Engine Dies When Choke Is On

I can keep [the Yamaha 8-HP motor] runing by choking and working the throttle. Difficulty Scale: 4 of 10. When i start my car it idles rough and then dies. Choke engine until it starts to fire and then open the choke. Minimum Air Adjustment. OK, tore the carb down, there was just a couple pieces of crud in the bowl, and the infamous varnish smell. Carburetor For MTD 478-SU Engine. 3) Replace the power valve. I went in abut a month ago and got it to start up without too much cranking. the engine may be weak, but the two stage pump may be set too high before it unloads. Once started the throttle is very tricky, too much throttle and the engine dies, and/or 3. Re: Engine stops running when switched to run. Why does your Honda gx160 stalls when you back off the choke? Answer. For info specific to your carb, we recommend that you purchase the proper repair manual for your engine. It then starts sputtering and dies and will not restart until I let it sit for awhile. I have a 6 yr old Craftsman riding mower with a B&S 31H777-0297-E1 engine with a Nikki carb. 2000 Mini Z stalls when choke pushed in - posted in Mini Z/ Mini REV: Hi! Sled was running good this summer/fall. When Im slowing down and rowing thru the gears down to a stop, when i depress the clutch with the a/c on the engine dies. Once it had warmed up sufficiently I pushed the choke in and the bike dies. 0L) and LO5 (5. spark plugs turning black and engine dies If this is your first visit to 3WHeeLeR WoRLD, please take a moment and look around. If you saw the pilot mixture screw, it should be one turn out from fully in. If a loud bang accompanies the sputtering, especially when the car accelerates, this indicates a problem with the exhaust system. Lawn mower engine surging is a right pain in the Jacksie, it's an engine that runs erratically, revs up and down by itself uncontrollably. Engine starves for fuel at high speed (leans out). Yes the air/fuel mix should start at 1 1/2 turns out. All Powermate portable generators are designed and tested to the highest standards. See the above section on vacuum hoses. I have a 2004 Polaris Sportsman 400. It usually starts OK, but it won't run if the choke is released. When the engine becomes warm, the lever goes out of CHOKE and moves into FAST with a fully. If I release the trigger, let it idle for a few seconds or so, I can pull the trigger and get another 10 seconds out of it. My friend said [the cause of this problem] is more than likely a jet. See our Technical Resource Center. The 1998 Jeep Grand Cherokee has 7 problems reported for engine stalls/shuts down while driving. Honda 25cc mini 4-stroke engine Runs on straight, unleaded gas (no mixing) 17" Semi-matic (bump feed) head with Ultra Quiet® line Durable flex shaft with lifetime warranty. Help please - chainsaw starts fine but dies when given gas. Because of this, the following can occur: 1. Honda Black Max 2600 PSI Pressure Washer. Jiggle the carburetor to set the choke spring. The choke was closed all the time. They will tick over for a while longer but as soon as I touch the throttle they die. Started engine choke in Full position and when moving it halfway engine still runs, but turning it off it stalls shuts off. I have a Honda GCV160 engine on my mower, which all of a sudden stopped running unless the choke is on. In this situation, you can usually re-start the engine once it has had a chance to cool back down and it'll run just fine until it warms-up again and stalls. Stalls every time I take the choke off. I failed to mention that when it is running with the choke, it runs very fast. Engine dies when decelerating with A/C on So I used the A/c for the first time this year and have discovered a problem. The one that came with the Rubicon was always hard to start. Average repair cost is $420 at 86,250 miles. You may have put the base gasket on wrong or it is the wrong one for this carb & engine combination. Manuals Library. Remove the aircleaner, peer into the carb throat with the engine off. engine dies when choke is pulled on 03 pred I bought an 03 pred about 2 months ago. I hope something in this helps. Re: Engine dies when given gas Is it a 2 or 4 stroke engine, for 55, it has to be a 2 stroke Euro mini moto racing bike or On X super pocket bike X15, X18 etc. Children, however, tend to choke on not only food, but toys and other household items. on the alternator wiring ther is a wire that is only hot when the engine is running and works really well , at least for me anyway, i use this wire because if the engine dies before the car/truck dies before it warms up the electric choke wont continue to heat the choke coil,which was a chevy design flaw. Immediately upon turning off the choke it dies. The bike often sputters and dies after I stop at a stop light and then take off. The engine starts up quickly. 