Service Manual

Spark Plug Service

NOTE: Spark plugs of the wrong size or incorrect heat range can cause severe engine damage.

NOTE: The shrouding, discharge chute and handle may need to be removed to access the spark plug.

High Voltage Ignition Systems can be Dangerous - Use Caution when Servicing Ignition Systems

1. Disconnect the spark plug boot and thoroughly clean the spark plug area.

2. Remove the spark plug from the engine.

3. Inspect the spark plug for excessively worn electrodes, chips or cracks in the insulator, or excessive

deposits.

4. Measure the electrode gap and adjust if necessary. Spark Plug Gap: 0.0275 - 0.0314” (0.7-0.8 mm)

5. Install spark plug and torque to specification - 22 ft-lbs (30 Nm).

6. Fully install the spark plug boot on the plug.

NOTE: Be sure breather tube is routed above the spark plug wire.

Image for reference only

0.0275 - 0.0314”

(0.7-0.8 mm)

Spark Plug