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MerCruiser Alpha one applications from the 1960's-1990's
150hp GM 230 I/L6 1964-1966 1666495 THRU 2048046
8L 351) applications from 1977-1990
Removed from a 1981 Mercury Mariner 80hp "800" 4cyl Outboard (Serial Number 5894097)
MerCruiser 52-37963 37967 Spool Pre-Alpha One 1965-70 Early Sliding Clutch Dog Flywheel MerCruiser Alpha one applications fromItem 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