Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 484Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 484

BIGFOOT GEAR HOUSING
Trim Tab Adjustment
1Check trim tab position as follows: Operate boat at the speed at which it normally would be operatedIf the boat pulls to the right (STARBOARD)the trailing edge of trim tab must be moved to the rightIf the boat pulls to the left (PORT)the trailing edge of trim tab must be moved to the left
2If necessary, adjust trim tab as follows: Shift engine control into NEUTRAL and turn ignition key to "OFF" position

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