How to Clean a Push Mower Carburetor

Turn off the fuel valve (if equipped) or clamp the fuel line. Disconnect the spark plug wire.

Remove the air filter housing to access the carburetor. Take a photo of all connections before disconnecting anything.

Disconnect the fuel line from the carburetor. Have a rag ready — fuel will drip.

Disconnect the throttle linkage and any springs attached to the carburetor. Take photos as you go.

Remove the bolts holding the carburetor to the engine and carefully pull it free.

Remove the carburetor bowl (bottom cup) — usually held by one bolt. Catch any fuel that spills. Inspect the bowl for sediment or corrosion.

Remove the float and needle valve. The float is a small plastic or brass piece that controls fuel level. The needle valve sits in the float's hinge — don't lose it.

Locate the main jet — a small brass fitting with a tiny hole. Remove it carefully. Look through it — if you can't see daylight through the hole, it's clogged.

Spray all passages, jets, and openings with carburetor cleaner. Use the straw attachment to direct cleaner into every hole. Follow with compressed air to blow passages clear.

Use a small wire or needle to gently clear any stubborn clogs in the jets. Don't enlarge the holes.

Reassemble in reverse order with new gaskets if available. Make sure the float moves freely and the needle valve seats properly.

Reattach the carburetor, reconnect fuel line and linkages, and reinstall the air filter. Open the fuel valve and check for leaks before starting.