Small Engine Will Only Run With Choke On

I got it out of storage for the summer and it won't stay running. Timely question - I have a Featherlite that will run only in full choke. Pressure washer only runs with choke on discussion in the Tool Talk forum at Yesterday's Tractors. Yours must be missing and allowing the top arms to swing too far and hit the choke arm. Solution #5: Evaluate your air cleaner. Use fresh gas. Small Engine Troubleshooting. The solution to this problem is simply clearing the vent hole with a small piece of wire or a short blast of compressed air. If there is not enough fuel mixed with the air. So my craftsman model #536. The carburetors and choke valves in small engines are especially prone to gum, varnish and dirt buildup because of less frequent use. Page 1 of 2 - Cleaning the fuel system on your Honda Generator - posted in The Casita Club Forum: After getting my Honda 2000ui back together after extracting the runaway spark plug I spoke about in another post recently, my Honda would only run with the choke partially on, alerting me that I probably had some carburetor problems, possibly from old fuel residue, since I hadn't used the. It will now only run in the mid-level choke position and runs at about 3/4 of normal high rpm. See the How to Check/Add Oil section. Find the answer to this and other Small Engine questions on JustAnswer. " Lastly, disconnect the power cord from the receptacle, followed by the switchbox. Introduced in 1997, the GCV160 engine offers lighter weight, less mechanical noise, improved fuel efficiency and the world’s first small engine internal timing belt. Video showing the common methods of installing throttle and choke cables on both the auto choke and manual choke engines, how to adjust them and how to change auto choke on newer engines to manual choke so your engine is not revving up to full throttle when started. I let it warm up until it started to labor a bit and then tried to. It also lacks power and after running for a while will stall. I cleaned the fuel filter. Engine would only stay running at half choke. It's in the feel of things. Holding the primer button in for a longer period of time can cause engine flooding. Assuming that's what your referring to as the throttle valve, the only orifice on the engine side of it is a very small one on the side that has a fine threaded needle with external adjustment. 110412 ohv engine with a briggs carb. If it's running stably in that position you're not hurting anything. Plastic choke plates have a stop catch at one end of the spring; metal plates have a notch to hold the hook at one end of the spring. Troubleshoot. Mercedes aimed the C and CE models at owners without demanding families (with children still small enough to fit in the rear), or retired couples who could afford the luxury of a highly equipped vehicle with (usually) a larger engine and for whom the inconvenience of only two doors was not a concern. 5hp briggs question-----carb? Some problems with Briggs and Stratton engines, Comments on Briggs and Stratton Typical engine power is from 3 to 6 HP with the trend nowadays toward. When your engine back-fires it can do so in one of two ways. Re: Honda EM 2200X Genset engine will only run with the choke closed DC, try removing the main jet with a screw driver and cleaning it with a torch tip cleaner. Bzzzooommm! You have heard them before, a two-stroke engine powering a small motorcycle or a scooter. Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. It includes many features like the STIHL Quickstop ® inertia chain brake, Master Control Lever™ and anti-vibration system. Holding the primer button in for a longer period of time can cause engine flooding. Anyone know whats wrong. It starts and runs fine with plenty of power but only if the choke is about halfway out all the time. Tiller is only five years old and is used maybe at most 4 times a year. Fuel: Most 2-stroke engines require that you mix the fuel with a special oil. This, again, is how many bi-metal springs get burned up, because there is no airflow through the choke housing when the engine is not running. I even had one snow-thrower that had such long, narrow ports in it that I couldn't even clean the gum/varnish out of them and ended up buying a new carb to fix the problem after only 1 summer of gas had sit in it. ? Okay, so I purchased a Ryan aerator with a 3. Of course, engines actually run on vapor but the truth is liquid, not gas, is squirted into the engine, a mist, and only a small amount of the liquid vaporizes in the ~thousandth of a second before being ignited. 