2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 117Get this manual
Power unit Flywheel magnet nut: 240 Nm (24 kgfm, 174 ftlb)
30Turn the flywheel magnet clockwise two turns, and then check that all alignment marks are alignedR
28Install the Woodruff key
29Install the flywheel magnetNOTE: Do not turn the flywheel magnet counterclockwise31Check each valve clearance and adjust if necessary
CAUTION:
Apply force in the direction of the arrows shown, to prevent the flywheel holder from slipping off easilyNOTE: Apply engine oil to the flywheel magnet nut before installation