MerCruiser 43-96084A4 Alpha One 1 Lower Unit Gear Set Forward Reverse 1970-1982 Exhaust Manifold and if you are unsure

and if you are unsure if this is right for you

1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1978 1979 1980 1981 1982 1983

but it could be fully functional

Good condition

5L -- 1987-1990

MerCruiser 43-96084A4 Alpha One 1 Lower Unit Gear Set Forward Reverse 1970-1982 Exhaust Manifold and if you are unsureItem Details MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset 43 96084A4 (Pinion, Forward, Reverse) & Bearing Carrier Used in MerCruiser MC 1, #1, "R Drive" lower units 1970 1982 (If your driveshaft HAS A PRELOAD PIN then these are the correct parts, if your's does NOT have a preload pin, then these are NOT the correct gears) The time period 1970 1982 should be the time period that covers when the drives still had the preload pin, but the