1999 EE Johnson Outboards 25, 35 3-Cylinder Service Manual, Page 201Get this manual
With the motor shut OFF, loosen the trim tab screwIf the boat pulled to the right, move the rear of the trim tab slightly to the rightIf the boat pulled to the left, move the rear of the trim tab slightly to the left
Tighten the trim tab screw to 60-84 inIbs(7-9 Nm) Test the boat and, if needed, repeat the procedure until steering effort is as equal as possibleHigh motor installationsThe trim tab might be above the water when the motor is trimmed outSteering effort might increaseSteering effort will be reduced if you trim the motor in and submerge the trim tabDual motorsMove both trim tabs equally and in the same direction