Why does a carburetor only work with the choke on?
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.
Why does my bike only run on choke?
So, why does a motorcycle only run with the choke on? It means your motorcycle is not getting enough fuel, and this can be caused by dirty or clogged pilot jets, clogged fuel line, clogged fuel filter, dirty petcock, loss of vacuum in the carburetors, among other carburetor issues.
Why does my trimmer only run on full choke?
When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. Start the trimmer and gently unscrew the gas cap halfway off. Turn the choke off and assess. If the engine is still running, that means the gas cap may be the culprit.
Why does my trimmer dies when I give it gas?
If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. Remove the air cleaner cap and filter, checking for any obstructions in the way that could block air flow, starving the engine of oxygen.
Why does my trimmer keeps stalling?
A clogged fuel filter is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the fuel filter and cause the engine to stall.
Is choke open or closed when starting?
The choke is a plate in the carburetor that opens and closes to allow more or less air into the engine. The choke is only used when starting a cold engine. When doing a cold start, the choke should be closed to limit the amount of air going in.
How do you tell if choke is on or off?
Choke on means that the choke plate is covering the carb throat. The “choke” is off when the choke lever is down or when the choke lever is facing you if your choke is a handle bar mount. Choke off means that the choke plate is not covering the carb throat.
What does a 2 stroke choke do?
A choke restricts the flow of air at the entrance of the carburetor. This creates a stronger vacuum which draws in less air but more gasoline to create a “rich” fuel which is easier to ignite when the engine is cold. When the engine warms up, less fuel is needed.