John Deere Ztrak F620 Mower Problems

Check your John Deere Ztrak F620 lawn mower's gas tank if it refuses to start. Ensure it has adequate fuel.

Open the hood over the engine, which is located at the rear of the John Deere Ztrak F620 lawn mower. Check the spark plug and ensure the thin, black plug wire is connected to the spark plug. If it is not, reconnect it.

Replace the spark plug if the plug wire is already securely connected to it. It is likely in this scenario that the spark plug is simply old. Disconnect the plug wire from the old plug and connect it to a new, replacement spark plug.

Locate the distinctive, circular magnetic coil at the rear of the John Deere Ztrak F620 lawn mower's engine assembly. Directly behind the mower's magnetic coil is the flywheel. The tiny gap between these two parts is the air gap. Measure it and ensure it falls between 0.010 and 0.015 of an inch in width.

Loosen the John Deere Ztrak F620 lawn mower's magnetic coil with a wrench and slightly reposition it in relation to the flywheel in order to ensure the air gap is between 0.010 and 0.015 of an inch in width.

Close the John Deere Ztrak F620 lawn mower's hood and crank the engine. It should now start.