Engine; Spark Plugs; Fuel Line Inspection - Yamaha RS90K Service Manual

SPARK PLUGS/FUEL LINE INSPECTION
2

ENGINE

SPARK PLUGS

1. Remove:
2. Inspect:
3. Measure:
If necessary, clean the spark plugs with a spark
plug cleaner.
Standard spark plug:
NGK R CR8E (NGK)
Before installing a spark plug, clean the gasket sur-
face and spark plug surface.
4. Install:
NOTE:
Finger-tighten a the spark plug before torquing b
it to specification.

FUEL LINE INSPECTION

1. Inspect:
1
2-3
• Spark plug caps
• Spark plugs
• Electrodes 1
Damage/wear → Replace the spark plug.
• Insulator color 2
• Spark plug gap a
Out of specification → Regap.
Use a wire thickness gauge.
Spark plug gap:
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
• Spark plugs
Spark plug:
13 Nm (1.3 m · kg, 9.4 ft · lb)
• Fuel hoses 1
• Fuel delivery hoses 2
Cracks/damage → Replace.
INSP
ADJ