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      Mercury Outboard Thermostats & Gaskets

      • 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 18-3633 Mercury Thermostat
        $78.99
        $63.99

        Sierra 18-3633 Mercury Thermostat - Replaces 8M0090819 Sierra replacement thermostat for Mercury Outboards. Fits: 75-115HP, 115 Pro XS (2B094996 & UP) Interchangeable with: Mercury Marine 8M0090819

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      • Sierra 18-2559 Impeller Gasket
        $3.99
        $2.99

        Sierra 18-2559 Impeller Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For Mercury 6/8/9.9/15 Interchangeable with: Chrysler/Force/US Marine 27-19202 GLM 31230 Mercury...

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      • Sierra 18-2565 Impeller Gasket
        $1.49
        $0.92

        Sierra 18-2565 Impeller Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For use with Chrysler/Force/US Marine engines, Honda Outboards, and Mercury Marine engines. Interchangeable with: Chrysler/Force/US...

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      • Sierra 18-0622 Lower Wear Plate Gasket
        $4.99
        $3.49

        Sierra 18-0622 Lower Wear Plate Gasket Sierra replacement lower wear plate gasket for Chrysler/Force/US Marine and Mercury Marine engines. Sierra engine parts are manufactured to meet or exceed OEM requirements. Interchangeable...

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      • Mercury - Mercruiser 14586A-4 Thermostat Kt-120
        $92.49
        $80.49

        Mercury - Mercruiser 14586A-4 Thermostat Kt-120 Includes 120 degree thermostat, gaskets, and poppet value Fits various Mercury/Mariner 50/55/60 hp. 2 cycle outboards. See application chart for specific engine models.

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      • Sierra 18-0970 Fuel Pump Base Gasket
        $0.58
        $0.44

        Sierra 18-0970 Fuel Pump Base Gasket Sierra replacement fuel pump base gasket for use on Chrysler/Force/US Marine, Mercury Marine, and Mercury Sport Jet engines. Interchangeable with: Chrysler/Force/US...

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      • Sierra 18-43052 Thermostat Kit
        $49.99
        $34.99

        Sierra 18-43052 Thermostat Kit Sierra replacement thermostat kit for Mercury Outboards. Temperature Rating: 120°F Fits: Various Mercury/Mariner 6-25 hp 2 cycle outboards Interchangeable with: Mallory 9-43052 Mercury...

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      • Mercury - Mercruiser 14586A7 Thermo/Poppet Kit
        $55.99
        $48.99

        Mercury - Mercruiser 14586A7 Thermo/Poppet Kit Genuine OEM Mercury-Mercruiser part. Includes 130 degree thermostat, gaskets, and poppet value Fits Mercury/Mariner 30/40 hp. (2 cyl.) 2 cycle outboards (USA 0G044027 and Newer, BEL 9855139 and...

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      • Mercury-Mercruiser 8M0139434 Thermostat 125°
        $34.19
        $28.49

        Mercury-Mercruiser 8M0139434 Thermostat 125° Genuine OEM Mercury-Mercruiser part. Application: 15HP EFI Four Stroke 0R833820 and Above 20HP EFI Four Stroke 0R833820 and Above   Special Order Item

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      • EMP 75-00456 Mercury / BRP Thermostat Kit
        $23.03
        $19.19

        EMP 75-00456 Mercury / BRP Thermostat Kit This Thermostat Kit is intended for use on Mercury and BRP outboard engines and meets all OEM requirements. Thermostat Kit Application: For Mercury Mariner 1975-1979 V6 135-200 HP Outboards For...

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      • Mercury - Mercruiser 14586A-6 Thermostat Kit
        $58.49
        $50.99

        Mercury - Mercruiser 14586A-6 Thermostat Kit Includes 120 degree thermostat, gaskets, and poppet value Fits various Mercury/Mariner 50/55/60 hp. 2 cycle outboards. See application chart for specific engine models.

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      • Sierra 18-2565-9 Impeller Gasket (Priced Per Pkg Of 2)
        $17.99
        $13.99

        Sierra 18-2565-9 Impeller Gasket (Pkg Of 2) Sierra replacement impeller gasket for Mercury and Honda Outboards. Package of 2 Interchangeable with: GLM 30320 Honda Outboard 19242-ZW1-003 Mallory 9-60022 Mercury...

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      • Sierra 18-3635 Mercury Thermostat
        $124.99
        $87.99

        Sierra 18-3635 Mercury Thermostat - Replaces Mercury 892864T06 Sierra replacement thermostat for Mercury Marine engines. Fits: Mercury 75-115HP (1B366823-2B094995), 150 EFI (1B905505 & Up) Interchangeable with: Mercury...

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      • Sierra 18-3638 Mercury Thermostat
        $47.99
        $38.99

        Sierra 18-3638 Mercury Thermostat - Replaces 804540 Sierra replacement thermostat for Mercury Marine Outboards. Fits: Mercury 2.5-3.5HP (0R131842 & Up), 4-6HP (0R411838 & Up) Interchangeable with: Mercury Marine 804540

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      • Sierra 18-3642 Mercury Thermostat Kit
        $69.99
        $56.99

        Sierra 18-3642 Mercury Thermostat Kit - Replaces 825212A1 Sierra replacement thermostat kit for Mercury Marine Outboards. Includes 18-0835 Thermostat Cover Gasket Interchangeable with: Mercury Marine 825212001 825212A1 855676A1

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      • Mercury - Mercruiser 27-81266M Thermostat Gasket
        $7.99
        $3.99

        Mercury - Mercruiser 27-81266M Thermostat Gasket Genuine OEM Mercury - Mercruiser part. Replacement thermostat gasket for Mercury Outboards. Application: 60 (2 Cyl.) - s/n E-675-00101 thru E-675-001170 60 (2 Cyl.) - s/n EL-675-30101 thru...

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      Mercury OEM Engine Parts Finder

      Mercury Outboard Thermostats and Gaskets

      When it comes to your Mercury Outboard, thermostats are an important part for controlling the temperature of your engine. As the temperature rises, the thermostat opens and allows cooling water to flow through the outboard. Keep your outboard from overheating with our selection of Mercury Outboard thermostat kits, thermostats, and gaskets. We carry the Sierra aftermarket parts, all of which meet OEM specifications.