Sierra Marine Parts Catalog

786 I/O — MERCRUISER - Cooling ❶ For engines with aluminum exhaust manifolds ❷ For engines with cast iron exhaust manifolds ❸ 3” (76mm) O.D. & 0 degree down angle ❹ 3” (76mm) O.D. & 15 degree down angle ❺ 4” (102mm) O.D. ❻ 2 piece exhaust manifold ❼ 1 piece exhaust manifold ❽ Has a rectangular elbow mounting bolt pattern ❾ Has a square elbow mounting bolt pattern ❿ In-line applications ➀ V-drive applications ➁ Standard rise ➂ 2” (51mm) rise ➃ 3” (76mm) rise ➄ 6” (152mm) rise ➅ Port ➆ Starboard ➇ Engines with risers or closed cooling may require a different gasket than listed ➈ Exhaust manifold with external water rail ➉ Exhaust manifold w/o external water rail ☛ 1 piece exhaust manifold is nla. Rngine must be converted to the 2 piece exhaust system ♠ Engines with easy drain system ♣ Engines with multi-point drain system ♥ Intermediate collector housing MANIFOLD/MANIFOLD GASKET APPLICATION (Cont.) Liter Model Note CID #Cyl. Stroke Year Range Serial # Range Exh. Manifold Port Exh. Manifold Starboard Exh. Elbow End Cap Front End Cap Rear Manifold Gasket Exh. Elbow Gasket 5.7L 270 350 8 4 1969-1972 2851074 - 3385720 18-4009 18-1990 18-2949 18-0885-1 5.7L 270 MIE 350 8 4 1969-1972 2851074 - 3077735 18-4009 18-1990 18-2949 18-0885-1 5.7L 280 TRS 350 8 4 1975-1976 4176250 - 4770199 ❽ ❽ ❽ 18-4009 18-1990 18-2949 18-0885-1 5.7L 280 TRS 350 8 4 1975-1976 4176250 - 4770199 18-1950-1 ❾ 18-1951-1 ❾ ❾ 18-4009 18-4009 18-2949 18-2833 5.7L 300 350 8 4 1985-1986 6668677 - B4300367 18-1953-2 18-1953-2 18-2949 18-2849-1 5.7L 320 EFI 350 8 4 1987-1989 A543604 - C622418 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 5.7L 350 MAG ALPHA 350 8 4 1986-1997 A635178 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 5.7L 350 MAG ALPHA / 350 8 4 1996-1997 F800300 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 350 MAG EFI 5.7L 350 MAG BRAVO / 350 8 4 1995 F415189 - F601999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 350 MAG MPI 5.7L 350 MAG BRAVO GEN + / 350 8 4 1996-1997 F602000 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 350 MAG MPI GEN + 5.7L 350 MAG EFI / 350 8 4 1994-1996 F215561 - F820706 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 350 MAG SKI 5.7L 350 MAG EFI GEN + / 350 8 4 1996-1997 F820707 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 350 MAG SKI GEN + 5.7L 350 MAG MPI 350 8 4 1998-2001 L010019 - M299999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 5.7L 350 MAG MPI 350 8 4 2002 M300000 - M599999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 5.7L 350 MAG MPI 350 8 4 2002-2004 M600000 - W309999 18-2949 5.7L 350 MAG MPI 350 8 4 2004-2010 W310000 & UP 18-2949 5.7L 350 MAG MPI / 350 8 4 2002 M300000 - M599999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 350 MAG HORIZON 5.7L 350 MAG MPI / 350 8 4 2002-2004 M600000 - W309999 18-2949 350 MAG HORIZON 5.7L 350 MAG MPI / 350 8 4 2004-2007 W310000 - A299999 18-2949 350 MAG HORIZON 5.7L 350 MAG MPI / 350 8 4 1999-2001 L304700 - M299999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 350 MAG HORIZON / 350 MAG MIE 5.7L 350 MAG MPI / 350 8 4 2002 M300000 - M316999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 350 MAG HORIZON / 350 MAG MIE 5.7L 350 MAG MPI / 350 8 4 2002-2007 M317000 - A089999 18-2949 350 MAG HORIZON / 350 MAG MIE 5.7L 350 MAG MPI / 350 8 4 1998-2001 L002008 - M299999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 350 MAG MIE 5.7L 350 MAG MPI 350 8 4 2002 M300000 - M316999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 / 350 MAG MIE 5.7L 350 MAG MPI 350 8 4 2002-2007 M317000 - A089999 18-2949 / 350 MAG MIE 5.7L 350 MAG MPI 350 8 4 1995-1996 F350583 - F799999 18-1953-2 18-1953-2 18-1976-2 18-2949 / 350 MAG SKI 5.7L 350 MAG MPI GEN + 350 8 4 1998-2001 L002600 - M299999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-2849-1 / 350 MAG SKI GEN + 5.7L 350 MAG MPI GEN + 350 8 4 2002 M300000 - M316999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 / 350 MAG SKI GEN + 5.7L 350 MAG MPI GEN + 350 8 4 2002-2007 M317000 - A089999 ❿ 18-2949 18-0897 / 350 MAG SKI GEN + 5.7L 350 MAG MPI GEN + 350 8 4 2002-2007 M317000 - A089999 ➀ 18-2949 / 350 MAG SKI GEN + 5.7L 350 MAG SKI 350 8 4 1991-1997 D505450 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897 5.7L 5.7L 350 8 4 1988-1997 B773305 - K999999 18-1953-2 18-1953-2 18-1976-2 18-2949 18-0897