Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 294Get this manual
6 FLWHEEMIMING BELT IFLYWHEEL
aASSEMBLY
Clean the flywheel and crankshaft mating surfaces and the tapered part of the crankshaft with clean shop towel and degreasing agentInstall the flywheel aligning the flywheel key way with the woodruff keySecure the flywheel with the holder(P6-2 of the base shop manual)Apply thin coat of engine oil to the flanged part and threads of the 18 mm special nut, then tighten it to the specified torqueTORQUE: 39 Nm(4.0 kgf-m, 29 lbf4t) Tighten the 18 mm special nut to an additional0