Ex-Power DEFENDER – Operation and Maintenance Manual
Novatio Engineering Confidential Document
5-7
Figure 5-8: Removing Spark Plug from Engine
5.
Inspect the spark plug.
6.
Clean with wire brush if spark plug is in good condition.
7.
Replace spark plug if the electrodes are worn or if the insulator is cracked, chipped, or
fouled.
Recommended Spark Plug Replacement Types:
CR5HSB (NGK)
U16FSR-UB (DENSO)
An incorrect spark plug can cause engine damage. To ensure proper engine
operation, the spark plug must be properly gapped and free of deposits.
8.
Measure the spark plug electrode gap with an approved feeler gauge. Correct the gap, if
necessary, by carefully bending the side electrode.
GAP: 0.024-0.028 in (0.6 – 0.7 mm)
Figure 5-9: Spark Plug Gap Setting
CAUTION