2002 Will start with choke on, then dies when choke is off Hello, I had my carb rebuilt about 2 1/2 years ago. No, I can't keep it running with throttle, I can get maybe one twist off and it dies. i figure there must be a safety or something thats not working correctly, but im not sure where it would be. THANKS TO the suggestions about the main jet I pulled it and cleaned the small hole with a fine copper wire. If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members. I think it's more likely that you have leaky manifold gaskets. I can't for the life of me figure out whats wrong. If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle trigger, something is interfering with efficient fuel combustion. From a number of different sources, Dave has learned that the engine stumbling on acceleration (especially when accelerating through a corner) may be due to one or more of the following (in order of ease of repair) - There may be water in the. Runs one or two air conditioners with power to spare. I have a two year old 5hp Honda enigne on a Troybilt frame. When the engine is cold the automatic choke is in operation and that can change the idle speed. I put fresh gas in it and kicked it over and let it run at idle for about 10 minutes. In some cases it may only happen under certain conditions, for example only after the mower gets hot, or only when the fuel level gets low. From a number of different sources, Dave has learned that the engine stumbling on acceleration (especially when accelerating through a corner) may be due to one or more of the following (in order of ease of repair) - There may be water in the. it seems like it is starving for fuel. Scooter dies/stalls when warm/hot after about 3 miles and won't start until cold. First making the term clear the choke is the essential part of the carburetor fitted bikes. When choke is pushed in the engine shuts down. It used to start on the first pull. If I push the choke in at all to bring the idle down, it dies. If the choke is stuck in the open position then it will be creating a lean condition rather than the rich condition we need when an engine is cold and consequently stalling. Got my first experience last fall rebuilding my dad's golf cart engine. Hi all, I have a '76 that i have been working on for a little while. I check the throttle kill switch under at the throttle it is working properly. Common reasons for this to happen: Malfunctioning transmission: In a car with an automatic transmission, the torque converter takes the place of the manual clutch and is responsible for transmitting power. Pulled the carb off. It's driving me mad. (MTD Snow Thrower) - Getting all my things in order for winter, and the snow thrower dies as soon as it comes off choke. Re: Engine stops running when switched to run. Children can choke on peanuts. GM Throttle Body Injection 1987-93 LO3 (5. If its fully on the engine stalls. Re: cart only runs with choke Ok, it's right back to the same problem. Just had to open it up some. I have fuel going to the carbs and can start the car by pulling the manual choke when cold like normal, but after the car warms up and I open the choke fully the car starts to idle rough and dies out almost like it's getting too much fuel. A ductile substance is one which is capable of being drawn into wire. 3) Ford& Holley Only. Riding Mower Dies When It Accelerates. A clogged carburetor is usually the culprit when the engine stops after running a few seconds or more. Engine stalls when choke open - posted in Engine: Hows it goin Just a quicky I got the initial timing sorted on my 253 UC so the thing starts. Choking Infants and Children Choking is one of the leading causes of unintentional death for infants, who require a different rescue procedure than adults. In an internal combustion engine, the throttle is a means of controlling an engine's power by regulating the amount of fuel or air entering the engine. Once it had warmed up sufficiently I pushed the choke in and the bike dies. When the blades on a lawn mower come under full load, such as when cutting thick or tall grasses, the carburetor responds by increasing the amount of fuel flowing into the cylinder. 4) Check out entire fuel system venting. Only runs when choked. However if it still dies even with the choke on then its the diaphragm in the carb (acts as a fuel pump) Posted 5 years ago. Also, when you start it cold, it idles just fine for exactly 30 seconds, then either stalls or starts running rough, then dies. If you choke, or if something chokes you, you stop breathing because something is blocking your throat: She choked to death on a fish bone. The point of a choke is to enrich the fuel mixture, so a cold engine starts smoothly. Are there any loud sharp noises coming from the carburetor? A. Like I stated before It fires right up and idles fine untill the choke opens and then stalls and dies. It's a bit older and other than having to leave the choke on, it works just fine. car run with choke on but dies when off and pass it over the carb then open the choke, if the propane keeps the engine running that will confirm the need to plug. thanks, ian. When I re-installed the carb now the only way the tractor will idle or run full throttle is with the choke fully closed. As soon as I push the choke in, the engine dies. on the alternator wiring ther is a wire that is only hot