Cylinder Head Removal; Cylinder Head Inspection - Yamaha WaveRunner FX140 Service Manual

POWR
CYLINDER HEAD
SERVICE POINTS

Cylinder head removal

1. Remove:
• Cylinder head bolts 1
2. Remove:
• Cylinder head nuts
NOTE:
Loosen the cylinder head nuts in the sequence
shown.

Cylinder head inspection

1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damag-
ing or scratching:
• spark plug bore threads
• valve seats
2. Check:
• Cylinder head
Damage/scratches → Replace.
• Cylinder head water jacket
Mineral deposits/rust → Eliminate.
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