Page 819 - 2021 Sierra Catalog

I/O — MERCRUISER - Cooling System
18-0720
DRY JOINT GASKET (CLOSED) Replaces: 27-864549A02, 27-864549A1
Fits: 4.3L, 5.0L, 5.7L, 6.2L utilizing the Dry Joint Manifold and Riser
Used with: 18-1843, 18-1842 Manifolds & 18-1845 Riser
➀18-4218D
18-4218
DRAIN TAP
Replaces: 22-87238, 22-16951A1, 22-64426, 22-16951Q1
1/4" NPT
18-3223-9➁
Bulk pack of 12
18-4227
DRAIN ELBOW
Replaces: 22-806926, 22-862210
Liter Model Note
2.5L 120
2.5L 120
2.5L 120
2.5L 120
2.5 120
2.5L 2.5L
3.0L 140
3.0L 140
3.0L 140
3.0L 140
3.0L 3.0L
3.0L 3.0L
3.0L 3.0L
3.0L 3.0L
3.0L 3.0LX
3.0L 3.0L MPI / 3.0L EC
150
160 3.7L 165 3.7L 165 3.7L 165 3.7L 170 3.7L 170 3.7L 180
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
18-0721
DRY JOINT GASKET (OPEN)
Replaces: 27-864547A02, 27-864547A1
Fits: 4.3L, 5.0L, 5.7L, 6.2L utilizing the Dry Joint Manifold and Riser
Used with: 18-1843, 18-1842 Manifolds & 18-1845 Riser
➀18-4224D
18-4224
DRAIN ELBOW
ASSEMBLY
Replaces: 22-806926A1, 22-862210A01 3/4” NPT
18-4461 HOSE BARB
Replaces: 22-807155
3/4" - 14 NPT x 1" Hose Corrosion-Resistant Brass Fitting
18-0722
DRY JOINT GASKET (RESTRICTED) Replaces: 27-864850A02, 27-864547A1
Fits: 4.3L, 5.0L, 5.7L, 6.2L utilizing the Dry Joint Manifold and Riser
Used with: 18-1843, 18-1842 Manifolds & 18-1845 Riser
18-4226
DRAIN PLUG
Replaces: 22-806608A1, 22-806608A02
18-8216
HOSE BARB
Replaces: 22-36305, 22-36305T
3/4”- 14 NPT x 1” hose barb
Fits: Mercruiser- V6 (229 and 262ci),Small Block V8 (305-350ci), Big Block V8 (454ci)
➀ Items ending in "D" are Display Packaged - Regular number is Non-Display ➁ Priced per Package
MANIFOLD/MANIFOLD GASKET APPLICATION
CID # Cyl. Stroke
153 4 4 153 4 4 153 4 4 153 4 4 153 4 4 153 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4 181 4 4
4 4
4 4 224 4 4 224 4 4 224 4 4 224 4 4 224 4 4 224 4 4
Year Range
1966-1982
1983-1986 1987-1989 1968-1982
1983-1986 1990-1994 1987-1989 1998-2003 2003-2010 1990-1997 2008-2010
1987 1987
1985-1986 1985-1986 1987
Serial # Range Exh. Exh. Manifold Manifold
Port Starboard
2046625 - 6229717
2324347 - 3377340
3377341 - 5192408
5192049 - 6229717
6229718 - B5311853
B531854 - C853255 18-1956-3 2508261 - 6229717 18-1955-1 3332138 - 5157668 18-1955-1 5157669 - 6229717 18-1955-1 6229718 - B450800
C856559 & UP 18-1956-3 B450801 - C856558
L010042 - M679999 18-1956-3 M680000 & UP 18-1956-3 C856559 - K999999 18-1956-3 A072812 & UP
1666495 - 2048046
2048022 - 2770031
B434941 - B774251 ❶ B434941 - B774251 ❷ 2770032 & up 18-1960-1 6916779 - B434940 ❶ 6916779 - B434940 ❷ B436391 - B775248 ❶
Exh. Elbow
18-1971
18-1975-1 18-1975-1 18-1975-1 18-1975-1 18-1975-1 18-1975-1
18-1937
18-1937
18-1937
End Cap Front
18-4009 18-4009 18-4009
18-4009 18-4009 18-4009 18-1990
18-1990
End Cap Rear
18-1995 18-1995 18-1995
18-4009 18-1990 18-4009 18-4009
Manifold Gasket
27-52546 18-2896-1 18-2896-1 18-2896-1 18-1204-1 18-1204-1 18-2912-1 18-1203 18-1203 18-1204-1 18-1204-1 18-1204-1 18-1204-1 18-0680 18-0680 18-0680 18-2830-1 18-2830-1 18-0956-1 18-0956-1 18-2830-1 18-0956-1 18-0956-1 18-0956-1
Exh. Elbow Gasket
18-2819-1 18-2819-1 18-2819-1 18-2819-1 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833 18-2833
18-0881-1
18-2833 18-0881-1 18-0113-1 18-0881-1
18-4009
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
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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