What is auto choke on a lawn mower?

How does automatic choke on lawnmower work?

It’s either running full tilt or it’s off. The choke system uses a light spring to “set” the choke. Once the engine begins to run some type of vacuum signal or possibly the air flow generated by the cooling fan pushing against a vane and linkage or the engine governor through linkage will release/hold open the choke.

What does auto choke do?

A choke valve is sometimes installed in the carburetor of internal combustion engines. Its purpose is to restrict the flow of air, thereby enriching the fuel-air mixture while starting the engine.

When should I use choke on my lawn mower?

A lawn mower choke reduces the airflow of the engine, allowing for more fuel to be used. This process allows the engine to spark and ignite easier, starting up in an instant. Choke valves should only be used when absolutely necessary, as they can damage the engine if they’re overused.

Does choke open or closed carburetor?

Choke is generally used in a naturally aspirated engine with carburetor. Choke is a butterfly valve that mounted on the inlet of air passage of carburetor (upstream from carburetor venturi tube). Normally choke will be in open position, in which valve is parallel to the air flow, and has no effect on the air flow.

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Should the choke be up or down?

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. Once the car has warmed up, if the choke does not open fully, the restriction in air may result in reduced power.

What happens if you leave choke on lawn mower?

If the engine is successfully started, leaving it at full choke for only a few seconds can cause too much fuel to enter into the combustion chamber. This will then cause the the engine to lock up and stall. … A stuck choke can also prevent you from closing it fully to allow the engine to start properly.