Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 58Get this manual
IGNITION SYSTEM
3Secure flywheel holder to flywheel with boltsLoosen flywheel nut until nut is flush with end of crankshaftDo not remove nut at this time91-804552
aFlywheel HolderBolts (3) 4Thread flywheel puller into flywheel holderWhile holding flywheel, tighten puller against crankshaft until flywheel loosensRemove flywheel holderpullerRemove flywheel nutRemove flywheel