet. #1. 30hp 3cyl, cyl 2 dead. 12-16-2016, 07:57 PM. Got a 2001 30hp 3 cyl 2 stroke mshz oil injected. If I pull the plug wire on cylinder 2 there is no change. It runs a bit rough at idle, gets really rough and shakes up until I'm out of the lower rpm range and I presume off the idle circuit and on the main circuit.Disconnect the fuel line from the engine side of the bulb. With the arrow pointing to the side where you pulled the hose off. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. Then, stick your finger on the hose barb. Let go of the primer bulb.Advertisement This is what a two-stroke engine looks like: You find two-stroke engines in such devices as chain saws and jet skis because two-stroke engines have three important ad...Disconnect the fuel line from the engine side of the bulb. With the arrow pointing to the side where you pulled the hose off. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. Then, stick your finger on the hose barb. Let go of the primer bulb.266. Dec 14, 2015. #1. Fired up my new to me 1988 Mercury 200 today for the first time since buying it. Started and runs great but will die if the primer bulb isn't squeezed. Before I bought the engine I ran all new fuel line from the tank, new fuel water separator, and new primer bulb. All fittings double clamped.Mercury & Mariner Outboards . Mariner 9.9 2 Stroke Starts and Runs for Several Minutes Then Dies ... I have a 1996 Mariner 9.9 hp 2 stroke and after running for several months would not start. I rebuilt the carburetor with a new kit with gaskets, etc. I replaced the fuel tank and fuel line. ... Mariner 9.9 2 Stroke Starts and Runs for Several ...My motor starts, runs roughly for a few seconds, then dies. Eventually, it stops running altogether. Just had the - Answered by a verified Marine Mechanic ... but if it's an outboard change the fuel diaphram, and if its an inboard let the fuel run from the pump through a hose back to a safe containior while turning the engine over and see what ...Re: 2 stroke outboard starts but then dies when throttled or idle. Check for air leaks in the fuel supply hose from portable tank to the motor. They’ll either be at the …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.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.It's a Suzuki 4-stroke 2.5 HP (yes, everything is really tiny) from 2008 that came with the boat and sat on the rail idly for 2-3 years, so of course the petrol had gone off. The ignition also had problems, which are sorted now after replacing the all-in-one ignition module. Spark plug is also new. So now it starts, but only runs for a couple ...Items you will need. Johnson manual for your particular motor. Compression gauge. Leakdown tester. Check for simple problems that may cause the engine to run poorly. If your engine isn't starting, check for a loose spark plug wire. Something as simple as a wire not connected properly can keep your engine from firing.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 ...29. Aug 30, 2009. #5. Re: Yamaha 25 4stroke starts then dies. Soaked the carb overnight in carb cleaner. And then reinstalled everything. I primed the bulb until it was hard and it fired up on its own after 10 seconds of cranking and then died again. It idled fine for about 30 seconds and the nothing. After the intial start up the motor would ...The boat runs like a scalded dog but wont idle for nothin. I cleaned the carbs for the third time and it remedies the idle, then after about 30 mins of run time, idle jets get clogged again. It looks like a gel and also a white chalky substance inside of the carb. I dont know where the crap keeps coming from.I have a 2003 Yamaha 50TLRB outboard that has never run correctly from the day we got it last year. It has always had dying, rough idle, low rpm issues and dying when accelerating/ taking throttle. The problems seem to be worse at times then slightly better others. All classic dirty carb symptoms.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.Try the cylinder drop test. Get a plastic pliers and pull the plug wires one at a time off while it is running. If all the cylinders are firing the idle should change as you pull the plugs off. If the idle doesn't change when you pull a plug wire off or you don't hear a snap from the spark. That cylinder is probably not firing.Yamaha VZ150TLRY starts and instantly dies. Last night I changes the VST filter and paper filter in the clear fuel filter on my 2000 Vmax 150 HPDI. I changed it after this past Sunday was on the water and at high rpm's the motor started surging and doing the fuel starving thing. So I ordered the filters and last night went ahead and put them on ...1995 Evinrude 130hp My outboard did not start and did not have any spark/sometimes intermittent spark. So on a hunch i decided to replace power pack (used) and sure enough that fixed the problem. Now it starts, however, it only stays for about 1 minute then shuts off. It sounds like a fuel...