Page 821 - 2021 Sierra Catalog

I/O — MERCRUISER - Cooling System
Liter Model
Note CID # Cyl. Stroke
283 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4 305 8 4
GM 327 8 4 GM 327 8 4 GM 327 8 4 GM 327 8 4
327 8 4 327 8 4 350 8 4 350 8 4
GM 350 8 4 GM 350 8 4 GM 350 8 4 GM 350 8 4
Year Range
1963-1964 1977 1977 1985-1987 1985-1987 1987 1977 1977-1982 1983-1984 1983-1984 1977-1978 1977-1978 1977 1977-1980 1985-1987 1985-1987 1987 1981-1987 1981-1987 1981-1987 1988-1995 1988-2002 1988-2002 2004-2010 1998-2001 1988 2002 2002-2004 2004-2010 1988-1995 1977-1982 1977-1982 1983-1984 1983-1984 1963-1968 1968-1969 1968 1968-1969 1968-1969 1968-1969 1977 1977 1975-1976 1976 1975-1976 1976-1980 1978-1982 1983-1987 1983-1987 1981-1987 1981-1987 1981-1987
Serial # Range Exh. Manifold
Port
1564539 - 1730903
4776402 - 4931099 ❽ 4776402 - 4931009 18-1950-1 6899058 - B525981 18-1953-2 6899058 - B525981 18-1953-2 B525982 - B774444 18-1953-2 4765100 - 4888929
4888930 - 6218461 18-1950-1 6218462 - 6899268 18-1953-2 6218462 - 6899268 18-1953-2 4888930 - 5170008 18-1950-1 4888930 - 5170008 18-1950-1 4765100 - 4888929
4888930 - 5907057 18-1950-1 6899269 - B525981 18-1953-2 6899269 - B525981 18-1953-2 B525982 - B773739 18-1953-2 5907058 - B788151 18-1953-2 5907058 - B788151 18-1953-2 5907058 - B788151 18-1953-2 B774445 - F600999 18-1953-2 L015751 - M599999 18-1953-2 M600000 - W309999
W310000 & UP
L012052 - M299999 18-1953-2 B788152 - C396832 18-1953-2 M300000 - M599999 18-1953-2 M600000 - W309999
W310000 & UP
B773740 - F600900 18-1953-2 4762210 - 6218461 ❽ 4762210 - 6218461 18-1950-1 6218462 - 6899057 18-1953-2 6218462 - 6899057 18-1953-2 1539620 - 2399397
2399398 - 2694014
2278647 - 2399307
2399398 - 2694014
2314301 - 2639854
2314301 - 2639854
4768000 - 4908849 ❽ 4768000 - 4908849 18-1950-1 4175500 - 4499060
4499061 - 4767999 18-1950-1 4175500 - 4499060
4499061 - 5907057 18-1950-1 4908850 - 6218461 18-1950-1 6218462 - B773304 18-1953-2 6218462 - B773304 18-1953-2 5907058 - B788151 18-1953-2 5907058 - B788151 18-1953-2 5907058 - B788151 18-1953-2
Exh. Manifold Starboard
❽ 18-1951-1 ❾ 18-1953-2 18-1953-2 18-1953-2
18-1951-1 18-1953-2 18-1953-2 18-1951-1 18-1951-1
18-1951-1 18-1953-2 18-1953-2 18-1953-2 18-1953-2 18-1953-2 18-1953-2 18-1953-2 18-1953-2
18-1953-2 18-1953-2 18-1953-2
18-1953-2
❽ 18-1951-1 ❾ 18-1953-2 18-1953-2
❽ 18-1951-1 ❾
18-1951-1
18-1951-1 18-1951-1 18-1953-2 18-1953-2 18-1953-2 18-1953-2 18-1953-2
Exh. Elbow
End Cap Front
18-4009 18-4009
18-4009 18-4009
18-4009 18-4009 18-4009 18-4009
End Cap Rear
18-4009 18-4009
18-4009 18-4009
18-4009 18-4009 18-4009 18-4009
Manifold Exh. Elbow Gasket Gasket
18-2949
18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0897 18-2949 18-0897 18-2949 18-2833 18-2949 18-2833 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949
18-2949
18-2949
18-2949 18-2849-1 18-2949 18-0897 18-2949 18-0897 18-2949
18-2949
18-2949 18-0897 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0897 18-2949 18-0897 18-2949
18-2949 18-0885-1 18-2949
18-2949 18-0885-1 18-2949 18-0885-1 18-2949 18-0885-1 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-0885-1 18-2949 18-2833 18-2949 18-2833 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897 18-2949 18-0897
190 5.0L 198 5.0L 198 5.0L 200 5.0L 200 5.0L 200 5.0L 228 5.0L 228 5.0L 228 5.0L 228 5.0L 228 5.0L 228 5.0L 228 5.0L 228 5.0L 230 5.0L 230 5.0L 230 5.0L 230 5.0L 230 5.0L 230
MIE MIE
TR TR MIE MIE
MIE MIE MIE
❾
❽
❾ 18-1970-2 18-1976-2 18-1976-2
18-1971 18-1970-2 18-1976-2 18-1971 18-1971
18-1970-2 18-1976-2 18-1976-2 18-1974-1 18-1970-2 18-1976-2 18-1976-2 18-1976-2
18-1976-2 18-1976-2 18-1976-2
18-1976-2
❽
❾ 18-1970-2 18-1976-2
❽ 18-1971 ❾
18-1971
18-1971 18-1970-2 ❹ 18-1976-2 ❺ 18-1974-1 ❸ 18-1970-2 ❸ 18-1976-2 ❺
5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0L 5.0LX 5.0L 898 5.0L 898 5.0L 898 5.0L 898
5.7L 250 5.7L 250 5.7L 255 5.7L 255 5.7L 255 5.7L 255 5.7L 260 5.7L 260 5.7L 260 5.7L 260 5.7L 260 5.7L 260
❾
225
225
225 MIE 225 MIE 250
250 MIE
GEN + GEN + GEN + EFI GEN + MIE
MPI MPI MPI
MIE MIE
MIE MIE MIE
350 8 4 350 8 4 350 8 4 350 8 4 350 8 4 350 8 4
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
803
❾
18-4009 18-4009
18-4009
18-4009 18-4009 18-4009 18-4009 18-4009 18-4009 18-4009 18-4009 18-4009 18-4009
18-4009 18-4009
18-1990
18-1990 18-1990 18-1990 18-4009 18-4009 18-1990 18-4009 18-1990 18-4009 18-4009
❹ ❺
❹ ❺
❹ ❺
❸ ❹ ❺
❺