What does the choke on a motor do?

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. … Simply put, the choke is about making more fuel available for the engine to use.

Is it bad to run an engine with the choke on?

Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. This is also bad for the environment. One a cold day, the engine can need more fuel than usual to get running – this makes the mixture ‘rich’, and this is what the choke does.

Is the choke supposed to be open or closed?

The choke is a plate in the carburetor that opens and closes to allow more or less air into the engine. … When doing a cold start, the choke should be closed to limit the amount of air going in. This increases the amount of fuel in the cylinder and helps to keep the engine running, while it is trying to warm up.

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What happens if you keep the choke on?

Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. … The engine needs its fuel to be vaporised in order to burn it. This is done by the carburettor where the fuel is mixed with clean air coming from the air filter, and sent into the pistons to be ignited.

How long should you leave the choke on?

Usually 1-2 minutes. Your choke richens the mixture so the risk is fouling plug if you run too long.

How can you tell if the choke is on?

Simply remove the air filter fitted to the carburetor and look into the throat of the carb. Move the “choke” lever back and forth. When the “choke” is closed you will see a metal plate restrict the opening of the carb throat. This is the CHOKE ON!

What can go wrong with a carburetor?

Carburetor Problems and Solutions

PROBLEM POSSIBLE SOLUTION
Carburetor floods Engine starves for fuel at high speed (leans out) Check inlet needle and seat for condition and proper installation
Carburtor leaks Engine overspeeds Idle speed is excessive Check sealing of welch plugs, caps, plugs and gaskets

Why do I have to choke a warm engine?

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. … Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting.

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How do you fix a sticking choke?

Replacing the choke cable can be a really difficult job depending on the cable routing. A better solution is to just lubricate your sticking cable so the choke can operate easily and smoothly so you can set it in just the right position. PJ1 Cable Lube is easy to use and can quickly get your choke working smoothly.

Why does my Weedeater only run on 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.

Can you run a pressure washer on choke?

Starting a Gas-Powered Pressure Washer

Move the choke to the left (the open position). Move the throttle to the left (the full throttle position). Turn the engine switch to the “ON” position. … Then, close the choke.

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