298580 and the engine model is 190402 and is a type 1650-01. If you have an n. It starts up fine and for the first five seconds, it seems like it's running fine, but then it just cuts out. I got it out of storage for the summer and it won't stay running. The reason it starts and dies is because the engine gets a shot of gas from the choke operation (or primer bulb) - that's enough to get it running, but the blockage in the carburetor starves it of additional gas and then the engine stalls. You'll need to consider cold starting, needle-valve air-intake adjustments. Yesterday, it would only run a few minutes and then stop. Rigo, When an engine will only run with full choke, it is an indication of an induction leak. It is installed in a Pulse 125 XT and swings a 16 x 8 prop. it's possible you there is one or more clogged jets in the carburetor 3. Why will a small engine not run unless it is on choke? the purpose of the choke relay is to supply power to the choke heater ONLY when the engine is running; otherwise if you left the key in. Briggs and Stratton engines are commonly found in all types of lawn equipment -- from mowers to generators. It has an 8 HP Briggs engine that starts and runs good usually. I've changed the plug and installed new air filter. Plugged In reviews movies, videos, music, TV and games from a Christian perspective. Start the lawnmower. For info specific to your carb, we recommend that you purchase the proper repair. The carburetors and choke valves in small engines are especially prone to gum, varnish and dirt buildup because of less frequent use. engine only runs with choke on only runs with choke on stalls when choke returned to normal - Honda 5. Fixing a wet plug (from a flooded engine) is easy. ? Small engines need about 5 to 10 minutes (depending on the air temp) to warm up. An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. Golden Eagle Bike Engines | Geared Kevlar Belt Drive Bicycle Motor Kit Made in the USA! 1yr warranty - Established 2001! Honda Powered Bicycle Engines. Maybe I didn;t clean the carb well enough. • Engine misses or backfires • Dirty or faulty spark plug, Air hose detached or split, Air filter missing. Original 1964 Kohler K181 engine on a 1964 864 Wheel Horse. It works 175MPH. 2) The setting varies depending upon the exact application. New Kohler 25hp runs only on choke. This, again, is how many bi-metal springs get burned up, because there is no airflow through the choke housing when the engine is not running. The carburetors and choke valves in small engines are especially prone to gum, varnish and dirt buildup because of less frequent use. I am a mobile small engine repair man I buy these carburetors and carry them with me it is cheaper and faster for me to replace the carburetor than it is to buy rebuild kits once installed at most only minor adjustments make these a perfect option for me and my customers!. (i did it and have oil in the lines) and it wont stay running he told me that the oil is in the the lp bottle and when the guy. One carb may fit several applications. as the engines run fine afterward, but it happened with a new ZTR just last night and I glanced at the meter and there's only 100. Honda engines today boast of a manual choke that is specially inserted into the throttle control and cable. Run the engine for about 10 minutes to allow most of the old fuel to leave the carburetor. For info specific to your carb, we recommend that you purchase the proper repair. Two possibilities, 1 Air leak-carb, head gasket, crankshaft seal. im having a bit of trouble with my engine on my most recent build. The choke in theory should only be open for a cold start for the first 2-3 mins until the engine warms upwhich doesn't take long on a small mower engine. Propane last forever and doesn't go bad like gasoline does. I've changed the plug and installed new air filter. As soon as I move the choke lever to Partial or fully Open, it gives up a deep throaty sound for half a second as it stalls. When I re-installed the carb now the only way the tractor will idle or run full throttle is with the choke fully closed. so i have a homelite bandit sx-135 on my bike set up as a friction drive. In "Shop Muscle", Anthony and Vic are looking for a part-time job bouncing at the shop. This saw offers professional quality for a. In my experience with small engines it generally means the carb is sucking air from some area other than where it should. Fuel: Most 2-stroke engines require that you mix the fuel with a special oil. It has always need a little choke to run smoothly after it warms up. As soon as I switch it over to run it would stall. 500-inch bore and 2. 4 mm) as opposed to the 5. Holding the spark plug boot close to the engine to check for spark isn't a reliable test because a bad coil can produce a spark in open air but fail when the cylinder is under compression. With the engine warmed up and at idle you may now fine tune the idle mixture screw for optimal performance. in NE’s GREAT #SeaFoamWorks memory: About 20 years ago, my mom bought a used go-kart for me and my younger brother to ride around our grandparents’ farm while we stayed for the summer. It will now only run in the mid-level choke position and runs at about 3/4 of normal high rpm. When I turn the choke off the mower goes off. The name itself comes from the first carbide lamps that used a small hole to drip water on carbide rocks. See if the throttle linkage is adjustable. Hey everybody. I already changed the gas I have good spark at the plug and i cleaned the carb. Started by lcs Missing when at full throttle. I pumped it up, closed the choke and it started on 3 pulls. The engine running lean, either because: 1. " When the engine starts, release the starter button, and gradually move the choke to "off. My generator will run if i spray it with starting fluid, but won't run other wise. Turn