Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 48Get this manual
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5VALVE CLEARANCE COVER
111 "Tf" MARK (No1 PISTON AT TOP DEAD CENTER OF COMPRESSION STROKE)
[3] FLYWHEEL
ALIGNING MARKS 151 FLYWHEEL COVER OR RECOIL STARTER MOUNT