Honda BF35A-BF45A Outboard Motors Shop Manual., Page 471Get this manual
7TRIM ANGLE ADJUSTMENT NOTE: Install the outboard motor so that the axis of the propeller is parallel with the water surface,
1) Push in the adjusting rod, then twist upward and pull it out to remove
CRUISING CHARACTERISTICS
Correct
2) Adjust the outboard motor position so that the antiventilation plate is parallel to the bottom of the boatReposition the adjusting rod and secure it by folding the rod stopper downNoof adjustment positions: positions: (8', 12" 16'24') ADJUSTING ROD
: Too small :
Most stable cruising and maxperformance