Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 191Get this manual
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HONDA 6F9rkA2SA
c Starter solenoid side
Tighten the mm washer nut to the specified torque so that there is clearance of 1.8-2.8 mm (0.070-0.1 10 in) between the starter solenoid cab