Mercruiser Thermostats & Gaskets

Sierra 18-3647 160° MerCruiser Thermostat Kit Replaces 807252Q5 Kit Includes: Sie-18-3649 Thermostat Sie-18-2844 Thermostat Cover Gasket Sie-18-2552 Thermostat Cover Gasket Sie-18-2553 Thermostat Cover Gasket Sie-18-7173 O-Ring Sie-18-2917...

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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 Cover Gasket (18-2552) (1) Thermostat...

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Sierra 18-3551 142 Degree Thermostat for Mercruiser, Crusader,PCM When needing to replace your thermostat, we recommend Sierra high-quality engine parts as they are designed to meet OEM specifications at an economical price. The Sierra thermostats are...

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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 Thermostat Gasket (1) 18-3550...

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Sierra 18-3569 Mercury Thermostat Kit  Sierra replacement thermostat kits are designed to meet OEM specifications. This kit fits various Mercury/Mariner 70-125 HP 2 cycle outboards (1987 and newer). Temperature rating: 120°F Kit...

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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 Thermostat Cover Gasket (1)...

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Sierra 18-3649 Thermostat Sierra 18-3649 Thermostat is a replacement part for Mercruiser Stern Drives. All Sierra engine parts are manufactured to meet or exceed OEM requirements. Temperature Rating: 160°F For: Fresh water cooling Fits: 1987...

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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 1996 & older hi-performance models. Fits...

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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 Gasket (1) 18-2554 Thermostat Cover...

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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)

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Sierra 18-3550 Mercruiser 140 Degree Thermostat Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives and Chrysler/Force/US Marine engines. 140 Degree Temperature Rating Fits Mercruiser 120/2.5L...

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Sierra 18-1977-1 Mercruiser Thermostat Housing Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-6 & V-8 (305 & 350 cid) engines & Hi-Perf 454, 502 & 540 cid engines. Interchangeable...

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Sierra 18-43017 Thermostat Sierra replacement thermostat for Indmar GM and Ford Raw Water Cooled Engines. Fits: MCM 496 Mag & HO and MIE 8.1L & HO 160° Interchangeable...

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Sierra 18-0158 Mercruiser Intake Manifold Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Fits Mercruiser Stern Drives. Fits MCM 3.7L engines (1976-1989). Interchangeable...

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Sierra 18-3555 Mercruiser 160 Degree Thermostat Sierra replacement thermostat for Mercruiser Stern Drives Temperature Rating: 160°F Fits 1998 & newer GM V-6 & V-8 engines with closed cooling Use with: 18-3568 Thermostat...

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Sierra 18-3557 Thermostat Sierra replacement 143° thermostat for Chrysler/Force/US Marine, Johnson/Evinrude Outboards, Mercrusier Stern Drives, and Volvo Penta engines. Fits MCM GM in-line 6 cylinder Use with: 18-3669 Thermostat...

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Sierra 18-3568 Thermostat Kit Sierra replacement thermostat kit for Mercruiser Stern Drives. Temperature Rating: 160° Fits GM V-6 & V-8 engines with closed cooling (1998 & newer) Kit Contains: (1) 18-3555 Thermostat (1) 18-1508...

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Quicksilver 8M0109441 Thermostat - 160°F Quicksilver replacement thermostat for use with 1987 and newer GM engines with standard cooling requiring the use of a 160 degree thermostat. Quicksilver's high quality parts are tested through some of the...

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Sierra 18-0488 Intake Gasket Special Order est. 10 Days For use on Mercruiser I/O engines Fits:  MCM 350 Mag, 5.0L & 5.7L/LX Gen II (1996-up)  Interchangeable with:  Mercruiser Stern Drive 27-807473A1 Volvo...

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Sierra 18-2834 Thermostat Cover Gasket Sierra replacement thermostat cover gasket for Mercruiser Stern Drives. Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. Fits: MCM/MIE Ford V-8 engines Interchangeable...

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