STIHL Gasoline Cut-Off Machine TS420

Is the engine running satisfactorily after standard setting?

Turn the high speed adjusting screw (H) slightly clockwise (leaner)

Is the machine operated at a high altitude?

Restore the carburetor setting to the standard setting if no longer at high altitude

Turn the tensioning nut (2) counterclockwise with the combination wrench – approx. 1/4 turn, as far as it will go = 0

Pull the water hose out of the guide in the V‑belt guard

Raise the V‑belt guard (4) slightly and pull it off to the front

Remove the V‑belt from the front pulley

Unscrew the banjo bolt with the combination wrench

Remove the square nut from the inside of the guard from the guide

Remove the water hose with connector from the adjusting lever

Pull the water hose out of the guide in the V‑belt guard

Is the water attachment completely removed?

Describe any issues encountered during removal

Unscrew the screw and remove cap

Use the combination wrench to unscrew the spark plug

Check that all parts are in place after removal

Inspect the removed spark plug for wear or damage

Clean the area around the spark plug hole

Pull the fuel pickup body out of the tank with a hook

Disconnect the fuel pickup body from the hose

Install the new fuel pickup body

Connect a new fuel pickup body to the hose

Return the fuel pickup body to the tank

Check for leaks after installation

Describe any issues encountered during the procedure