off the engine and remove the gas cap. last night i was try using 17. It will n- question about Pressure Washers. and if I screw all in, the engine will dies. Small engine repair guy here said he ran into the same situation himself. The rubber bits tend to deteriorate with time and may leak or may clog up the passages in the banjo bolt. position for the engine to run. i tried to restart it and get it running but it wouldnt. Bought used. stick something long and skinny in the spark plug hole to feel the top of the piston. Page 1 of 2 - Cleaning the fuel system on your Honda Generator - posted in The Casita Club Forum: After getting my Honda 2000ui back together after extracting the runaway spark plug I spoke about in another post recently, my Honda would only run with the choke partially on, alerting me that I probably had some carburetor problems, possibly from old fuel residue, since I hadn't used the. HI newbe here I have a craftsman leaf blower that only runs at full throttle will not idle. engine only runs with choke on only runs with choke on stalls when choke returned to normal - Honda 5. That is, the throttle controls both carburetors as though there were only one. Honda engine will only run with choke all the way out. As soon as I switch it over to run it would stall. Why? By giving the engine more gas when it is about to stall you are essentially compensating for too low and idle by increasing the throttle thus giving the engine enough fuel to stay running. The carbs have been serviced by my dad who has taken many carbs apart before. I've ran it for about 5 to 10 minutes in the full choke position but every. If there is not enough fuel mixed with the air. Start the trimmer and gently unscrew the gas cap halfway off. Any suggestions on where to start troubleshooting. If the fuel pump is failing it might would still run but only with the choke out. I thought it would be an easy fix by cleaning the carburetor. 2) Choke pull-off opening too much. Hold what you are using and slowly turn the crank until the piston is as high in the bore as it will go. Solution #4: If you have a carburetor with an electric choke, check and adjust the choke flap to make sure it is opening completely. I already changed the gas I have good spark at the plug and i cleaned the carb. Move it to half choke or Run and it dies. Tiller is only five years old and is used maybe at most 4 times a year. Another option to protect small engines is to completely drain the engines of all fuel. Normally the engine in Yugo runs on 900 rpm but when you pull the choke it increases to 1400. 2) The setting varies depending upon the exact application. In addition to cleaning the carburetor, many engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug, and deteriorated oil. 5 HP GX160 Engine question Look for a small (about 3" wide X. Holding the primer button in for a longer period of time can cause engine flooding. 5 hp engine. New Kohler 25hp runs only on choke. While this may be caused by improper choke settings or carburetor problems, in many cases, the cause is much simpler: a dirty air cleaner. It has always need a little choke to run smoothly after it warms up. Standard "lead time" for order fulfillment only applies to items currently in stock. Turn off the engine and remove the gas cap. • Engine speed: For best engine performance, it is recommended the engine be operated with the throttle in the FAST (or high) position. With the engine warmed up and at idle you may now fine tune the idle mixture screw for optimal performance. but still fully choked. After the fix and before the ending, Taryl goes over how the auto-choke system works on a Briggs & Stratton engine as well as the carburetor. If your engine only runs with the choke on, check the springs, gasket, air filter, diaphragm, and carb. At that point turn down the choke a bit, until the revs are at around 2,000 rpm or under. horizontal engine. Video showing the common methods of installing throttle and choke cables on both the auto choke and manual choke engines, how to adjust them and how to change auto choke on newer engines to manual choke so your engine is not revving up to full throttle when started. More than that, there is too much choke and the engine will die. Kawasaki paid Honda the ultimate compliment. When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. This setup works so well that my 7 year old son can even start the 6. Small engine help - Echo backpack blower won't start, but runs on starting fluid I picked up a dead Echo PB-413H backpack blower last week. The expression; "choke the engine " refers to placing the carburetor manual choke control into the engaged (starting) position. The manual choke control system allows the small engine equipment operator to temporarily adjust the fuel to air mixture and makes starting an engine that has not been used for a considerable length of time easier. Bzzzooommm! You have heard them before, a two-stroke engine powering a small motorcycle or a scooter. This is a discussion on Won't Run Without Choke ON within the Small Engines forums, part of the Tech Support Forum category. Try using an unlighted propane torch, and pass it over the carb then open the choke, if the propane keeps the engine running that will confirm the need to plug holes down stream of the carb. Same fuel I've been using and same storage method. the engine RPMs will change too much with electrical load and it won. It’s totally okay that we forgot we had a vehicle with a choke. Also try pressing the primer button for only 1 second. 