Engine cuts out when throttle opened

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Engine cutting out when open throttle. YAMAHA NEOS 50cc MOPED. The engine will start ok and tick over fine. However, either soon after starting to set off the engine looses its revs and cut outs, OR will run just for a few minutes then again when open the throttle (loading engine) to accelerate or go up incline, it starts to splutter then cut outs. Either way immediately after breakdown the engine will not start again. Oct 03, 2017 · After that it got to where it'd only run for about 5 min or so before dying. Then I'd have to choke it and crank hard on the starter to get it to fire up again. I've replaced the fuel pump (as it was full of junk inside). Now it starts, idles, and runs great until I open up the throttle to get up some hills, then it sputters and cuts out. Video how to fix 4 stroke high revs engine problems. This engine was cutting out at the high revs. The video will demonstrate how to quick fix the problem wi... Dec 26, 2012 · As far as I know there is nothing that can be wrong in the area of ignition, given that its a single sealed unit, and its in a fixed position with no adjustments possible. It fres up immediately and only stalls when the throttle is opened. Oct 03, 2017 · After that it got to where it'd only run for about 5 min or so before dying. Then I'd have to choke it and crank hard on the starter to get it to fire up again. I've replaced the fuel pump (as it was full of junk inside). Now it starts, idles, and runs great until I open up the throttle to get up some hills, then it sputters and cuts out. Engine cutting out when open throttle. YAMAHA NEOS 50cc MOPED. The engine will start ok and tick over fine. However, either soon after starting to set off the engine looses its revs and cut outs, OR will run just for a few minutes then again when open the throttle (loading engine) to accelerate or go up incline, it starts to splutter then cut outs. Either way immediately after breakdown the engine will not start again. Sep 01, 2004 · This portion of the idle circuit introduces additional fuel into the engine as the throttle is opened to admit more air. ... to lean out the engine for curb idle. ... pulls air from four slots cut ... A couple of things i'd check is, make sure your exhaust is free and clear of carbon build up....pull your muffler off the engine and check exhaust ports if carboned up....clean them out with a small screw driver and some spray carb cleaner is what i use and also clean or replace the spark arrester if it has one i use a small torch to burn the old carbon off..can use chemical to clean arrester's but it takes a lot of time ....make sure not to scratch cylinder wall or piston while cleaning.... Video how to fix 4 stroke high revs engine problems. This engine was cutting out at the high revs. The video will demonstrate how to quick fix the problem wi... Leaf blower starts but cuts out when throttle is opened - Answered by a verified Technician We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. When 2 stroke engine troubleshooting and the engine is flooded, you want to spin the engine over fast with the throttle wide open several times. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly. Sep 04, 2016 · Yes I want to to open up the throttle butterfly , slowly all the way. When you engage the blades the engine slows and the butterfly opens up to compensated for the slow running engine. If there is a fuel supply restriction or air leak when the throttle is fully open the engine starves out but from what you have said so far it really sounds electric Jul 31, 2009 · Maybe it loosened up - which would allow the engine to idle normally, but would severely enrich the mixture as you opened the throttle - leading to a lack of power. Make sure the exhaust port is clear from carbon deposits (although it takes a lot of running time for them to build up at the exhaust port), and make sure the muffler is clear. If the engine cuts out during a stop, with the transmission placed in neutral or park, the engine fires up again, but dies again when approaching a final stop. Other symptoms can include intermittent difficult starting, a slight stumble when the accelerator pedal is nailed while the engine is turning around 1,000-1,500 rpm and/or annoyingly ... Jul 05, 2011 · The small engine repair place donw the road stated it only take a little of the ethanol "improved" gas to really screw up the piston and rings. True? Now for this year..... starts with the few presses on the bubble primmer and a few pulls. But when it is running as soon as I lightly press the throttle it dies and stops running. With the choke out she idles at 3,000 - 5,000 revs depending upon exactly how far out. Once she's warm she idles just fine with the choke in, at 500 - 1,000 rpm. But if I open the throttle to rev the engine, there's a very short burst of revs, for maybe half a second, then the engine cuts out. This happens with both the choke in and out. With the choke out she idles at 3,000 - 5,000 revs depending upon exactly how far out. Once she's warm she idles just fine with the choke in, at 500 - 1,000 rpm. But if I open the throttle to rev the engine, there's a very short burst of revs, for maybe half a second, then the engine cuts out. This happens with both the choke in and out. I have a '14 1000 and at a ride last weekend it started cutting in and out at full throttle. It starts around 6500 RPM and keeps gaining