Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 66Get this manual
BFSOBF5A SHIM SELECTION
Gear shim and pinion washer codes are marked inside the gear caseIf new gear case installed, refer these codes, and select the correct parts
[2] PINION SHAFT
GEAR SHIM (PROPELLER SHAFT HOLDE
[4] PINION WASHER
[51 PINION BEVEL GEAR
EAR CASE SIDE)
71 PROPELLER SHAFT
REVERSE BEVEL GEAR
1 FORWARDBEVEL GEAR 9
GEAR SHIM (GEAR CASE SIDE) SHIM CODE
[ GEAR SHIM MARK Il