Fits the following engines: MerCruiser Applications Hp/Model Serial #Years 140 (GM 3.0L, 181 cid, Inline 4)2508261 - 6229717 1968 - 1982 140 (GM 3.0L, 181 cid, Inline 4)6229718 - 0B450800 1983 - 1986 3.0L (GM 3.0L, 181 cid, Inline 4)0B450801 - 0C8565581987 - 1989 470 (Merc 3.7L, 224 cid, Inline 4)4208730 - 69167781976 - 1984 485 (Merc 3.7L, 224 cid, Inline 4)5685394 - 62180361980 - 1982 488 (Merc 3.7L, 224 cid, Inline 4)6170297 - 69167781983 - 1984 160 (GM 4.1L, 250 cid, Inline 6)2048022 - 27700311967 - 1969 165 (GM 4.1L, 250 cid, Inline 6)2770032 - 58134331970 - 1981 200 (GM 4.1L, 250 cid, Inline 6)2453769 - 27120721969 OMC Applications: Hp/Model Years 100 (GM 2.5L, 153 cid, Inline 4) 1972 - 1973 110 (GM 2.5L, 153 cid, Inline 4)1964 120 (GM 2.5L, 153 cid, Inline 4)1965 - 1985 140 (GM 3.0L, 181 cid, Inline 4)1973 - 1987