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      Mercruiser Thermostats & Gaskets

      • Sierra 18-0342 Power Trim Hose Connector Plate Gasket
        $1.99
        $1.49

        Sierra 18-0342 Power Trim Hose Connector Plate Gasket Sierra 18-0342 Power Trim Hose Connector Plate Gasket is a replacement part for Mercruiser Stern Drives. Interchangeable with: Barr MC472747644 GLM 31470 Mercruiser Stern...

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      • Sierra 18-3652 Thermostat Kit
        $32.49
        $22.99

        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)...

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      • Sierra 18-0462 Carb Mounting Gasket
        $9.99
        $7.49

        Sierra 18-0462 Carburetor Mounting Gasket Sierra replacement carburetor mounting gasket for use with Mercruiser Stern Drive. Interchangeable with: GLM 31540 Mallory 9-61003 Mercruiser Stern Drive 27-48399

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      • Sierra 18-0487 Intake Gasket
        $105.49
        $73.99

        Sierra 18-0487 Intake Gasket Sierra 18-0487 Intake Gasket fits MCM 262 Mag & 4.3L/LX/LH/LXH (Gen+) (1996 & up) Interchangeable with: Mallory 9-61214 Mercruiser Stern Drive 27-8243261 27-824326002

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      • Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2)
        $6.99
        $5.49

        Sierra 18-0398-9 Thermostat Gasket (Priced Per Pkg Of 2) Sierra replacement thermostat gasket for Mercruiser, Volvo Penta, and OMC Stern Drives. Use with aluminum exhaust manifold. Fits: 110/120 & 140/150/160 (I/L 6 cyl.) also MCM 3.0L/LX...

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      • Sierra 18-3552 Thermostat Replaces 76270T
        $24.99
        $17.49

        Sierra 18-3552 Thermostat for Mercruiser and Crusader Engines Sierra replacement thermostat for Crusader and Mercruiser engines. Temperature Rating: 160°F For: Fresh Water Cooling Fits: 470/485 models (s/n 6218036 and below) Interchangeable...

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      • Sierra 18-0353 Carb Mounting Gasket
        $6.99
        $4.99

        Sierra 18-0353 Carb Mounting Gasket- Special Order est. 10 Days Interchangeable with: Barr MC47-27-58764 GLM 30510 Mallory 9-61005 Mercruiser Stern Drive 27-58764 Osco 58764

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      • Sierra 18-1210 End Cap To Manifold Gasket
        $0.99
        $0.92

        Sierra 18-1210 End Cap To Manifold Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM 120 & 160 Interchangeable with: Barr MC472739923 GLM 31420 Mallory 9-61409 Mercruiser Stern...

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      • Sierra 18-2553-9 Thermostat Cover Gasket (Priced Per Pkg Of 2)
        $5.49
        $4.49

        Sierra 18-2553-9 Thermostat Cover Gasket for Mercruiser Stern Drives (Pkg Of 2) Sierra replacement Mercruiser thermostat cover gasket. Fits: MCM/MIE GM V-6 & V-8 engines w/older style 2 piece thermostat housing Package of...

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      • Sierra 18-0404 Intake Gasket Kit
        $95.49
        $72.99

        Sierra 18-0404 Intake Gasket Kit Sierra replacement intake gasket kit for use on Mercruiser engines: MCM/MIE 454 Mag MPI, 502 Mag MPI, 7.4L/LX MPI & 8.2L MPI (1993 & newer). Interchangeable with: Mercruiser Stern Drive 27-805403A1

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      • Sierra 18-2564-1 Impeller Gasket
        $15.99
        $10.99

        Sierra 18-2564-2 Impeller Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For use on Chrysler/Force/US Marine, Honda Outboards, Mercruiser Stern Drives, and Mercury Marine engines. Interchangeable...

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      • Sierra 18-0403 Intake Gasket Kit
        $83.99
        $58.99

        Sierra 18-0403 Intake Gasket Kit - Special Order est. 10 Days Interchangeable with: Mallory 9-61217 Mercruiser Stern Drive 27-52571 27-61782 27-805722A1 27-812712  

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      • Sierra 18-0667 Connector Cover Gasket
        $0.99
        $0.80

        Sierra 18-0667 Connector Cover Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives. Interchangeable with: GLM 32160 Mercruiser Stern Drive 27-995061 27-99506

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      • Sierra 18-2007 Oil Seal Replaces 26-94038
        $15.99
        $10.99

        Sierra 18-2007 Oil Seal Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. O.D.: 1.500" Shaft Size: 1.000" Width: 0.312" Interchangeable with: GLM 85600 Mallory 9-76103 Mercruiser Stern...

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      • Sierra 18-3567 Rubber Valve
        $1.49

        Sierra 18-3567 Rubber Valve (V6 Crossflow) Sierra replacement rubber valve for Johnson/Evinrude V6 Crossflow. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Interchangeable with: GLM 46140 Johnson/Evinrude...

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      • Sierra 18-0672-9 Exhaust Elbow Gasket (Priced Per Pkg Of 2)
        $29.49
        $22.49

        Sierra 18-0672-9 Exhaust Elbow Gasket (Priced Per Pkg Of 2) Sierra replacement exhaust elbow gasket for Mercruiser Stern Drives. Fits: GM V-6 & V-8 with center rise outlet exhaust manifold For: Closed cooling Interchangeable...

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      Mercruiser OEM Engine Parts Finder

      Mercruiser Thermostats and Gaskets

      Thermostats regulate engine temperature for optimal performance, so it is important that you do not have a faulty one. When it comes time for replacement, we carry Mercruiser thermostat kits, Mercruiser thermostat replacements, and Mercruiser rubber valves. All our Mercruiser thermostats and gaskets are Sierra brand. Sierra aftermarket parts are manufactured to meet OEM requirements.