RPM into high 7000's but is cutting in and out the whole way. Won't cut in and out at half throttle or less but anything past that and that's when it starts... So you need to be richening or leaning out your fuel mix at the high speed needle, and again, which one you need to do depends on how your engine is dying. Running a couple of laps at wide open throttle (or trying to) should make it clear enough. Sep 04, 2020 · Engage the parking brake, start the engine, and let it idle. Pop the hood open. Wiggle the battery cables, including the small wire that connects to the car's body, if your vehicle has one. If the engine shuts off and the headlights stop working while you do this, you are dealing with a loose, corroded or frayed cable or wire. So you need to be richening or leaning out your fuel mix at the high speed needle, and again, which one you need to do depends on how your engine is dying. Running a couple of laps at wide open throttle (or trying to) should make it clear enough. I throttled down then when I went to trottle back up it sounded really boggy. At full throttle it was doing between 5 and 7 knotts! I switched the outboard off then restarted. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. Jul 29, 2020 · Just remember not to shift back into neutral, or the engine will cut out again. And obviously, shifting this fast can be hard on the engine; it’s okay to do it once or twice to save the day, but before taking the boat out again get that valve fixed. The engine ran fine for a while, but then it shut down and won't re-start. When the throttle is opened all of the way the majority of the fuel flows through the main jet. Some fuel will also enter the carburetor through the idle and transition circuits at full throttle but not nearly enough to sustain combustion on their own. If the engine will idle but dies at full throttle the main jet in the carburetor may be plugged. I throttled down then when I went to trottle back up it sounded really boggy. At full throttle it was doing between 5 and 7 knotts! I switched the outboard off then restarted. When I pull off slow, it pulls off fine but as soon as I put throttle on it bogs down and cuts out. Oct 03, 2017 · After that it got to where it'd only run for about 5 min or so before dying. Then I'd have to choke it and crank hard on the starter to get it to fire up again. I've replaced the fuel pump (as it was full of junk inside). Now it starts, idles, and runs great until I open up the throttle to get up some hills, then it sputters and cuts out. Sep 01, 2004 · This portion of the idle circuit introduces additional fuel into the engine as the throttle is opened to admit more air. ... to lean out the engine for curb idle. ... pulls air from four slots cut ... Dec 26, 2012 · As far as I know there is nothing that can be wrong in the area of ignition, given that its a single sealed unit, and its in a fixed position with no adjustments possible. It fres up immediately and only stalls when the throttle is opened. The reason for this is it being a 2-stroke engine. Most 2-strokes are not very efficient and will burn part of the air/fuel mixture as it's leaving the exhaust port. You're most likely just seeing the burn. A couple of things i'd check is, make sure your exhaust is free and clear of carbon build up....pull your muffler off the engine and check exhaust ports if carboned up....clean them out with a small screw driver and some spray carb cleaner is what i use and also clean or replace the spark arrester if it has one i use a small torch to burn the old carbon off..can use chemical to clean arrester's but it takes a lot of time ....make sure not to scratch cylinder wall or piston while cleaning.... I have a '14 1000 and at a ride last weekend it started cutting in and out at full throttle. It starts around 6500 RPM and keeps gaining RPM into high 7000's but is cutting in and out the whole way. Won't cut in and out at half throttle or less but anything past that and that's when it starts... It cuts out at the lower throttle settings (5% moon open) and medium (20% moon open) and slightly higher (40% moon open). I have not tried at higher settings. Sometimes it cuts out immediately and sometimes it lasts for 5 secs or so. Glow plug is giving nice orange glow. My engine has a total run in time of about less than 15 min in total. Engine cutting out when open throttle. YAMAHA NEOS 50cc MOPED. The engine will start ok and tick over fine. However, either soon after starting to set off the engine looses its revs and cut outs, OR will run just for a few minutes then again when open the throttle (loading engine) to accelerate or go up incline, it starts to splutter then cut outs. Either way immediately after breakdown the engine will not start again. Sep 04, 2016 · Yes I want to to open up the throttle butterfly , slowly all the way. When you engage the blades the engine slows and the butterfly opens up to compensated for the slow running engine. If there is a fuel supply restriction or air leak when the throttle is fully open the engine starves out but from what you have said so far it really sounds electric Leaf blower starts but cuts out when throttle is opened - Answered by a verified Technician We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Sep 01, 2004 · This portion of the idle circuit introduces additional fuel into the engine as the throttle is opened to admit more air. ... to lean out the engine for curb idle. ... pulls air from four slots cut ...