John Deere PS04120 — John Deere PS04120 Chain Saw Operator Manual & Service Guide PDF (EN)

OPERATION Starting the Engine E WARNING Keep body to the left of the chain line. Never straddle the saw or chain, or lean over past the chain line. C D F H Run Place the chain saw on level ground and ensure that no objects or obstructions are in immediate vicinity which could come in contact with the bar and chain. Hold the front handle firmly with the left hand and put your right foot onto the base of the rear handle, see illustration ( A ). Set the chain brake by pushing the chain brake lever / hand guard forward (towards the bar), to the Brake Position as shown in Illustration ( B ). Refer to Safety-Chain Brake and Operation-Chain Brake Sections for additional information.

Move the ignition switch ( C ) to the start position “ I Pull the choke lever ( D ) to the fully extended position ( G Full Choke / Full Choke), as shown in Illustration ( E ). Depress the throttle trigger lockout ( F ) and squeeze the throttle trigger ( G ), depress the half-throttle lock button ( H ) with your thumb and release the throttle trigger ( G ). This sets the throttle trigger to the half- throttle position. Depress the compression relief valve ( J ). Pull the starter rope until the first firing of the engine is heard (no more than five (5) pulls), a new unit may require additional pulls. NOTE: Compression relief valve automatically resets after the first firing.

Push the choke lever ( D ) completely in to the engine run position, as shown in Illustration ( E ). Depress the compression relief valve ( J ) and pull the starter rope until the engine starts. Immediately after the engine has started, depress the throttle trigger lockout ( F ), quickly squeeze and release the throttle trigger ( H ). This releases the throttle trigger from the half- throttle position and lets the engine idle. Place chain brake lever / hand guard into the run position as shown in Illustration ( B ). Refer to Safety-Chain Brake and Operation-Chain Brake Sections for additional information. NOTE - STARTING WARM ENGINE:

Follow above starting instructions, but do not use the full choke position for start up. J Breaking-in the Engine Engine break-in period is approximately 20 hours or 30 tanks of fuel. During this period avoid using the chain saw at prolonged high- speed operation. Stopping the Engine Release the throttle trigger ( G ) and let the engine return to idle. To stop the engine, move the ignition switch ( C ) to the “ ” stop position. Do not put the chain saw on the ground when the chain is still moving. For additional safety, set the chain brake when the saw is not in use. In the event that the A / Full Choke ) to stop the engine.

” stop switch will not function, pull the choke lever out to the fully extended position ( Carburetor Adjustment Before adjusting the carburetor, clean the starter cover vents as shown in Illustration ( K ), and air filter as shown in Illustration ( L ), refer to Operation-Starting Unit and Maintenance-Air Filter Sec- tions for details. Allow the engine to warm up prior to carburetor adjustment. Run Position B Brake Position 13 English K L K L