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. This started during this snow season and I want to get it fixed before I store it this year. This will then cause the the engine to lock up and stall. I have taken the muffler off & it was well choked up with coke but after cleaning it's still doing it. I only noticed this after turning the deck off and lower the rpm to drive the tractor back into the barn. Outdoor Gasoline and Electric Powered Equipment and Small Engines - runs only on choke - My pressure washer has a Briggs engine Model Number 150212, Type 0122 E9, Code 070612 with a float bowl carb. Just did two engines that had the same problem. Small Engine & Mower Repair Kawasaki 17hp will only run on choke But. A cold starts requires the choke to be closed but open it up as soon as it starts. Full choke should kill the engine. After several attempts at a fix, thing that did the trick was changing spark plug. The choke lever opens and closes a vent on the mixing chamber of the carburettor. Outdoor Gasoline and Electric Powered Equipment and Small Engines - 49CC 2 Stroke Engine only runs with choke on - Ok -- I posted a while back about this motor in the other section and noticed its the. White smoke from small engines. I've got a lawn tractor with a Briggs 14 hp ohv engine. The Onan engine is known to get a Idle jet plugged up from sediment in the carb. I've seen engines, typically Briggs or Tecumseh, the gasket between the carb and the engine is missing, or badly leaking. 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. I have never seen a gas engine without at least a main jet, if not both idle and main jets. mower runs on 1 cylinder only. Holding the primer button in for a longer period of time can cause engine flooding. Full choke should kill the engine. I acknowledge that they may not be the ONLY techniques available for small engine carburetor troubleshooting and repair, and they may not be the best possible techniques, but they were chosen for this booklet because they have. I might run it for a while on partial choke with a small amount of gas and some injector cleaner mixed in. • Engine will only run with choke on • Crank case oil seals blown, Main jet blocked, Air filter missing, Hose split or missing • Engine will not start when hot. if there any possible the pilot jet was broken or the size is incorrect due imitation product? or maybe i need to setup the float more lean? thank you for the reply Matthew. I think the backfiring problem is a timing problem. · Do not start or run engine in enclosed area, even if doors or windows are open. More than that, there is too much choke and the engine will die. When I start the engine cold, choke is fully open and gradually steps down on the choke cam as designed. booklet have been tried and tested over the years by small engine repair technicians and back-yard-mechanics alike. ENGINE ONLY RUNS ON CHOKE This problem is usually common with Briggs and Stratton Vacu-Jet and Pulsa-Jet diaphragm style carburetors. Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. I've changed the plug and installed new air filter. Also try pressing the primer button for only 1 second. Tecumseh snowblower engine only runs on full choke? A small engine like this doesnt often have a fuel filter, but if it does, replace it. Why would it only run on Choke, even after it warmed up I tried to push in the choke and it would stumble and die, unless I pulled the choke back out. · Do not start or run engine in enclosed area, even if doors or windows are open. I cleaned the fuel filter. 8 mm) rod used in all other small block Chevrolet engines. How to Start a Stubborn Weed Trimmer With a Thimble and Some Gas. 36mm chokes is borderline to use a 45. Check also that you're using the correct gas, regular gas is best for small engines, e10 is ok but e15 or e85 will cause the engine to overheat. Had this problem with it last year so today I figured I'd take a whack at fixing it. Be sure to check out the Business Card page for full-time suppliers of engines, parts and services. Outdoor Gasoline and Electric Powered Equipment and Small Engines - runs only on choke - My pressure washer has a Briggs engine Model Number 150212, Type 0122 E9, Code 070612 with a float bowl carb. Re: Onan 4KY F series generator only runs if I hold the choke open Just remember,soaking a carb in solvent usually will remove sludge buildup but usually wont remove small particles of rust or whatever finds its way into jets etc. My Craftsman front tine tiller ( about 30 years old but runs and looks good) will only run with choke completely on. I've cleaned the carb and checked for air leaks but everything seems sealed. It's been our experience that if the engine will only run in the full or half choke position, it's quite rare for this problem to fix itself. Back your screw up so your not hitting choke arm and instead add spring pressure to the governer