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      Product Listing

      • Sierra 18-2565-9 Impeller Gasket (Priced Per Pkg Of 2)
        $20.49
        $15.99

        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
        $97.49
        $69.99

        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
        $49.99
        $41.99

        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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      • Mercury 8M0205186 Thermostat Assembly Kit Image
        $147.49
        $92.99

        Mercury 8M0205186 Thermostat Assembly Kit Mercury Thermostat Assembly Kit 8M0205186 is engineered to maintain proper engine operating temperatures for optimal performance and fuel efficiency. Designed for select 5.7L V10 Verado and Mercury Racing...

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      • Sierra 18-0768 Wear Plate Gasket
        $1.49
        $0.99

        Sierra 18-0768 Wear Plate Gasket - Special Order est. 10 Days Interchangeable with:   Mercury Marine 27-84024 27-84024M Yamaha Outboard 682-44315-00-00 682-44315-A0-00  

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      • Sierra 18-2919-9 Water Pump Gasket (Priced Per Pkg Of 2)
        $6.49

        Sierra 18-2919-9 Water Pump Gasket (Pkg Of 2) Sierra replacement water pump gasket for Mercury and Mercruiser engines. Package of 2 Interchangeable with: GLM 31050 Mallory 9-60031 Mercruiser Stern Drive 27-426311 Mercury...

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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.