same day shipping clock icon
free shipping box icon
price tag icon

Mercruiser Thermostats & Gaskets

      • Sierra 18-3668 Thermostat Kit
        List Price: $19.99
        Starting At: $14.14

        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...

        Add to Cart
      • Sierra 18-3647 Thermostat Kit Replaces 807252Q5
        List Price: $33.99
        Starting At: $23.99

        Mercruiser 160 Degree Thermostat Kit by Sierra 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 Thermostat Housing Gasket ...

        Add to Cart
      • Sierra 18-3551  Marine Thermostat
        List Price: $14.99
        Starting At: $10.92

        Sierra 18-3551 142 Degree Thermostat for Mercruiser, Crusader,PCM Sierra high-quality engine parts are designed to meet OEM specifications. For Use On Ford 302/351 CID Engines, and used on all V-8 Chrysler engines with Rochester carburetors 1986-present...

        Add to Cart
      • Sierra 18-3650 Thermostat Kit
        List Price: $23.49
        Starting At: $14.45

        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...

        Add to Cart
      • Sierra 18-3648 Thermostat Kit
        List Price: $26.49
        Starting At: $15.95

        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)...

        Add to Cart
      • Sierra 18-3569 Thermostat Kit Replaces 803061T1
        List Price: $20.99
        Starting At: $14.20

        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...

        Add to Cart
      • Sierra 18-3649 Thermostat Replaces 8M0091470
        List Price: $26.99
        Starting At: $16.45

        160 Degree Thermostat for Mercruiser & Crusader Use With: Thermostat Gasket 18-2917 Replaces: Mercury - 807252T2 Mercruiser - 8M0091470, 807252T2, 8072522, 8052732, 8M0109441 Crusader - 97895 Mallory - 9-43002 GLM - 13100 Pro Marine - 64252-2...

        Add to Cart
      • Sierra 18-3646 Thermostat Kit Replaces 807252Q3
        List Price: $22.99
        Starting At: $15.89

        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...

        Add to Cart
      • Sierra 18-3651 Thermostat Kit
        List Price: $20.99
        Starting At: $14.54

        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...

        Add to Cart
      • Sierra 18-3667 Thermostat Kit
        List Price: $23.99
        Starting At: $15.58

        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)

        Add to Cart
      • Sierra 18-3550 Thermostat Replaces 59078
        List Price: $19.99
        Starting At: $16.35

        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...

        Add to Cart
      • Sierra 18-3557 Thermostat Replaces 47594
        List Price: $25.99
        Starting At: $19.45

        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...

        Add to Cart
      • Sierra 18-3555 Thermostat Replaces 99155T2
        List Price: $18.99
        Starting At: $13.33

        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...

        Add to Cart
      • Sierra 18-3652 Thermostat Kit
        List Price: $26.99
        Starting At: $17.45

        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 Gasket (1) 18-2843 Thermostat Gasket (1)...

        Add to Cart
      • Sierra 18-3567 Rubber Valve
        List Price: $5.51
        Starting At: $2.62

        Sierra 18-3567 Rubber Valve Sierra replacement rubber valve for Johnson/Evinrude V6 Crossflow. Interchangeable with: GLM 46140 Johnson/Evinrude Outboard 321221

        Add to Cart