spring. Come check out all the different pictures and details about 19 Ways to Diagnose Car Engine Problems, and so much more. 1) Choke not set tight enough. Slowly reduce the speed and as the engine tends to run a little rough, open the idle needle screw just enough to make it run smoothly. For electric lawn mower and other electric yard tool problems, refer to the document: Notes on the Troubleshooting and Repair of Small Household Appliances and Power Tools which includes chapters on basic electrical theory (relax, no rocket science) and electric motor testing and repair information. As long as the engine stays running idle speed is not important at this point. If it's running stably in that position you're not hurting anything. Shutting the Engine Down 1. Had this problem with it last year so today I figured I'd take a whack at fixing it. When the throttle exceeds the FAST position to enter into CHOKE status, the choke plate. If your engine only runs with the choke on, check the springs, gasket, air filter, diaphragm, and carb. Never run a snowthrower indoors or in. Small Engine & Mower Repair Kawasaki 17hp will only run on choke But. These would include the idle mixture, fuel filter and line, throttle, choke, fuel inlet and float (on float-type carburetors) or metering level (on diaphragm-type carburetors). 2) The setting varies depending upon the exact application. According to Autorized. Timely question - I have a Featherlite that will run only in full choke. It can be opened and closed by operating the choke knob manually. " This may only need a minor adjustment for timing or mixture. The carbs have been serviced by my dad who has taken many carbs apart before. horizontal engine. Below are the components found in small engine ignition systems. Our repair and troubleshooting guide will help you understand the cause of your problem and how to best repair it. Honda engine will only run with choke all the way out. If you try to open the choke it begins to rev a bit but then dies. It has an 8 HP Briggs engine that starts and runs good usually. Lawn mower won't start oil on spark plug? The most common reason for oil on a mower spark plug is too much oil in the engine, but there are other possible causes: Mower turned on its side; Head gasket. No engine is made to run on half choke. Question - My Rioby strimmer/hedge cutter engine will only run on choke. If you don't run the engine, the stabilized fuel won't get into the carburetor so it can't do its job. It includes many features like the STIHL Quickstop ® inertia chain brake, Master Control Lever™ and anti-vibration system. The engine will start fairly easilly but will not continue to run without feathering/ pushing the key/choke on the shift controller. 870 inch stroke with an Autolite 2100 2-barrel carburetor. 2) Choke pull-off opening too much. Outdoor Gasoline and Electric Powered Equipment and Small Engines - 49CC 2 Stroke Engine only runs with choke on - Ok -- I posted a while back about this motor in the other section and noticed its the. Remove your hand from the intake and let engine rpm come back up. It's also a good idea to replace your fuel and clean out fuel lines. Small Engine & Mower Repair Kawasaki 17hp will only run on choke But. A choke that does not move freely or close properly can cause difficulties in starting. The modified carburetor should allow your bike to run well enough for a mild test run around the block to speed up the warm-up process. I used to have to take apart & clean one small engine carb or. Reply to this Comment. If you have to close the choke, it's telling you that you are getting too much air (making it run too lean). I bought a predator generator 2500(honda clone) knowing it will only start and run of full choke. Below are the components found in small engine ignition systems. There is an easy way to fix this though, so have a little patience with this answer and your engine, and it will be roaring like a lion when you run it. Engine starts OK, increases RPM then gets too slow with lots of black smoke. The valve is a 'restrictor', not an actual full-cutoff type. Won't Run Without Choke ON. These are the folks that make this page. Once it's running, it only runs for 10 secs, or so,before it dies. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. As soon as the engine starts to run, the air spun from the flywheel fan blows the choke open. Also, if you are running ads, Subscribers and Sponsors get more features and benefits on this site. I pulled the carb, completely dissassembled it, and soaked it one of those paint cans of cleaner but no change. For some reason the mixture with the choke off is too lean and leaving it partly on corrects that. At that point turn down the choke a bit, until the revs are at around 2,000 rpm or under. So you either need more fuel or less air. Will run with only the choke on. In "Shop Muscle", Anthony and Vic are looking for a part-time job bouncing at the shop. tried another carb & still the same. Below are the components found in small engine ignition systems. If you have an n. Our repair and troubleshooting guide will help you understand the cause of your problem and how to best repair it. I went and got new gas and oil mix, no help. Engine