Johnson Outboard Thermostats & Gaskets

      • Sierra 18-3672 Thermostat Kit
        List Price: $26.49
        Starting At: $15.16

        Sierra 143 Degree Thermostat Kit for Johnson, Evinrude and Mercury Outboards Kit Includes: 18-3553 (Thermostat) 18-0182 (Thermostat Gasket)   Johnson Evinrude Applications: 5 HP 1965-1968, 1986 5.5 HP 1959-1964 6HP 1965-1979, 1986 7.5 HP...

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      • Sierra 18-3673 Thermostat Kit
        List Price: $39.49
        Starting At: $27.23

        Sierra Thermostat Kit for Johnson and Evinrude V-4 Crossflow Outboard Engines Kit includes: Thermostats, Gaskets, Springs and Grommets   Applications: 80 HP Jet 1994-1995 85 HP 1978-1980 85 HP 1993-1995 88 HP 1987-1995 90 HP 1983-1995* 90 HP Jet...

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      • Sierra 18-3674 Thermostat Kit
        List Price: $32.99
        Starting At: $23.38

        Sierra 18-3674 Thermostat Kit for Johnson & Evinrude Engines For Johnson and Evinrude V-6 Crossflow engines. Use With: Thermostat 18-3543 Includes: (1) 18-1219 Grommet Gasket (V6 Crossflow) (1) 18-0182 Thermostat Gasket (1) 18-3135...

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      • Sierra 18-3544 Thermostat Replaces 0435491
        List Price: $27.49
        Starting At: $16.43

        Sierra 18-3544 Johnson & Evinrude Thermostat Sierra high-quality replacement thermostat for Johnson/Evinrude Outboards. Interchangeable with: Johnson/Evinrude Outboard 435491 437090 Mallory 9-43032 9-43036

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      • Sierra 18-3543 Thermostat Replaces 5005440
        List Price: $24.49
        Starting At: $14.65

        Sierra 18-3543 Johnson,Evinrude Outboard Engine Thermostat Sierra high-quality engine parts are designed to meet OEM specifications.  Temperature Rating: 143 Interchangeable with: Johnson/Evinrude...

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      • Sierra 18-3669 Thermostat Kit
        List Price: $33.49
        Starting At: $20.45

        Sierra 18-3669 Thermostat Kit for Johnson and Evinrude Outboards Sierra replacement engine parts are designed to meet OEM Specifications. Kit Contains: (1) 18-0929 Thermostat Gasket (1) 18-2548 Thermostat Cover Gasket (1) 18-3557...

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      • Sierra 18-3564 Poppet Relief Valve
        List Price: $4.99
        Starting At: $2.59

        Sierra 18-3564 Poppet Relief Valve Sierra high-quality replacement poppet relief valve. For Use on Johnson/Evinrude (OMC/BRP) Outboard Engines:  V-4 Crossflow Interchangeable with: GLM 46170 Johnson/Evinrude Outboard 318395  

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      • 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...

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      • Johnson/Evinrude 0436195 Thermostat Assembly
        List Price: $19.29
        Starting At: $16.40

        Johnson/Evinrude 0436195 Thermostat Assembly OEM BRP Thermostat T-Stat for Johnson and Evinrude Outboards. Fits: 1996-2006 9.9-15 HP Big Bore 1995-2005 40, 48, 50 HP 1993-2001 3 Cylinder HP 1993-2001 90 Degree V4 Interchangeable...

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      • Sierra 18-1507 Thermostat Seal
        List Price: $5.49
        Starting At: $3.05

        Sierra Thermostat Seal Special Order est. 10 Days For use on Johnson/Evinrude Outboard Engines For:  60 degree v-4 & v-6 Replaces:  335981

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      • Sierra 18-1219 Grommet Gasket
        List Price: $4.49
        Starting At: $2.61

        Sierra 18-1219 Grommet Gasket  Sierra replacement grommet gasket for use with V-6 Crossflow Johnson/Evinrude Outboard Engines. Interchangeable with: GLM 46100 Johnson/Evinrude Outboards 320880

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      • Sierra 18-3563 Poppet Relief Valve
        List Price: $5.50
        Starting At: $2.78

        Sierra 18-3563 Poppet Relief Valve Sierra high-quality replacement poppet relief valve for Johnson/Evinrude Outboards with V6 Crossflow. Interchangeable with: GLM 46180 Johnson/Evinrude Outboard 321027

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      • Sierra 18-2391 Grommet
        List Price: $5.49
        Starting At: $3.61

        Sierra 18-2391 Grommet (V4 Crossflow) Sierra replacement grommet for Johnson/Evinrude Outboards. Interchangeable with: GLM 86481 Johnson/Evinrude Outboard 321692

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      • 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

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      • Sierra 18-3560 Vernatherm
        List Price: $36.99
        Starting At: $27.99

        Sierra 18-3560 Vernatherm Sierra replacement Vernatherm for use on Johnson/Evinrude (OMC/BRP) Outboard Engines. Fits most 3 & 4 Cyl., 1985-90 models Temperature Rating: 105 Degrees Interchangeable with: Johnson/Evinrude...

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      Johnson Boat Thermostats

      The boat thermostat is an undervalued part of every craft. This small machine regulates engine temperature to ensure optimal performance. Boat engines run at max performance which generates a lot of heat. Should the engine start to overheat thermostats provide the first line of defense against an expensive repair or possible replacement. In addition, the thermostat controls emission levels so your boat stays regulation-compliant.

      Find What Your Boating Life Needs at Wholesale Marine

      Wholesale Marine carries dependable Johnson Outboard boat thermostats, as well as everything you need to ensure you are ready to go: diaphragm gaskets, rubber valves, grommets, vernatherms, and all inclusive kits can all be located using our parts finder tool. All of our replacement Johnson Outboard thermostats meet OEM specifications and are backed by a price match guarantee from Wholesale Marine.

      We want to be your number one trusted source for all boat-related items, so we take your satisfaction seriously. Our customer service representatives are real boaters ready to offer guidance with all your boating supply needs. We are here Monday through Friday, from 9:00 AM until 6:00 PM, EST at (877) 388-2628 to assist. Our Captain’s Loyalty Rewards program, free shipping on orders over $99, and same day shipping are always available to make your shopping experience the best ever.