How to rebuild a chainsaw carburetor

Wear work gloves to protect your hands.

In a well-ventilated area, remove the fuel cap and drain the tank into an approved storage container.

Using an Allen wrench, remove the screws that hold the cylinder shield to the engine. Lift off the cylinder shield.

Disconnect the wire from the spark plug. Pull the cover off the air filter housing and remove the filter.

Using a 7/16-inch socket driver, remove the 2 mounting nuts that secure the carburetor to the engine.

Pull the air filter housing off the carburetor.

Pull the carburetor away from the engine block. Be careful not to bend the throttle linkage or damage the gas lines. Use needle-nose pliers to detach the gas lines from the carburetor.

Disconnect the throttle linkage. Pull the carburetor completely off the mounting studs.

Place the carburetor on a clean work surface and remove the screws from the bottom cover. Detach the cover.

Peel the metering diaphragm and gasket from the bottom of the carburetor. Line up the parts in order as you pull them off.

With the metering diaphragm removed, locate the lever on the hinge. Remove the mounting screw and detach the lever.

Remove the pump cover screw on the top of the carburetor.

Pull out the pump diaphragm.

Remove the screw securing the needle and fuel lever.

Remove the screw securing the needle and fuel lever.

Clean all ports and jets in the carburetor with carburetor cleaner and compressed air. Allow the carburetor to dry for at least 10 minutes.

Install the needle and lever to the bottom of the carburetor.

Install the metering diaphragm, gasket and bottom cover.

Install the pump diaphragm and the top cover.

Replace the carburetor-mounting gasket.

Connect the throttle linkage.

Slip the carburetor onto the mounting studs and push it into place.

Connect the fuel lines.

Reinstall the air filter housing.

Replace the mounting nuts and tighten them to seal the gasket between the engine and the carburetor.

Position the air filter in the housing and replace the cover. Reattach the spark plug wire.

Reinstall the cylinder shield on the chainsaw. Refill the fuel tank.