Spark Plug: Service and Repair

1. Take great care when fitting spark plugs not to cross-thread the plug, otherwise costly damage to the cylinder head will result.
2. Check or replace spark plugs as applicable.
3. It is important that only the correct type of spark plugs are used for replacements.
4. Incorrect grades of plugs may lead to piston overheating and engine failure.

Spark Plug:

5. Disconnect the battery negative lead and remove the leads from the spark plugs.
6. Remove the plugs and washers.
7. Set the electrode gap to the recommended clearance.
8. Install new spark plugs.
9. When pushing the leads onto the plugs, ensure that the shrouds are firmly seated on the plugs.




10. Ensure that replacement H.T. leads are refitted in their spacing cleats in accordance with the correct layout illustrated. Failure to observe this instruction may result in cross-firing between two closely fitted leads which are consecutive in the firing order.