How to Identify and Fix Common Gardening Problems ?
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Why would the engine only run while the choke is on or with repeated manual priming? An engine that requires the choking (partial or full) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment.
Its common for small engines to need carburetor adjustments over time. Your engine is running lean and putting the choke on partially is helping it draw more fuel to run good. Adjust the carb if its adjustable or buy a new carb. You can find info on carb tuning in small engine service books.
The most common reason for a surging lawn mower engine is a blockage in the fuel supply, but there are other possibilities: Bad gas. Bad spark plug. Dirty/faulty carburetor.
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.
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. Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting.
With the choke on, the fuel blasts its way in and provides the carburetor with the fuel it needs. While this is relatively safe and doesn`t harm any of the internal parts of the bike, it does lead to higher consumption of fuel.
A choke valve/cable is designed to restrict the flow of air in the carburettor of an engine. This helps enrich the fuel-air mixture, improving the ability to start an engine in low temperature conditions.
The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc.
If your bike is only running with the choke on, it`s probably because it`s running too lean. This can be caused by a few different things: All internal combustion engines need three things to run: fuel, air, and spark. If any of these are missing or not working properly, the engine won`t run.
A Dirty Carburetor
Can Cause a Lawnmower To Start Then Die
By far, the most common issue that causes a stalled motor is a dirty carburetor. The carburetor on your engine is the thing that draws in air and mixes it with the fuel. Contrary to what the movies might make you think, gasoline itself is not very flammable.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Will only start and run in choked position, when throttle applied chokes out. If started with out choke and throttle position in low speed will start and run for 10 sec then like it runs out of gas.
I have your solution guaranteed, I fixed mine yesturday remove H L screw plastic caps and on high 11 threads exposed and on the low side 8 threads exposed. removing the plastic caps allows u further adjusting these wear out or move soo just take them things off and you will be rolling
Seems to start easily run for a few minutes and then slow and stop–bulb remains full –gas is good–have tried half choke in case too lean–did not solve–also seems possibly related to the angle I hold it at–seems to cut out quicker if blower tube angled more downward.
Your filter may be hanging up in the tank. you also my be losing compression
My mantis will not stay running unless the choke is full on
Sounds like the fuel pump diaphram in the carb. you need to either be familar with it or take it to thae shop to replace
Blower only runs with full choke. When I switch to half choke, it dies and won’t start.
It may simply need the high speed jet opening up a bit (2 screws near eachother on the carb and the high speed is furthest from the engine)failing that it needs a carb kit…. this is a serviceable item changed regularly.
Have to run on half choke,just stops if i turn it off.fuel is 25 to 1. thanks alan.
More than likely a small passage way in the carb is clogged. You can try some carb cleaner, but you may need to disassemble the carb and clean it out. Be advised that these passageways are sometimes as fine as a human hair, and almost impossible to clear sometimes. A new carb may be required if it is worth it to you. Sorry.
I have a home lite chainsaw and it will run for a few secongds with full choke but it acts like its not getting fuel after you turn the choke of
Here is a link to a couple of my Tips. They should solve your problem if you follow the steps.www.fixya.com/support/r6081405-cleaning_small_engie_carburetorGood Luck!Jim
Starts right up on choke. then run inrun position for a minute and have to go back to choke to keep it running ,then it runs fine for a couple of minutes and have to go back to choke and start all over again.
This happens with the cover off, so not the filter.
While running what setting does the choke lever need to be placed in
Depending on how your unit runs, it may need to be on half choke until the motor warms up. After the motor gets hot it should run with the choke fully off.