Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 248Get this manual
MANUAL STARTER
10Remove starter interlock screw, lockwasher, flat washer, spring, collar (hidden) and cam11Remove screw, washer, spring, collar, and starter lock
aStarter Interlock Screw b- LockwasherFlat Washer d- SpringCollar (hidden)CamScrewWasherSpringCollarStarter Lock