Looking To Replace A Chainsaw Carburetor?
This step-by-step repair guide shows how to replace a chainsaw carburetor. The carburetor mixes air and gas before the fuel mix goes to the engine. If the engine won’t start and the tank is full of fresh fuel, test the carburetor by removing the air filter and pouring about a teaspoon of fuel into the carburetor. Pull the starter rope. If the engine starts and then quickly dies, the carburetor is likely the problem.
Time required: Less than 30 min
Tools Required: Allen wrench
7/16″ socket driver
Needle-nose pliers
Approved fuel container
Rags
Work gloves
Safety glasses
Drain the fuel tank
In a well-ventilated area, remove the fuel cap and the drain the tank into an approved storage container.
Remove the cylinder shield
Using an Allen wrench, remove the screws that hold the cylinder shield to the engine. Lift off the cylinder shield.
Disconnect the spark plug wire and remove the air filter
Disconnect the wire from the spark plug. Pull the cover off the air filter housing and remove the filter.
Remove the carburetor mounting nuts
Using a 7/16″ socket, remove the two mounting nuts that secure the carburetor to the engine.
Detach the air filter housing
Pull the air filter housing off the carburetor.
Disconnect the fuel lines
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.
Tip: For accurate reassembly, take digital photos of the throttle linkage on the carburetor and the gas line connections.
Remove the carburetor
Disconnect the throttle linkage. Pull the carburetor completely off the mounting studs. Check the mounting gasket and replace it if necessary.
Install the new carburetor
Connect the throttle linkage on the new carburetor. Slide the new carburetor onto the mounting studs. Connect the fuel lines.
Fasten the carburetor in place
Slip the carburetor onto the mounting studs and push it into place. Position the air filter housing on the protruding studs.
Replace the mounting nuts and tighten them to seal the gasket between the engine and the carburetor
Reinstall the air filter cover and connect the spark plug
Position the air filter on the housing and replace the cover. Reattach the spark plug wire.
Reinstall the cylinder shield
Reinstall the cylinder shield on the chainsaw. Refill the fuel tank.