Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 150Get this manual
HONDA BFSOAa5A
2) Set the special tool on the vertical shaft as shown and attach the tip of the dial gauge the special tool
il BACKLASH INSPECTION ATTACHMENT
TOOL: Backlash inspection attachment
3) Turn the vertical shaft right and left while pressing it down with approximately11.0 Ib) of force and measure the backlash
Standard
m (0.004-0.01 in)