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Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to specification if necessary.

Spark plug gap:

Refer to “SPECIFICATIONS”, page 4-1.

When fitting the plug, always clean the gasket surface and use a new gasket. Wipe off any dirt from the threads and screw in the spark plug to the correct torque.

Spark plug torque:

Refer to “SPECIFICATIONS”, page 4-1.

NOTE:

If a torque-wrench is not available when you are fitting a spark plug, a good estimate of the correct torque is 1/4 to 1/2 a turn past finger-tight. Have the spark plug adjusted to the correct torque as soon as possible with a torque-wrench.

Initial of spark

Plug wrench size

plug I.D. mark

 

 

 

B

21 mm (13/16 in.)

 

 

C/BK

16 mm (5/8 in.)

 

 

D

18.3 mm (23/32 in.)

1Spark plug gap

2Spark plug I.D. mark (NGK)

4-13