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).01-27-2007, 05:56 PM. we have a 13 year old yamaha 175. after running for about 10 minutes, engine bogs down to low rpms, sometimes stalls. runs perfectly up to that point, up to full wot rpm. comes back to higher revs briefly when we pump the bulb. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. any ...Mercury 30hp EFI 4 stroke. Runs for about a minute then dies. Used to not restart until you let it cool for several hours. My customers took it to a master Mercury technicians shop who replaced the fuel pump. ... I have a 2005 Mercury 8.0HP 4 Stroke Auxillary outboard as a trolling motor, it starts and runs perfectly for about 15 minutes then dies.If a motorcycle or ATV only runs with the choke on, it's because the richer "choke on" mixture is actually closer to the engine's normal operating fuel mixture than the leaner "choke off" mixture. So when the choke is turned off, the engine gets too little fuel and too much air for it to run and it stalls.540. May 28, 2010. #3. Re: Mercury 25HP Wont Start. Replace the fuel lines, tank to motor line, and rebuild and clean the carb with compressed air. All pretty cheap. THEN, perform a compression test on the motor to make sure that starting fluid did'nt kill it.If your two-stroke is not starting or else backfiring a lot when it does, this could mean that your fuel pump is clogged or damaged. The fuel pump helps to keep the correct ratio of fuel and air in the engine. When your fuel pump is malfunctioning, there is typically too little fuel being pumped to the cylinders.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 ...Mar 12, 2016 #3. Right after it stalls slowly crack open the fuel cap, if it makes a hissing sound like sucking air. Give your dealer fully detailed info, run time, throttle position, speed/rpms info, key west has many tests and fixes for the problem. My 250 had very similar issues, but quickly remedied by the KW guys.I have a 1994 or 95 150 hp Evinrude outboard that shuts off after about 10-15 minutes. It fires just fine when cold but after running a little bit it just completely shuts off, no sputtering or anything just dead. It will not restart for a while afterwards, After giving it 30-45 minutes it...Tweet. #1. Bogging down under load. 03-04-2011, 12:40 AM. I have a 50 yamaha with 150 hrs on it. When I put it I the water, and put it in gear, I can't get over 1400 rpms. Now if I just use the cold start lever it revs right up. There is a little red lever under air silencer.A good prop dealer will recommend a starting point and will have you try a couple of props to find the best setup for your boat. Running at full throttle at a thousand revs too low could easily be the cause of overheating on this motor. The cooling water pump turns at the same speed as the powerhead and its flow rate depends on the motor speed.the bike starts up and runs for 10-20 seconds then bogs out and stalls. almost like it floods it self out. took it to a local mechanic and no luck. checked timing and every thing else. starts and runs for 10-20 seconds then dies and wont start until 20 min later then the same. compression is 150 cold and warmOutboard engine RPM’s are lower when they are in gear. They can die when put in gear because one or more cylinders may have a problem and are not firing. Once in gear the RPM’s are so low that the engine dies. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem.Re: Why does my outboard start and runs for 1 minute then dies/shuts off? Locate the black/yellow wire where it attaches to the powerpack. Disconnect it. Remove …Mercury outboard motor 2003 90 hp 2 stroke. Starts a runs great, for a while. Then loses power. Never dies, just gets weak. If you pump the ball, it will run well for a couple of minutes. Replaced piugs, fuel filter and fuel lines in motor, but not the lines coming into the motor and replaced the bulb.Mercury outboard won't start after warmed up. My 97-98 Mercury 40hp outboard won't start after it has warmed up. It will start right away and idle when I first put it in the water (every time). It also runs very strong after it is first started. BUT when I go to restart the motor after I have been sitting in a fishing spot, it won't start.Check the Spark Plugs. Remove the spark plugs and check that they’re the correct ones for your outboard. Also, check that their gaps are set correctly and the electrodes are in good condition. Clean and reinstall the spark …Mercury 150 hp XR6, 2 stroke. Motor starts good and runs good. ... 2006 Mercury 2 stroke outboard stalls after running and returning. 2006 Mercury 2 stroke outboard stalls after running and returning to idle. Won' start for some time after that. ... It fires then dies. ...429 posts · Joined 2011. #4 · Apr 17, 2012. tried it again to move it after it sat awhile. started up once. idled as long as i wanted. i hit throttle and it died. did that same thing 1 more time. then it started and died by itself as described above. then proceeded to not start. battery charger made no difference.