Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 76Get this manual

Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 76

INSP ADJ
POWER UNIT6Adjust:
9Intake valve clearance 9Exhaust valve clearance

Adjustment steps: Loosen the lock nut and insert the 0.10 mm (0.004 in) feeler gauge between rocker arm and valve stem8 Turn adjuster to obtain the proper clearanceTurning in Valve clearance decreasesTurning out Valve clearance increases7Tighten:
9locknut 6

Locknut (rocker arm): 10 Nm (1.0 mkg, 7.2 ftlb) NOTE: Tighten the locknut, keeping the adjuster fixed8Install:

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