Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 222Get this manual
OUTLINE OF CHANGES [Z] Item
[3] Cylinder block Piston Piston ring Piston pin Connecting rod Crankshaft Flywheel nut
[3]-1 Cylinder bore: 61 mm 133-2 131-3 PISTONPISTON RING CONNECTING ROD BEARING
[3]-7 Cylinder bore: 58 mm
[3]-8 FLYWHEEL NUT (Ml6)
PISTON PIN
MAIN BEARING [4]-4 Valve guide ID: 5.5 mm (0.22 in) [4]-2 VALVE GUIDES
[4] Cylinder head
[4]-1 Valve guide ID: mm (0.20 in) [4]-2 VALVE GUIDES