2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 82Get this manual
Power unit 18Install the stator assembly and Woodruff key19Install the flywheel magnet4Disconnect the throttle cable and shift cable5Disconnect the fuel hose and shift position switch coupler6Disconnect the cooling water pilot hose, canister hose, and flushing hose7Remove the oil dipstick8Remove the apron 1, and then remove the power unit by removing the bolts 2 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