Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 175Get this manual
THROTTLE CABLE ASSEMBLY: 1) Turn the throttle grip the full open position, then back it off (0.1 in) from the fully open position and tighten the friction bolt
3 rnm (0.1 in)
2)Adjust the closed side and open side of the throttle cables the length shown in the drawingNOTE Before adjusting the throttle cable length, be sure that throttle cables are connected the outboard motor securely (page 15-41
67 mm (2.6 in)
CLOSED SIDE
3) Connect the throttle cables the throttle arm4) Connect the throttle cables the throttle cable bracket