51220 Generation 2 Manifold 99746A17

Mercruiser and Alpha 1 (1983 – 1989, serial numbers 6330183 – OD469858)

Generation 2 models (1991 and up, serial numbers OD469859 – up)

185 (4bbl.) 229/V6 (1983-84, S/N 6330183-6919655)
175 262/V6 (1987-87, S/N 0B527955-0B773242)
185 (2bbl.) 262/V6 (1985-86, S/N 0A331455-0B527954)
205 262/V6 (1985-86, S/N 0A331455-0B527954)
262 Mag EFI 262/V6 (1996-1997, S/N 0F803800-0K999999)
4.3L 262/V6 (1988-96, S/N 0B773243-0F802999)
4.3L 262/V6 (1998-01, 0L010044 & Up)
4.3L EFI 262/V6 (1998-01, S/N 0L012009 & Up)
4.3L MPI 262/V6 (2001-01, 0M300000 & Up)
4.3LH 262/V6 (1998-01, S/N 0L010044 & Up)
4.3 LX (4bbl.) 262/V6 (1988-96, S/N 0B775130-0F802999)
4.3LX (2bbl.) 262/V6 (1996-01, S/N 0F803800-0K999999)
4.3LXH 262/V6 (1996-97, S/N 0F803814-0K999999)