As soon as I give it revs the choke automatically disengages & the engine stops straight away. I have a Honda 8 HP Gasoline engine the model is GX240-242 Serial Number GC04-4490879. But it’s far from healthy sounding. tried another carb & still the same. Curing 2-cycle Engine Problems: ... but the valve closes when the pressure in the crankcase rises as the piston is on the downward stroke. Engine is a 190432-3121-01 Only runs on full or 90% choke Work done: major rebuild = New valves New rings Honed cylinder Complete carb kit rebuild: new gas filter, new lines, new gas tank. As soon as I full the trigger, it cuts off. 2-Stroke Engine Only Runs on Choke (Will Not Run) Why? The engine runs high and clear but bogs down under load and won't ... hey i was reading this thread and just needed some more help. Get shopping advice from experts, friends and the community! Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. Our repair and symptom guide will help you identify the problem and how to fix it. If your lawn mower only runs with the choke on, check the carburetor. My Lawn Mower Will Only Run on Full Choke To understand this problem, you must understand a little about how a carburetor works. Another prominent sign for clogged pilot jet is power loss in the engine that makes your ATV only run with the choke on. engine only runs with excessive choke Troubleshooting. WHY your motorcycle only runs on CHOKE. So up until today the engine/carb has been running normally: Put choke on to start, start engine, move choke to off or open position..all is well. I have it backwards then and kills my idea that choke needs to stay on for it to run. Since you just got the engine done I would double check the carburetor. Share This Post. When I got a can of new fuel this year, it would start and run while I had the choke on, but when I tried to take the choke off, it would simply die. If you are confident that you've got the carb in good shape (which would obviously be the first culprit) I would suggest an air leak, maybe where the carb goes in the manifold. Now I don't have to run it with the choke slightly on. Symptoms can be similar to what you are describing. This afternoon I went to mow the lawn.. Engine would only stay running at half choke… I found the filter by accident and cleaned them. One cause could be an air leak on the carb, head gasket, crankshaft seal. Didnt help I have a Jonsered GR50 brushcutter/strimmer which will only run on choke. Some times a back fire into the carburetor will blow a pressed-in BB out of a drilled passage way. congats, it should run. I thought this engine sounded cool with the lumpiness, but it is a 4 stroke engine. So, fuel hose isn’t out of this circle. As soon as I move the choke lever to Partial or fully Open, ... #2b, non hardening, and the engine runs much better. new float. ENGINE ONLY RUNS ON CHOKE This problem is usually common with Briggs and Stratton Vacu-Jet and Pulsa-Jet diaphragm style carburetors. If engine is hot, ensure that the choke lever is down. On full choke it runs about 75% of full throttle. The engine starts well but will only run on full choke. Otherwise, the engine has ports without valves. The car now will only run with Full choke, as soon as I let out of choke it sputters and dies, I checked the timming and it is fine everything seems to be good but still wont run with out choke. 2 stroke carb's are very easy to work on, once you understand how they work. If the engine only runs with the choke full on it means you have a vacuum leak and the engine runs too lean with the choke off. Lawn Mower: Only Runs With The Choke On . I had 2 honda mowers that only ran on choke and I swear I disassembled each carburetor 3 times. That is with throttle full open. The problem now is that it only runs with the choke fully closed. my 2 stroke blower only runs on idle or full choke. The other could be a clogged low speed and idle circuit. As soon as I give it revs the choke automatically disengages & the engine stops straight away. Still hard time to get started. If I move it off of full choke … This top information is for carburetors installed on Sprint, Classic and Quattro 3.0 to 4.0 hp engines. Posted: 23:38 - 16 Apr 2013 Post subject: Two stroke only runs on choke Right guys, it's late and I've just come in from putting the finishing touches to a rejuvination of an old TS250ER. It doesn’t, quite, die. I'll put my money on a dirty carb. With spring right around the corner, you may be itching to start up your motorcycle and get some riding in. Unfortunately, we hear this question asked more often than ever before. Posts: 7 Re: 79 ez go 2 cycle only runs with choke on. So then I would let it run on full choke for about 3 minutes to warm up, then push the choke in to the off position, then the quad would immediatley stall. But once running, it only runs with choke. The 2 stroke design has only … Good luck Dave 05-14-2012, 07:51 PM #7: Waterman33333. Albeit a bit roughly. Step Four. But, here’s the deal breaker, it ONLY runs well with the choke set. When I push the throttle forward to full power, it actually slows down and sputters. However, you start it up on choke and everything is fine until you turn the choke off, and the engine dies. However, a clogged pilot jet will reduce the fuel proportion in it. Thanks Bad/broken fuel hose may cause the poor supply of fuel or dirty fuel to the engine that’s why the engine needs the choke on to run. It didn't run very well, and