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Mercruiser Cooling System
Water Intake Hose - Special Order est. 10 DaysWARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Sierra 18-3646 Thermostat Kit Replaces 807252Q3 - MW
Mercruiser Thermostats & Gaskets
Sierra 18-3646 Mercruiser 140 Degree Thermostat Kit Sierra high-quality replacement engine parts are designed for OEM specifications. For 1982 & older Ford & GM V-8 engines with standard cooling and 1... More Details
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Sierra 18-3647 MerCruiser 1987 & Newer 160° Thermostat Kit - MW
Mercruiser Thermostat Housing
Sierra 18-3647 160° MerCruiser Thermostat Kit Replaces 807252Q5 Features: Fits: 1987 & newer GM engines with standard cooling Temperature Rating: 160°F Kit Includes: Sie-18-3649 Thermostat Sie-18-2844... More Details
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Sierra 18-3648 Mercruiser 160 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications. Temperature Rating: 160° Kit Contains: (1) 18-3649 Thermostat (1) 18-2553... More Details
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Sierra 18-3650 MerCruiser 1998 & Older Thermostat Kit - MW
Mercruiser Thermostat Housing
Sierra 18-3650 Mercruiser 140 Degree Thermostat Kit For Mercruiser Sterndrive engines using 140 degree thermostat. Fits 1998 & older MCM GM In-Line 4 & 6 cylinder engines. Kit Includes: (1) 18-2831 T... More Details
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Sierra 18-3651 Mercruiser 142 Degree Thermostat Kit Sierra high-quality engine parts are designed to meet OEM specifications. Temperature Rating: 142 degrees Kit Includes: (1) 18-2553 Thermostat Cover... More Details
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Sierra 18-3652 Mercruiser 160 Degree Thermostat Kit Sierra high-quality replacement thermostat kit for Mercruiser Stern Drives. 160 Degree Temperature Rating Kit Contains: (1) 18-2555 Thermostat Cover... More Details
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Thermostat Kit for Mercruiser Engines 160 degree Includes thermostat (18-2555) and gasket (18-3555) Replaces: OEM 27-89656-1 (Gasket) and 99155A-1 (Thermostat) WARNING: Cancer and Reproductive Harm - ... More Details
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Sierra 18-3668 MerCruiser V6/V8 1983 & Newer 142° Thermostat Kit - MW
Mercruiser Thermostat Housing
Sierra 18-3668 Thermostat Kit for Mercruiser Stern Drives For Mercruiser engines using 142 degree thermostats Fits 1983 & newer GM V-6 & V-8 engines with standard cooling Includes: (1) Thermostat Cove... More Details
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Sierra 18-4224 MerCruiser V6/V8 Drain Manifold Elbow Assembly - MW
Mercruiser Exhaust Manifolds
Sierra 18-4224 MerCruiser V6/V8 Drain Elbow Assembly Sierra high-quality engine parts are designed to meet OEM specifications. Features: Includes Drain 3/4" NPT Fits MCM/MIE V-6 & V-8 engines with ce... More Details
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Sierra 18-4226 MerCruiser Drain Plug - MW
Mercruiser Exhaust Manifolds
Sierra 18-4226 MerCruiser Blue Plastic Drain Plug This Sierra 18-4226 drain plug is widely used for MerCruiser V4, V6 and V8 marine engines. Fits MerCruiser cylinder blocks and exhaust manifolds Comes... More Details
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Sierra 18-4227 Drain Elbow Sierra replacement drain elbow for Mercruiser Stern Drives. Interchangeable with: GLM 13991 Mallory 9-41202 Mercruiser Stern Drive 22-806926 22-862210 WARNING: Cancer and Re... More Details
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Sierra 18-43015 Mercruiser Thermostat Sierra replacement thermostat for Mercruiser Stern Drives. Fits: MCM 4.3L, 5.0L, 5.7L & 6.2L MPI engines w/dry joint exhaust & closed cooling Temperature Rating: ... More Details
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Sierra 18-4349 MerCruiser 5.0L/5.7L Exhaust Manifold Gasket Set - MW
Mercruiser Exhaust Manifolds
Sierra 18-4349 Mercruiser V8 Exhaust Manifold Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. For GM 200, 228, 230, 260, 898 (5.0 & 5.7L). Set Contains: (2) 18-087... More Details
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Sierra 18-4367 MerCruiser 2.5L/3.0L Exhaust Manifold Gasket Set - MW
Mercruiser Exhaust Manifolds
MerCruiser 4Cyl Exhaust Manifold Gasket Set by Sierra For GM 153 & 181 (2.5 & 3.0L) CID Engines; 120 & 140 HP - S/N 6229718 & UP (With Siamese Port Cylinder Heads) Interchangeable with: Barr MC47-27-9... More Details
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Sierra 18-4396 MerCruiser 165 GM 250 2770032 & Up Exhaust Manifold Gasket Set - MW
