How to correct the Ignition on a Stihl Trimmer



When you pull the starter cord to fire up your Stihl trimmer only to discover that there’s no response from the machine, the ignition coil might require alteration. Another sign that the ignition coil is malfunctioning is just a machine which runs erratically. If the ignition coil isn’t properly spaced, it can be difficult or impossible for the spark to ignite and start the machine. Luckily, adjusting the ignition coil, also called spacing or putting the gap, is a task almost any homeowner may perform.

Remove the outer casing cover from exterior of the trimmer so it’s possible to access the spark plug in and inner workings of the trimmer. Lay the casing and screws aside for replacement at the end of the adjustment.

Disconnect the spark plug wire from the spark by pulling the boot off manually. Ensure that the boot cannot accidentally reconnect with the spark plug until you are finished using the adjustment.

Turn the screws which hold the ignition module set to the left to loosen the module. Do not remove them completely. Simply adjust them to the point where you could wiggle the module a little.

Expand the flywheel manually until the magnet aligns with the ignition module. Insert the spacer card — or a thick business card at the absence of a Stihl spacer card — involving the flywheel magnet and the rear of the ignition module.

Tighten the screws which hold the ignition module in position with the spacer card still in place. When completed, slide the card from between the flywheel and ignition module. The card should slide out easily with mild resistance.

Reattach the spark plug wire to the spark plug. Reposition the outer casing on the machine and reinstall the screws that hold it in position.