Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 271Get this manual
5) Move the throttle cam slowly in the direction pointed by arrow until the throttle cam roller is set free from the throttle cam, and hold the throttle cam 6) Move the diaphragm up and down slowly until the clearance between the throttle cam roller and throttle opener cam is 0.20.8 mm (0.0080.031 in)While holding the clearance, tighten the 16 mm tom bit bolts to the specified torque using commercially available tom bit (T30H)
TORQUE: Nm(0.9 kgf-m, 6.5 lbf4t)
7) After adjustment, attach the throttle rod to the throttle cam
4THROTTLE RODTHROTTLE CABLE
Throttle Rod Length Adjustment
I)Remove the mm lock pin and mm washers, and disconnect the throMe cable from the throlde arm