TOHATSU MFS 8B Service Manual page 24

Adjustment of trim tab angle
After installing outboard motor on the boat, use trim tab
to achieve balance between port and starboard steering
loads. Loosen trim tab bolt, adjust angle of trim tab
described below, and then tighten the bolt to specified
torque.
Trim tab bolt :
6 N·m ( 5 lb·ft ) 0.6 kg
Example of trim tab angle adjustment
If it is necessary to steer to port to make boat run
straight or if boat steers itself to port when steering is
held amidships, move trailing edge of trim tab to port
side, or
If it is necessary to steer to starboard to make boat
run straight or if boat steers itself to starboard when
steering is held amidships, move trailing edge of trim
tab to starboard side.
Change trim tab angle a little for each test run
and repeat the process several times until the
best position is found.
1-12
as
Trim Tab
Anti-cavitation Plate
Steering Pivot (Swivel Shaft)
4st 8/9.8 2016