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.Some of the reasons why Johnson outboard motors lose power at full throttle includes overloading, overheating, use of bad fuel to oil mix ratio in the 2 stroke variant, use of bad spark plug and faulty ignition system. When these problems occur, the power generated from the outboard motor will be reduced.Re: 2 stroke outboard starts but then dies when throttled or idle. Check for air leaks in the fuel supply hose from portable tank to the motor. They’ll either be at the …Re: Why does my outboard start and runs for 1 minute then dies/shuts off? Locate the black/yellow wire where it attaches to the powerpack. Disconnect it. Remove …Jul 25, 2019 · 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.This basic principle is valid for all marine engines: 2-stroke boat engine, 4-stroke outboard engine, diesel engine, etc. So a combustion engine stalls if: ... If this mixture is incorrectly made due to a lack of air or gasoline, then the outboard motor stalls. This stalling problem is recurrent when accelerating. ... Once the engine is running ...YZ125 Bog then dies at wide open. Bog then dies at wide open. Hey Everyone, I've dug through a bunch of topics looking for a solution to an issue that just started this past weekend. All of a sudden when I crack the throttle wide open it bogs down and dies. If I roll the throttle on smoothly I can ride with no issues.11. Jul 16, 2012. #6. Re: Motor Shuts Off While Running. Well it's back at it, I have a 2005 Mercury 60hp 2-stroke 3 cyl. outboard that cranks and runs fine at idle or low rpms but when I increase throttle and boat to plane it stalls and shuts off, then is very hard to crank, if it cranks at all. I have replaced all fuel filters, hoses, bulb ...Sound-deadened cowl exhaust - Outboards built in the 1970s and prior were much louder. Electronic fuel injection - EFI became more popular starting in the late 1980s; it makes an outboard easier to start and run, less smoky and better on fuel, as well as just a bit better than a carbureted engine when it comes to pollution.When it dies out, if I manually squeeze the primer bulb it will often fire back up. ... Does the level of the 2 stroke oil affect the operation, in example I know the generator on my motor home will shut down when the oil is too low. ... 1995 90 HP Mercury Outboard - runs for a while then shuts down New developments in regard to this. After …Jul 19, 2017. #1. I got one of those dreaded 2000 Mercury 90hp four stroke outboards on my nitro. Starts and runs great at first. Will perform normally until gets warms (around 15 mins of run time). Spits and sputters, won't idle, dies, can restart with full throttle as it floods out once warm. I let it cool for 20 mins and it starts and runs ...4. May 15, 2014. #1. My 50 HP Mercury will only run at half throttle. I have replaced the powerpack, coils and trigger but am still only getting half throttle. I tested the voltage on my powerpack and am getting 295 volts from the stator side and around 150 from the coil side. The compression on all four cylinders is around 130 psi.Have an older (90's) Yam 8hp outboard 2cylinder, 2 stroke outboard. She will start very easily - pull choke out, prime bulb, throttle open to the "start" setting (about 50% throttle), couple of pulls and she starts. However no matter what I do she will not run below around this 50% throttle setting.. Jul 29, 2010. Messages. 2. Jul 29, 2010. #1Reeds. Minute amount of water in the fuel. Dirty carb, debris clo Feb 19, 2018 · In under two minutes, you could learn how to solve the problem for good! This helpful YouTube video by Succstrat explains what might be affecting your ability to get going. The way you have your primer bulb mounted could be your issue—and even if it isn’t–this guy’s accent and deadpan delivery are worth watching! Boat Fuel Problem.It as if its loosing 2 cylinders of spark. The motor is literally jumping up and down back and forth. You fear it would rip right off the transom. It runs great and still planes at about 2400-2800, so this is the speed we cruise at to our destination. If you try turning it off and back on any time in early on in the trip. The symptom is the same. "Have a 1980 model Johnson 70h "Have a 1980 m It as if its loosing 2 cylinders of spark. The motor is literally jumping up and down back and forth. You fear it would rip right off the transom. It runs great and still planes at about 2400-2800, so this is the speed we cruise at to our destination. If you try turning it off and back on any time in early on in the trip. The symptom is the same. 10-08-2015, 08:34 AM. My 2004 Yamaha 40hp outboard loses p...
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