Page 825 - 2021 Sierra Catalog

I/O — MERCRUISER - Cooling System
Liter Model Note
CID # Cyl. Stroke
454 8 4 454 8 4 482 8 4 496 8 4 496 8 4 496 8 4 496 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 502 8 4 540 8 4 540 8 4 540 8 4 540 8 4 540 8 4 540 8 4 540 8 4 540 8 4 540 8 4
Year Range
1996-1997 1996-1997 1969-1970 2001-2003 2001-2010 2001-2003 2001-2010 1990-1994 1990-1994 1990-1994 1994-1998 1994-1998 1994-1998 1999 1999 1999 1990-1993 1993-1995 1996-1997 1998-2001 1991-1996 1991-1996 1990-1996 1996-1997 1998-2001 1990-1998 1990-1998 1990-1998 1999-2001 1999-2001 1999-2001 1990-2001 1990-2001 1990-2001
Serial # Range
F820000 - K999999 F602010 - K999999 2781129 - 3042731 M025000 - M687143 M0225000 & UP M026000 - M319190 M026000 & UP C849992 - F213244 C849992 - F213244 C849992 - F213244 F213293 - L001772 F213293 - L001772 F213293 - L001772 L414639 - L601036 L414639 - L601036 L414639 - L601036 C878221 - F114528 D840650 - F802599 F802600 - K999999 L017000 - M024999 D456489 - F877642 D456489 - F877642 C878221 - F819619 F819620 - K999999 L002450 - L674200 C577254 - L001607 C577254 - L001607 C577254 - L001607 L414620 - M050281 L414620 - M050281 L414620 - M050281 C577254 - M050261 C577254 - M050261 C577254 - M050261
Exh. Manifold Port
18-1957-2 18-1957-2
Exh. Manifold Starboard
18-1957-2 18-1957-2
➈ ➉ ➈ ➉
Exh. Elbow
18-1976-2 18-1976-2
➁
➁
➁
➁
➁
➃
➄
➁
➃
➄
➁
➃
➄ 18-1976-2 18-1976-2 18-1976-2 18-1976-2
18-1976-2 18-1976-2 18-1976-2 ➁
➃ ➄ ➁ ➃ ➄ ➁ ➃ ➄
End Cap Front
18-1990
End Cap Rear
18-1990
Manifold Exh. Elbow Gasket Gasket
18-0418 18-0897 18-0418 18-0897 18-0418 18-0885-1 18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418 18-0897 18-0418 18-0897 18-0418 18-0897 18-0418 18-2849-1 18-0418
18-0418
18-0418 18-0897 18-0418 18-0897 18-0418 18-2849-1 18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
18-0418
7.4L 7.4LX BRAVO EFI 7.4L 7.4LX BRAVO MPI
390 MCM / 390 MIE 496 MAG / 496 HO 496 MAG / 496 HO 8.1S / 8.1 HO / 8.1 MIE 8.1S / 8.1 HO / 8.1 MIE
8.2L 465
8.2L 465
8.2L 465
8.2L 500
8.2L 500
8.2L 500
8.2L 500
8.2L 500
8.2L 500
8.2L 502
8.2L 502
8.2L 502
8.2L 502
8.2L 600
8.2L 600
8.2L 8.2L MIE
8.2L 8.2L MIE / 8.2L MPI 8.2L 8.2L MIE / 8.2L MPI
BRAVO BRAVO BRAVO
GEN +
GEN +
GEN +
MAG BRAVO MAG EFI MAG MPI MAG MPI SC
18-1957-2 18-1957-2 18-1957-2 18-1957-2
18-1957-2 18-1957-2 18-1957-2
18-1957-2 18-1957-2 18-1957-2 18-1957-2
18-1957-2 18-1957-2 18-1957-2
SC
500 BULLDOG W/BRAVO 500 BULLDOG W/BRAVO 500 BULLDOG W/BRAVO 500 BULLDOG W/BRAVO 500 BULLDOG W/BRAVO 500 BULLDOG W/BRAVO 500 BULLDOG W/SSM 500 BULLDOG W/SSM 500 BULLDOG W/SSM
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
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.)
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
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