Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 192Get this manual
Detent pins are free and can fall out of sliding clutchCare MUST BE taken not to lose pins 4Detent pins are free and can be removed from slid ing clutch at this time
aDetent PinsCross PinSliding Clutch
aCross PinPunch
5Push cross pin out of sliding clutch and propeller shaft ith punch
6Pull sliding cl utch off propeller shaft