OMC Oil seal lower.
40 pk year built 1974-1976 1981-1986 50 HP construction year & 1971-80 & 1981-89 55 1976-85 60 HP HP year built 1970 year of manufacture 1968-69 & till 1989 65 HP year built 1971 & 1980-83 & 1972-73 & 1984-89 70 HP year built 1974-85 75 HP year built 1975-84 85 HP year built 1973-80 90 HP 1969-72 & 1981-83 & 1985-90 100 HP year built year built 1971-72 & 1979-80 110 1986-88 115 HP HP year of year of manufacture 1969-83 & 1984-85 125 pk year built 1971-72