every time I gave it some gas the engine just cut out. If you need specific repair instructions related to your model, … A restricted fuel line will usually result in an engine that runs well until the fuel restriction becomes too much. ... Had a bike that would only run ok with that - after trying lots of other stuff, fresh fuel sorted it. We do not recommend that any type of outdoor power equipment be operated after initial warm-up and with the choke control outside of the normal run position for longer than 5 minutes. Already replaced gas/oil with new mixture containing stabil and cleaned the carberater. Scenario's that could possibly make it run poorly would be (usually you only need very minor adjustments after step 2 because that is generally the setting that works on most engines.) I just installed a torker 289 and a edelbrock 1405 600cfm carb on my 302 HO. The choke is literally an extra air hole opening up. Although it may have something to do with your E3 Car Spark Plug , it is more likely the result of using E10 gasoline, especially if you live in a hot, humid area of the country. My Tiller is only running with the choke on. That's too rich. Remember, when your Poulan chainsaw runs only with choke on, it surely has a fuel issue. tried another carb & still the same. When you place the choke in the on position, it creates more suction on the throat of the carburetor which creates more vacuum to pull fuel out of the main jet and up through the emulsion tube which mixes air and fuel. Do not see any fuel adjustment on Carb. Dwight Coleman there are usually only a few possibilities if it only runs with the choke. You will not know if the BB is missing cause it will look like another hole in the carburetor. Google+ 0. And the engine runs! 1. Facebook 0. 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 . Very simple Mariner5 air-cooled 2-stroke runs fine on half-choke , dies on anything less. I left my choke on whilst riding a 125cc bike and within minutes it had overheated and slowly lost power until it died, with bluish smoke coming off the engine casing – user90843843434 Apr 26 '15 at 17:17 Re: Engine only runs with choke on Ok, this seems to be my confusion. You need to richen your mixture. 2 stroke engine will only run on choke.? Either fuel-supplying components are faulty or carburetor itself. I have a typical small engine power washer which was running fine the first day I used it this year even on the old fuel. I have taken the muffler off & it was well choked up with coke but after cleaning it's still doing it. If it runs ok with choke on, but dies with no choke, then your mixture is too weak. A.The diaphragm is stiff and must be replaced. Twitter 0. 2: Possibly flooded engine (Excess fuel inside engine): This can occur if fuel valve is left open while engine is off for long period.Turn fuel to off position and try starting engine with throttle wide open. Why Does my Small Engine Run Better with the Choke on? Starts on first pull but, leans out and dies if I take off choke. Engine requires a good mixture of fuel and air to operate correctly. I have a Jonsered GR50 brushcutter/strimmer which will only run on choke. The ONLY way to keep it running with no choke was to sit there and give it some throttle and even this was very hard to get it to stay running, the second you let go of the throttle at all it would just stall. Bike looks great but only managed to get it running with the choke full on, 'ticking over' at 4k revs. Original 1964 Kohler K181 engine on a 1964 864 Wheel Horse. Tiller is only five years old and is used maybe at most 4 times a year. i to am having the same issue of only running with choke on. Its basically the same as opening up the throttle plate itself, only you aren't exposing the needle or main jet. It runs great now, and accelerates better, and smoother. If the float is older, it can get heavy and it does not float. If I open the choke it will shut down immediately. If the engine runs only with full choke, you know it is not getting the gas it needs. That is your starting point.

I'm also becoming a firm believer in the need for fresh gas -- based on recent experience. Not Yet Wild . Symptoms : Check: Engine Won't Start: 1: Carburetor choke: If engine is cold, ensure that the choke lever is up. I have taken the muffler off & it was well choked up with coke but after cleaning it's still doing it. Look at the spark plug, and see if it's black. Any help much appreciated. 5. try equally turning both screws down as low as they can go without killing the engine, then do step #4 again. It purrs on idle then; however, if I give it any major throttle in my barrel, it Boggs down quite a bit. It will result in a less efficient engine. I once accidentally overdosed my fuel with Seafoam and the engine would only run with the choke until I drained the tank. If some petrol is getting through, then closing the choke may bring things back into balance sufficiently to run the engine - sort of! Join Date: May 2012. 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It only runs with choke on, but dies with no choke, you know is... 4K revs is GX240-242 Serial Number GC04-4490879 how a carburetor works the float is older, it can heavy! Stroke carb 's are very easy to work on, it only runs with the choke.! Classic and Quattro 3.0 to 4.0 HP engines. it running with choke my Mower. Your motorcycle and get some riding in if your lawn Mower only runs on idle or full choke accelerates,!