Engine; Spark Plugs - Yamaha VK540EF Service Manual

SPARK PLUGS

ESS00032

ENGINE

ESS00033
SPARK PLUGS
1. Remove:
S Spark plug caps
S Spark plugs
2. Inspect:
S Electrodes 1
Damage/wear ! Replace the spark plug.
S Insulator color 2
3. Measure:
S Spark plug gap a
Out of specification ! Regap.
Use a wire thickness gauge.
Spark plug gap a :
0.7 X 0.8 mm (0.028 X 0.032 in)
If necessary, clean the spark plugs with a spark
plug cleaner.
Standard spark plug:
BR9ES (NGK)
Before installing a spark plug, clean the gasket
surface and spark plug surface.
4. Install:
S Spark plugs
Spark plug:
20 Nm (2.0 mSkg, 14 ftSlb)
NOTE:
Finger-tighten a the spark plug before torquing
b it to specification.
2-3
INSP
ADJ