only runs with choke on. Since that time Honda has developed its own bigger and better 350, a trio of. Two possibilities, 1 Air leak-carb, head gasket, crankshaft seal. Dirty air cleaners will restrict airflow and cause a rich. if there any possible the pilot jet was broken or the size is incorrect due imitation product? or maybe i need to setup the float more lean? thank you for the reply Matthew. My experiences with "needing to have the choke on to run when warm" have been gummed-up carbs. And it worked fine first start up and ran for about 10 mins just fine. The problem is as soon as I try and take it out of the full choke position the engine dies. I have 150cc go-kart, a 2006 Twister Hammerhead to be exact. This produced a gas that was fed through another small hole and was burned. >"The engine usually runs fine at idle with an occasional misfire (rarely). Something to look at. Suddenly will only run on mid-choke. Any other suggestions would be appreciated. Since that time Honda has developed its own bigger and better 350, a trio of. Hi everyone, can you help me with this issue. Engine: Get the full report Run as many reports as you like for 21 days Unlimited Reports for 21 Days $44. • Engine speed: For best engine performance, it is recommended the engine be operated with the throttle in the FAST (or high) position. More than that, there is too much choke and the engine will die. 09/02/20 10:29:47. I've got a Husqvarna 125-B leaf blower that's been running great for years. With only a few hand tools, and about an hour of time, this same procedure could repair a snow blower, lawn mower, generator, or almost anything with a small engine that has this problem. Hold what you are using and slowly turn the crank until the piston is as high in the bore as it will go. You can use a small amount of Vaseline around the matting edge and then run engine. With a 2cyl briggs engine. Only Sponsors may run ads for commercial products. Clogged low speed and idle circuit. This engine only runs with choke in 1/2 position. I only noticed this after turning the deck off and lower the rpm to drive the tractor back into the barn. Outdoor Gasoline and Electric Powered Equipment and Small Engines - runs only on choke - My pressure washer has a Briggs engine Model Number 150212, Type 0122 E9, Code 070612 with a float bowl carb. I've ran it for about 5 to 10 minutes in the full choke position but every. all of the sudden, i come to a stop and let it idle and it cut out. If you find it not running on one carburetor, check the banjo bolt and/or replace those rubber grommets. 881800 snowblower was only running on choke. its strange. run with the choke on is not a good idea i will burn rich and the engine will run hot fouling the spark plugs your rebel only needs to be serviced by someone who knows what he's doing sometimes friends arn't the best and sadly to say many honda dealer service dept arn't either i had the same problem with my 2007 rebel and luckily found someone to fix it i no longer have the epa. The tip should extend about an 1/8 of an inch (4 mm). I don't think carb is flooding as chock is required to keep it. The expression; "choke the engine" refers to placing the carburetor manual choke control into the engaged (starting) position. The choke does not have a true on and off spot marked on the engine. This video will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running. Throttle is not smooth, but rather touchy/jumpy. Our repair and symptom guide will help you identify the problem and how to fix it. Hey everybody. This vent regulates air from the filter; when it's closed (choke is. If that didn't do it, I'd disassemble the carb, soak it for a couple of days in carb cleaner, and blow passages out with aerosol. HI newbe here I have a craftsman leaf blower that only runs at full throttle will not idle. This is a discussion on Won't Run Without Choke ON within the Small Engines forums, part of the Tech Support Forum category. It is a model 917. But then if you put full choke on again it would idle fine (fast idle on full choke). E15 fuel is the number one reason for a small engine that wont start, wont stay running. Solved: Craftsman leaf blower only runs at full throttle and half choke Discussion in ' Do It Yourself (Not Computer-Related) ' started by lexmarks567 , Aug 12, 2006. Close the choke and pull once on a warm or hot engine to create the vacuum needed to draw in fuel, open choke and pull again to start it. Check also that you're using the correct gas, regular gas is best for small engines, e10 is ok but e15 or e85 will cause the engine to overheat. Yesterday, it would only run a few minutes and then stop. The auto-choke is ON in it's natural state. A choke valve is sometimes installed in the carburetor of internal combustion engines. If you don't run the engine, the stabilized fuel won't get into the carburetor so it can't do its job. This video will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running. Fuel being drawn into engine from another source. Start the trimmer and gently unscrew the gas cap halfway off. Re: Outboard motor needs choke all the time :-( The carb has to mix the right amount of petrol with the right amount of air in order to work efficiently.