MerCruiser 43-37964 43-55812 43-35930 Forward Reverse Pinion Gear Alpha1 1965-73 Controls 1965 1966 1967 1968 1969

1965 1966 1967 1968 1969 1970 1971 1972 1973 1974

828793 Dipstick

For the 1978-1983 Stringer gearcases

100 HP -- 1988 & Newer

You need different ones if you are using oversize pistons

MerCruiser 43-37964 43-55812 43-35930 Forward Reverse Pinion Gear Alpha1 1965-73 Controls 1965 1966 1967 1968 1969Early Style MerCruiser Pre Alpha One Gearcase Lower Unit Gear Set Roughly 1965 to the early 1970's Part Number(s) Included 43 55812 43 35922 (Pinion Gear) (19 Teeth. If it has 20 teeth it is the 1973 1977 gear set) 43 37964 (Reverse Gear) 43 35930 43 35930A2 (Forward Gear) General Application Compatibility MerCruiser Sterndrive Alpha One Lower Unit Complete Gear set That was generally found in 1965 Early 1970's models (Pinion, Forward, Reverse)