Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 34Get this manual
4FLYWHEELELECTRICAL EOUIPMENT [31 FLYWHEEL
aDISASSEMBLY REASSEMBLY
FLYWHEEUIGNITION COIL
121 14 mm SPECIAL NUT
DISASSEMBLYREASSEMBLY:When loosening or tightening, hold the crankshaft by inserting screwdriver or equivalent into the hole in the starter pulley[I] STARTER PULLEY
Align the dowel boss on the pulley with the hole in the flywheel
DISASSEMBLY: Remove by using PULLER
FLWHEEL
FLYWHEEL PULLER
70-80 N-m (700-800 kg-cm, 51-! ft-lb)
REASSEMBLY: Clean the tapered surface on the crankshaft and install by aligning keyway with the woodruff key on the crankshaft
REASSEMBLY: Screw the switch into the steering handle before routing the wire through the hole in the engine housing