MerCruiser 52-37963 37967 Spool Pre-Alpha One 1965-70 Early Sliding Clutch Dog Valve Covers This was used on 1979-1991

This was used on 1979-1991 Various 25hp-50hp Force Models (and possibly others)

Kill switch is still installed on plate

Was used on 65hp 650 80hp 800 85hp 850

Make sure to check and see that the number on your bearing is the same

Please see your parts diagram or the back of your gauge for ultimate confirmation

MerCruiser 52-37963 37967 Spool Pre-Alpha One 1965-70 Early Sliding Clutch Dog Valve Covers This was used on 1979-1991Item Details MerCruiser Sliding Propeller Prop Shaft Clutch dog 52 37963 used ONLY in MerCruiser IA IB IC & EZ Shift 120hp 140hp 160hp 165hp & 888 (188hp Ford 302) Roughly 1965 Very Early 1970's Also here is MerCruiser Shift Spool 37967 37969 (For Use with the 37966 shift crank which has boxy end on one side rather than two hoops like the newer ones) Actual Serial numbers are outlined below. One way to know is if your propeller shaft is not tapered at