Mercruiser Exhaust Manifolds
Sierra 18-4396 Exhaust Manifold Gasket Set Sierra replacement exhaust manifold gasket set for Mercruiser Stern Drives For 250 (4.1L) CID engines; 165 hp s/n 2770032 & up Set Contains: (1) 18-0353 Carb... More Details
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Sierra 18-5520 V-8 Electronic Distributor Conversion Kit - MW
Mercruiser V-Belts
Sierra 18-5520 V-8 Electronic Distributor Conversion Kit Converts 8 cyl. GM engines to electronic. Contains: (1) 18-5435 Ignition Coil (1) 18-8803-2 Spark Plug Wire Set (1) 18-5494-2 Dist. Chev V8 Ele... More Details
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Sierra 18-70925 Molded Hose for Mercruiser Stern Drives. Replacement molded hose for Mercruiser Stern Drives. For Thermostat Cover to Port Manifold. Fits MCM/MIE V-6 & V-8 (305 & 350 cid) engines. Int... More Details
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Sierra 18-70926 Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-8 (305 & 350 CID) engines For Thermostat cover to exhaust elbow Interchangeable... More Details
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Molded Hose - Special Order est. 10 DaysWARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Sierra 18-70930 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For connecting water distribution block to end cap. Fits GM in-line 4 & 6 cyl. Intercha... More Details
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Sierra 18-70931 Molded Hose For MerCruiser Stern Drives Sierra high-quality replacement parts are designed to meet OEM specifications. This molded hose is for connecting the distribution block to the ... More Details
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Sierra 18-70932 Molded Hose Thermostat To Starboard Manifold - MW
Mercruiser Hoses
Sierra 18-709325 Molded Hose for Mercruiser Sierra high-quality replacement molded hose for Mercruiser Stern Drives. Used for thermostat cover to starboard manifold. Fits 4.3L/LX & MCM/MIE V-8 (305 & ... More Details
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Sierra 18-70934 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-8 (427, 454 & 502 CID) engines. Interchangeable with: Mallory 9-44051... More Details
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Sierra 18-70935 MerCruiser 4.3/5.0/5.7L Molded Hose - MW
Mercruiser Hoses
Sierra 18-70935 Molded Hose for Mercruiser Stern Drives Sierra replacement molded hose for Mercruiser Stern Drives. For oil cooler to thermostat housing. Fits 4.3L/LX, 5.0 L/LX, 5.7 L/LX & 350 Mag Int... More Details
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Sierra 18-70938 Exhaust Manifold Molded Hose Sierra replacement exhaust manifold molded hose for Mercruiser Stern Drives. For thermostat housing to port exhaust manifold Fits MCM/MIE GM V06 & V-8 (305... More Details
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Sierra 18-70939 Mercruiser Exhaust Manifold Molded Hose Sierra high-quality replacement exhaust manifold molded hose for connecting thermostat housing to starboard exhaust manifold. Fits MCM/MIE GM V-... More Details
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Sierra 18-70940 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For Thermostat housing to port exhaust manifold. Fits MCM V-6 & V-8 (305, 350 & 377 cid... More Details
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Sierra 18-70943 Molded Hose Therm To Port Exhaust Manifold - MW
Mercruiser Hoses
Molded Hose for thermostat housing to port exhaust manifold Fits: 7.4L 454 Mag 502 Mag Replaces: Mercury 32-89749-1 WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Molded Hose - Special Order est. 10 DaysWARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Sierra 18-70947 Molded Hose Sierra replacement molded hose for Mercruiser Stern Drives. For: Thermostat housing to starboard manifold with 2 piece exhaust manifold Fits: 4.3L (Gen+) (1998-07) (S/N 0L... More Details
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Sierra 18-70948 Mercruiser Molded Hose Sierra 18-70948 Molded Hose is for cooler to thermostat housing. Sierra high-quality replacement engine parts are designed to meet OEM quality. Fits MCM/MIE V-6 ... More Details
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Sierra 18-70949 Molded Hose Sierra replacement molded hose for Mercruiser Stern Drives. Fits 454 Mag MPI (Gen VI) (1996-01), 7.4LX MPI Bravo(Gen VI) (1996-97), 502 Mag MPI (Gen VI) (1996-01) For coole... More Details
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Molded Hose - Special Order est. 10 DaysWARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Sierra 18-70954 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For use for oil cooler to oil cooler. Fits 5.0L, 5.7L/LX, 350 Mag & MX 6.2L MPI Interch... More Details