when the engine is running and works really well , at least for me anyway, i use this wire because if the engine dies before the car/truck dies before it warms up the electric choke wont continue to heat the choke coil,which was a chevy design flaw. When I start the engine cold, choke is fully open and gradually steps down on the choke cam as designed. Common reasons for this to happen: Malfunctioning transmission: In a car with an automatic transmission, the torque converter takes the place of the manual clutch and is responsible for transmitting power. Shop online for all your home improvement needs: appliances, bathroom decorating ideas, kitchen remodeling, patio furniture, power tools, bbq grills, carpeting, lumber, concrete, lighting, ceiling fans and more at The Home Depot. This, again, is how many bi-metal springs are burned up, because there is no airflow through the choke housing when the engine is not running. 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. I posted a while back that my generator wouldn't start. Engine overspeeds. When it comes time to get serious work done in the yard, you'll want to make sure you have a heavy-duty garden tractor on your side. If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members. I have heard of a rotor got its whole blades torn due to surge. It may be necessary to replace the pilot jet, but try the mixture screw first. I thought maybe the choke was stuck, but if I pull out on the choke at all when its idling, it dies right away so I think the choke is still working fine. Then sea foam. its got fresh gas and I run a 35 to40:1 mix on all my 2 stroke motors. During the process, if the engine's speed doesn't drop, it clearly indicates a problem with a spark plug or wire. 2006 nytro I just started the sled for the season and the engine stalls when I shut off the choke. protex hand brake shoe set suit toyota prado grj kdj kzj series 2000-2009 n3157 - protex. The choke restricts the amount of air going into the carburetor, thereby causing a richer air/fuel mixture that is needed when the engine is cold. As the engine warms, the choke opens up, leaning the mixture. also sprayed the carb with choke cleaner. The system is easily checked for leaks by 1) choking the carburetor with the palm of your hand over the throat (if the engine immediately dies, there is no leak), and 2) spraying starter fluid (ether) on every possible leak point and listening for changes in the engine speed as the ether is sucked into the manifold. We have Mercedes Parts for C-Class, E-Class, E320, AMG, S-Class, SLS, and more. Shop with the Experts Today & Find the Snapper Mower of Your Dreams. what should I do to fix. This, again, is how many bi-metal springs are burned up, because there is no airflow through the choke housing when the engine is not running. There are many different types of carbs, but they all operate the same. Turn on the ignition and fuel, put on the choke, open the carburetor throttle 1/8 to 1/4 and hit the starter button or kick start the engine. i figure there must be a safety or something thats not working correctly, but im not sure where it would be. Rubberball/Getty Images You've thrown up the contents of your stomach, but continue to retch. I have a ~1yo Husqvarna chainsaw. But then if you put full choke on again it would idle fine (fast idle on full choke). OK, I'm into unknown territory here. I can have her idle with the choke closed, she will idle up near 1200 or 1300. Observe the pump jet in the carburetor, and with your hand, work the carburetor throttle to the wide-open position. My friend said [the cause of this problem] is more than likely a jet. I can keep [the Yamaha 8-HP motor] runing by choking and working the throttle. - Answered by a verified Technician. Search Cub grocery store, delivery & pickup by store location. By 5 Star Rising, August 21, 2016 in S30 Series - 240z, 260z, 280z. Hi all, I have a '76 that i have been working on for a little while. Then consider registering so that you may make posts, and view the additional content available. What we did was let it sit, until the choke was closed (engine cooled), and tried it again. Adjust choke if necessary. Or air leak or tank filter blocked or main jet blocked. Showcasing Ace Engine Jug available for sale now on the internet. It seems as soon as I pull the throttle the engine dies. also when you put the fuel stabilizer in did you run it for a bit to get the stabilizer in the carb also if not the gas in. Does this mean. spark plugs turning black and engine dies If this is your first visit to 3WHeeLeR WoRLD, please take a moment and look around. My engine runs while on choke, but dies when off choke. Why does the choke help an engine start when it is cold? I know that the choke restricts the air flow and thus makes the mixture of air/gas entering the engine more concentrated with fuel, but why would that make it easier for the engine to start on a cold day? Shouldn't the engine be easiest to. Has newly rebuilt engine (2009) recently rebuilt holly 4bbl carb, new fuel filter, fuel lines and an electronic fuel pump. Runs pretty