Honda BF50 (5HP), BF5A Outboard Motors Shop Manual 2014, Page 72Get this manual
BFI5CBFI5A SHIM SELECTION
BF5A: BADS-1701364 and subsequent Gear shim and pinion washer codes are marked outside the gear case as shownIf new gear case is installed, refer to these codes and select the correct parts
PINION SHAFT
PINION WASHER PINION BEVEL GEAR
REVERSE BEVEL GEAR FORWARD BEVEL GEAR
GEAR SHIM (GEAR CASE SIDE) GEAR SHIM (GEAR CASE SIDE) PINION WASHER CODE SHIM QTYSHIM 0.10 mm (0.004 in) 0.15 mm (0.006 in) 1