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Sierra 18-70955 Molded Hose Molded Hose for Mercruiser V8 (305, 350 & 454 CID) used for thermostat cover to exhaust elbow applications. Fits: MC200/230 (1987) 5.0L Alpha (1988-95) 5.0LX Alpha (1988-95... More Details
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Molded Hose - Special Order est. 10 DaysWARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov More Details
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Sierra 18-70958 Molded Hose Sierra replacement molded hose for Mercruiser Stern Drives. For transom to oil cooler Fits MCM GM V-8 (305, 350 & 454 CID) engines Interchangeable with: Mallory 9-44074 Mer... More Details
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Sierra 18-710-12-2 Hose Clamp 11/16" - 1-1/4" - MW
Mercruiser Serpentine Belts
Sierra 18-710-12-2 Hose Clamp 11/16" - 1-1/4" Diameter Size: 11/16" to 1 1/4" Std #: 012 Material: Marine Grade 316 stainless steel Sold individually Interchangeable with: Mercruiser Stern Drive 54-81... More Details
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Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4" - MW
Mercruiser Serpentine Belts
Sierra 18-710-20-2 Hose Clamp 13/16" - 1-3/4" Material: Marine Grade 316 stainless steel Diameter: 13/16" to 1 3/4" Std #: 020 Sold individually Interchangeable with: Mercruiser Stern Drive 54-32780 5... More Details
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Sierra 18-8520 Exhaust Manifold Mounting Kit - MW
Mercruiser Exhaust Manifolds
Sierra 18-8520 Mercruiser Exhaust Manifold Mounting Kit Sierra high-quality engine parts are designed to meet OEM specifications. For GM Small Block V8 305-350 cu. in. (Models: 198, 200, 228, 230, 260... More Details
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Sierra 18-8530 Exhaust Elbow Mounting Kit - MW
Mercruiser Exhaust Manifolds
Sierra 18-8530 Mercruiser Exhaust Elbow Mounting Kit Sierra replacement exhaust elbow mounting gasket for Mercruiser engines. For: Mercruiser 4 cyl. 224 cu. in. 3.7L (models 165, 170, 180 & 190) Use w... More Details
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Sierra 18-8532 Exhaust Manifold Mounting Kit - MW
Mercruiser Exhaust Manifolds
Sierra 18-8532 Exhaust Manifold Mounting Kit Sierra Exhaust Manifold Mounting Kit for use on Mercruiser GM Big Block V-8 454 cu. in. (models 330, 340 & 7.4L). Use with: 18-1957-1 Manifold Interchangea... More Details
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Sierra 18-8533 Exhaust Manifold Mounting Kit - MW
Mercruiser Exhaust Manifolds
Sierra 18-8533 Mercruiser Exhaust Manifold Mounting Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser GM V6 229 and 262cu in. (Models 185 and 205). Used with... More Details
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Sierra 18-8551 Hardware Kit [Exhaust Elbow Bolts] - MW
Mercruiser Cooling System
Sierra 18-8551 Hardware Kit [Exhaust Elbow Bolts] Sierra exhaust elbow hardware kit for Mercruiser Stern Drives. Contains: Two bolts and two washers Use with: Sierra 18-1975-1 Riser Interchangeable wi... More Details
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Sierra 1981-2002 MerCruiser V8 Big Block GM Exhaust Manifold Kit - MW
Mercruiser Exhaust Manifolds
Sierra 1981-2002 MerCruiser V8 Big Block GM Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep you... More Details
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Sierra 1983-2002 MerCruiser V8 Small Block GM Exhaust Manifold Kit - MW
Mercruiser Exhaust Manifolds
Sierra 1983-2002 MerCruiser V8 Small Block GM Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep y... More Details
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Sierra 1985-2002 MerCruiser V6 GM Exhaust Manifold Kit - MW
Mercruiser Exhaust Manifolds
Sierra 1985-2002 MerCruiser V6 GM Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep your boat run... More Details
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Sierra 2002 & Newer MerCruiser V6 Dry Joint Exhaust Manifold Kit - MW
Mercruiser Exhaust Manifolds
Sierra 2002 & Newer MerCruiser V6 Dry Joint Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep you... More Details
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Sierra 2002 & Newer MerCruiser V8 Dry Joint Exhaust Manifold Kit - MW
Mercruiser Exhaust Manifolds
Sierra 2002 & Newer MerCruiser V8 Dry Joint Exhaust Manifold Kit Boat exhaust manifolds are an important part of your boat and maintaining, repairing, or replacing these parts is important to keep you... More Details
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