Trim Tab adjustment- 20, 25, 30
1994 Johnson/Evinrude 9.9-30HP models
Improper trim tab adjustment can cause difficult steering.
A propeller will generate steering torque when the propeller shaft is not running parallel to the water's surface. The trim tab is adjustable to compensate for this steering torque.
Important A single trim tab adjustment will relieve steering effort under only one set of speed, motor angle, and load conditions. No single adjustment can relieve steering effort under all speed, motor angle, and load conditions.
If the boat pulls to the left or right when its load is evenly distributed, adjust the trim tab as follows:
- With the motor shut OFF, loosen the trim tab screw. If the boat pulled to the right, move the rear of the trim tab slightly to the right. If the boat pulled to the left, move the rear of the trim tab slightly to the left.
- Tighten the trim tab screw to a torque of 60-84 in. Ibs. (7-9 Nm).
- Test the boat and, if needed, repeat the procedure until steering effort is as equal as possible.
High motor installations - The trim tab might be above the water when the motor is trimmed out. Steering effort might increase. Steering effort will be reduced if you trim the motor in and submerge the trim tab.
Dual motors - Move both trim tabs equally and in the same direction.
Updated on: Wednesday, November 11, 2020