Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 368Get this manual
15) Connect the shift control cable to the shift arm and secure with the mrn washers and mrn lock pinCAUTION: Set the washers on both sides of each arm as shownSHIFT CONTROL CABLE mm WASHER (2)
THROTTLE CONTROL CABLE ADJUSTMENT
1) Set the control lever in the "F" (Forward) position, throttle arm in the full open position and the fast idle lever the "Idle position" respectivelyCheck whether there is clearance of mm (0.04 in) or below between the carburetor throttle lever and the carburetor full open stopper