good and putting out 123V with it on semi-choke. Riding Mower Dies When It Accelerates. So basically it WILL NOT run without full choke, and even with full choke on I still can't ride the thing because as soon as you give it throttle with full choke on it will stall, I guess it gets flooded with gas. Engine starts with choke on, but stalls with choke off. Engine bogs and will not go beyond a certain RPM. Same thing: ran, rough but ran, until the thermowax opened the choke. Then attempt to start the engine without choke. Another (maybe) weird thing--after letting the bike idle for about 10 minutes, my stepdad turned the fuel supply off and left it like that for a few minutes and the engine kept running. Its not a go anywhere 4x4 as it doesnt have a low ratio gearbox as some of its bigger brothers the Defenders and Range Rovers. The GM ignition is electronic and very reliable. The plugs are showing a rich mixture but i would assume this is from the choke being on. Carburetor incorrectly adjusted Readjust carburetor to factory break-in settings and tune your engine for performance. If I put the choke on it will pick up and accelerate again. I just got around to flushing out the tank and carb bowl, added some fresh gas and additive. My yard machine riding lawn mower with a 17. 5 HP Tecumseh OHV XL/C engine. Even after I allowed the engine to warm up, the engine dies when pushing in the choke. However if it still dies even with the choke on then its the diaphragm in the carb (acts as a fuel pump) Posted 5 years ago. Now it stalls if I don't keep priming it ("Mega Choke"). When I move the choke to "Off" the engine seems to maintain rpm (maybe a slight increase but not like when I move it to "Auto") and dies within 2-3 seconds. If the choke was used to start the engine, move the choke control cable so that the choke arm moves to the OFF position as soon as the engine warms up enough to run smoothly without use of the choke. 1966 inline 6 engine bogs down and stalls out when accelerating from a start This topic looks it has been talked about alot, but I just can't fix it. There are quite a few differences in the operation of 2-stroke engines compared to 4-stroke engines (which were covered on the Basic Small Engine Repair page). It starts fine and runs fine for about 4 -5 minutes then starts spitting and sputtering. Turn it out 2 turns and start your engine at 1/4 throttle letting it warmup for about 30 seconds with the glowdriver still on. 240z dies when choke is fully open. Mower info: Craftsman 917 255736 Engine info: craftsman B&S model: 252707, type: 0621-03, code: 36040111. Okay, that's what the manual refers to as the "Throttle Stop Screw Knob". It starts right back up at 1/4 to 1/2 choke but as soon as i flip the lever past 1/4 closed, it stalls out. I really appreciate everybody's input. Happy Motoring!. ENGINE STARTS AND DIES, SURGES, OR WILL ONLY RUN ON CHOKE. It won't idle down. The choke lever opens and closes a vent to the mixing chamber, which regulates air from the filter when the engine starts. If you ease on the gas, it will actually run pretty smooth. If pressure rises too high on high flow before unloading the large section, then it draws too much hp and stalls the engine. When you spin it over, the engine develops a vacuum which pulls air through the carburetor. It happens when engine is both cold and when it's warmed up, and it kills the motor instantly. Register Log In OutdoorKing Repair Forum Forums Questions on Trimmers and Brushcutters Two Stroke Trimmers & Brushcutters Ryobi trimmer stalls when taken off choke: Forums Calendar Active Threads Search Forum Help. As soon as I moved the choke, the engine died, in a matter of seconds. I have a pressure washer, that i start with the choke on. Check for codes first just in case. Engine dies when the choke is open. See our Technical Resource Center. Engine will run if choked. The 2005 trx300ex fires right up with the choke on let her warm up, turn choke off and she dies. When the choke is closed, it provides the engine with a mixture rich in gasoline for startup. It starts right back up at 1/4 to 1/2 choke but as soon as i flip the lever past 1/4 closed, it stalls out. A ductile substance is one which is capable of being drawn into wire. The problem we have had all along is that it still dies when going into drive. The odd part is, both times, when I got home, I flushed the engines, and on the trailer it doesn't seem to bog or choke out. It runs good and bad like this and almost dies, but usually catches and goes again. If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle trigger, something is interfering with efficient fuel combustion. I can't even push the choke halfway in before it sputters, becomes gutless, and dies. Intake manifolds, camshaft kits, cylinder heads and carburetors are the core of the Power Package. