Echo Chain Saw CS4910 2020 Carburetor Replacement

Make sure you have the ignition switch turned off before starting your repair.

Use your fingers to loosen the air filter cover knob.

Remove the air filter cover.

Remove the air filter

Use your fingers to pull up and disconnect the spark plug boot.

Use a 13 mm wrench to loosen and remove the two nuts securing the sprocket guard.

Pull the sprocket guard straight off its two pegs and remove it.

Pull the saw chain away from the tip of the guide bar to unclip it.

Push the guide bar towards the back of the device to unclip the rest of the saw chain.

Pull the guide bar away from the device to separate the saw chain from the clutch drum.

Remove the guide bar and the saw chain.

Use a flathead screwdriver, or a 3 mm hex key, to remove the three 18 mm screws securing the engine cover.

Pull the engine cover straight up off the engine.

Remove the engine cover.

Use your fingers to pull the top-most fuel pipe out of the carburetor.

Lift the choke rod out of its recess in the chassis.

Twist the rod counter-clockwise to disconnect it from the carburetor.

Remove the choke rod.

Remove the four screws securing the carburetor and the air filter adapter:

Use a 3 mm hex key to remove the two 20 mm-long screws.

Use a 4 mm hex key to remove the two 53 mm-long screws.

Pull the air filter adapter straight off the carburetor and remove it.

With the carburetor's choke valve facing you, tilt the carburetor up and to the left to expose the right-most fuel pipe.

Use your fingers to disconnect the right-most fuel pipe.

Lift the carburetor straight off the throttle rod and remove it.