Yamaha 25BMH 30HMH Factory Service Manual, Page 144Get this manual

Yamaha 25BMH 30HMH Factory Service Manual, Page 144

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COOLING SYSTEMLOWER UNIT COOLING SYSTEM
LOWER UNIT
CHECKING THE GEAR OIL LEVEL
Check: Gear oil level Level is low Add gear oil to the proper level
CHANGING AND CHECKING THE GEA