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. If pressure rises too high on high flow before unloading the large section, then it draws too much hp and stalls the engine. If it stalls on the highway, you could be involved in a very serious accident. You say the engine runs, then dies three times what happens if you close the choke when it starts to die? Will it pick back up and try to run, or go ahead and quit? If it dies even when the choke is closed, I would suspect insufficient fuel flow from the tank to the carb, or an overlooked ignition problem. Tecumseh 5 HP Gas engine ( Stalls when choke is turned off) Hello, Purchased a new carb from Jacks small engine. - Answered by a verified Technician. Since the early 1980's, the Edelbrock Total Power Package System has solved the parts matching puzzle for many street performance enthusiasts. If I hold the choke half way with my finger it will smooth out for another minute but starts spitting again and dies. When the gear is engaged the engine dies. Motorcycles. With Honda's system, you can intervene in a number of ways. Out of gear she revs fine. By 5 Star Rising, August 21, 2016 in S30 Series - 240z, 260z, 280z. last night i was try using 17. So basically it WILL NOT run without full choke, and even with full choke on I still can't ride the thing because as soon as you give it throttle with full choke on it will stall, I guess it gets flooded with gas. Other signs that the choke may be set wrong include the vehicle dying at low idle or revving high and then dying. protex hand brake shoe set suit toyota prado grj kdj kzj series 2000-2009 n3157 - protex. Find Expert Advice on About. The odd part is, both times, when I got home, I flushed the engines, and on the trailer it doesn't seem to bog or choke out. The front handlebar controls are, from left to right; hand-grip and rear brake lever switch, parking brake lock lever, reverse button, engine kill switch, light switches, choke, starter button and auxiliary 12 volt receptacle. If the engine does start when hot, but stalls after a few seconds, again, the choke may be stuck in the closed position. When I open the Choke 1/3th everything is normal when opening throttle gear engaged or not. When it is on full choke it idles very high. 2) Big vacuum leak on engine somewhere. It's a bit older and other than having to leave the choke on, it works just fine. However, Ive run into a problem I cant seem to fix. 9N only runs if I choke it- whats wrong!! discussion in the Ford forum at Yesterday's As soon as I open the choke, engine dies. My choke remains completely open and the throttle/air fuel control in the carburetor is what is moving, when it hunts or bogg's down, the throttle seems to be closing off the air supply (a lot like what a choke does) then opens back up. Pull out the choke adjustment knob and restart the engine if it stalls when attempting to mow. The choking can be unstable - the flow can restart, and re-choke continuously, creating very violent vibrations to the engine. I have a snow blower with an 8 HP Tecumseh on it. If not, the engine could seize and stop. Engine stalls on throttle up. This only happens after a cold start. Used about half a can of carb cleaner. com is for you!. thanks, and no worries, right now nothing is too obvious to me about this bike. Check our Engine emits white/blue smoke while running FAQ for assistance. Search Cub grocery store, delivery & pickup by store location. The choke apparatus includes a choke valve automatically operable in response to the speed of the engine, a thermally conductive assembly that conducts heat from exhaust gases produced by the engine, a thermally responsive member in thermal communication with the thermally conductive assembly, and a mechanism that moves in. "Soon as it warms up and the choke opens it dies, That says to me tour idle speed/ mixture settings are off. Although the main things have been checked, filter, carb, etc but all seem fine and still no luck in getting her to stay going. Starts and stalls within a few seconds: If the choke plate closes properly and the engine starts and stalls almost immediately, the issue is usually not choke-related. It is easy to get parts for and inexpensive. Engine Switch Starter Grip OFF ON ENGINE SWITCH START Directiontopull STARTER GRIP The engine switch controls the ignition system, and it operates the electric starter. Confirm that the choke is really fully opening. Idle speed is excessive. From a number of different sources, Dave has learned that the engine stumbling on acceleration (especially when accelerating through a corner) may be due to one or more of the following (in order of ease of repair) - There may be water in the. I have an '83 KZ1100 Spectre. A lot of times the nuts or bolts that hold the 'jug' on the crank case come loose allowing too much air in the cylinder causing too lean a fuel/air mixture and hence having to run it on choke all the time. When the choke is on, the vent is closed, blocking air from reaching the chamber. its got fresh gas and I run a 35 to40:1 mix on all my 2 stroke motors. It has fuel and oil. The front handlebar controls are, from left to right; hand-grip and rear brake lever switch, parking brake lock lever, reverse button, engine kill switch, light switches, choke, starter button and auxiliary 12 volt receptacle. To adjust idle, back your screws out