MerCruiser 47-86462A1 Impeller 470 170hp 3.7L 4cyl Front Water Pump Cover Risers Notable Parts in this listing:

Notable Parts in this listing:

so they might be fine

FM-XV4B7OF)

3L V6 OMC and Volvo Penta engines from 1986-1993

Years:  1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 19801981 1982 1983 1984 1984 1985 1986 1987 1988 1989 1990 1991 1992  (and possibly others)

MerCruiser 47-86462A1 Impeller 470 170hp 3.7L 4cyl Front Water Pump Cover Risers Notable Parts in this listing:Item Details Removed from a 1983 1984 MerCruiser 470 170hp S N 6777941 Parts Included Impeller Assembly 47 86462 47 86462A1 Compatibility Used only on MerCruiser 470 Models S N 05195054 Roughly 1984 or 1985 or possibly later. Make sure to check what the hole on yours looks like along with the stamped part number. The earliest ones were hex shaped and the latest ones were threaded. 1978 1979 1980 1981 1982 1983 1984 1985 Alpha One 470 4 cyl 170hp 3. 7L