Trim Tab Adjustment - Mercury 40 Service Manual

BIGFOOT GEAR HOUSING

Trim Tab Adjustment

1. Check trim tab position as follows:
2. If necessary, adjust trim tab as follows:
NOTE: Loosen trim tab bolt sufficiently to allow trim tab to disengage from locking ridges
in gear case before attempting to move tab. DO NOT strike trim tab with a hard object to
make adjustments.
3. Tighten trim tab retaining bolt and washer to 22 lb-ft (29.8 Nm).
Page 6B-62
Operate boat at the speed at which it normally would be operated.
If the boat pulls to the right (STARBOARD), the trailing edge of trim tab must be
moved to the right. If the boat pulls to the left (PORT), the trailing edge of trim tab
must be moved to the left.
Shift engine control into NEUTRAL and turn ignition key to "OFF" position.
If boat pulls to the left, adjust trailing edge of trim tab to the left. If boat pulls to the
right, adjust trailing edge of trim tab to the right.
90-828631R3 MARCH 1999