so they are not touching slides. Engine dies when the choke is open. I changed my oil due to the gasoline in there, now my bike will only startup with the choke, then it dies when given throttle. , is holding the slide wa-aa-ay too high for when the engine's hot. Possibly damaged by a backfire condition. When the choke is closed, it provides the engine with a mixture rich in gasoline for startup. Contributed By: Spencer C. Evinrude that runs for five minutes at times, then just quits, may run more or less than that then quits. IF you put it on choke when it starts sputtering, it smooths out for a few seconds longer, but then dies. However, Ive run into a problem I cant seem to fix. Check for codes first just in case. Convert hundreds of different oilfield units of measurement using the calculator below. It will accelerate under load for about 30 seconds then it will die under load like it's running out of gas. It kind of surges a little during this cold idle thing, and also, you hear a brief , slight whistle noise on the rear of the engine while it is running bad. This could be 1 of 2 problems. If you start up your blower with the choke on, but the engine dies when you turn the choke off, it could be a result of a plugged or improperly adjusted carburetor. It is a device that shuts off the flow of air to the starting circuit as the scooter warms up. The Bike starts fine with the choke. Right as it died, the choke popped all the way open. I have held the choke closed manually for longer thinking maybe the choke is out of adjustment. 2006 nytro I just started the sled for the season and the engine stalls when I shut off the choke. Average repair cost is $420 at 86,250 miles. It happens when engine is both cold and when it's warmed up, and it kills the motor instantly. Engine dies when the choke is open. If you have an n. Search for Stalls While Driving. Engine starts with choke on, but stalls with choke off. when you lift slides with throttle, you should be able to release and both slides give you a clank when they hit bottom of carb. I've never seen a Holley electric choke that was properly adjusted from the factory. An improperly seated or damaged bowl. Got my first experience last fall rebuilding my dad's golf cart engine. Triple A came and got it started with persistence- stepping all the way down on gas and keeping it there. That was one problem down but it still isn't fixed. Breaking in a new 5ive for a friend and a little confused on what's happening. The Bike starts fine with the choke. Because of this, the following can occur: 1. If I push the choke in, the engine dies. However as soon as I go to turn off the choke, it dies. While the engine is warming, make sure it deactivates the choke linkage. Cleaned it all up, reassembled, and no difference. It also explains the workings of the choking system, which will help give you better education on. Honda Power Equipment has many different versions of each model, each for a different application. It was running great until I took it on the highway for about 100 miles, going 65mph. 3) Choke pull off setting incorrect. Fuel flow blocked Check that all fuel lines are clear with no pinhole leaks. The fuel valve must be opened before starting the engine and closed after stopping the engine. As soon as you try to move it to the wide open postition, no matter the engine speed, it will spit and pop and backfire and stall. When the choke is activated, the amount of air entering the carburetor is reduced, increasing the amount of fuel that enters. Complete Outboard Engines. (MTD Snow Thrower) - Getting all my things in order for winter, and the snow thrower dies as soon as it comes off choke. I have a 66 inline6 automatic, it starts just fine and goes into gear fine, speeds up fine, cruises fine, but as the engine warms up or when its at operating temp this is where it seems to act up. Retune your 2. It has a Stromberg WW on it. Minimum Air Adjustment. Then it stopped again. GM Throttle Body Injection 1987-93 LO3 (5. Is the engine receiving lubrication. I'm thinking a clogged high speed jet? Any input is appreciated. When an engine sputters, there are a number of possible causes. If it was a clogged filter it would struggle for fuel when running on choke but you say it seems to run ok on choke once the choke goes in, the engine leans out and cuts out by putting a peg on the choke to hold it on you're just making the mixture more rich. Engine stalls when choke open - posted in Engine: Hows it goin Just a quicky I got the initial timing sorted on my 253 UC so the thing starts. Sometimes it won't just pop with the full choke on, but run with it on. Help please - chainsaw starts fine but dies when given gas. When an engine carburetor is "choked", the fuel to air mixture ratio becomes richer (more fuel & less air) than normal, for easier cold starting and to assist in getting the fuel flowing through the system. Adjust the idle mixture screw to solve the problem. Only runs when choke is on. I feel that its as soon as you try chucking pet through it dies. I posted a while back that my generator wouldn't start.