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guidebook

Parts Selection Guide

Find the parts you need

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Prop Selection Guide

Find the right prop for your boat

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  • Engine Horsepower:
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Mercruiser Water Pumps & Impellers

Mercruiser Water Pumps & Impellers
Mercruiser Thermostats & Gaskets

Mercruiser Thermostats & Gaskets
Mercruiser Water Circulating Pumps

Mercruiser Water Circulating Pumps
Mercruiser Water Shutter & Exhaust Tubes

Mercruiser Water Shutter & Exhaust Tubes
Mercruiser Exhaust Manifolds

Mercruiser Exhaust Manifolds
Mercruiser Hoses

Mercruiser Hoses
Mercruiser Serpentine Belts

Mercruiser Serpentine Belts
Mercruiser V-Belts

Mercruiser V-Belts
Mercruiser Thermostat Housing

Mercruiser Thermostat Housing

      Mercruiser Cooling System

      • Sierra 18-70954 Molded Hose
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        Sierra 18-70954 Molded Hose

        $49.99
        $34.99

        Sierra 18-70954 Mercruiser Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For use for oil cooler to oil cooler. Fits 5.0L, 5.7L/LX, 350 Mag & MX 6.2L MPI Interchangeable...

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      • EMP 46-46502 Mercury MerCruiser Water Pump Kit
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        EMP 46-46502 Mercury MerCruiser Water Pump Kit

        $120.95
        $100.79

        EMP 46-46502 Mercury MerCruiser Water Pump Kit with Housing This EMP replacement water pump kit is for use with Mercury and MerCruiser engines. This boat water pump kit comes with a rubber coated wear plate, stainless steel housing, impeller, and...

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      • Sierra 18-1993 Thermostat Housing
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        Sierra 18-1993 Thermostat Housing

        $93.99
        $65.99

        Sierra 18-1993 Thermostat Housing Sierra replacement thermostat housing for Mercruiser Stern Drives. Fits MCM/MIE 198/898, 228, 250, 260 & 280 Interchangeable with: GLM 13530 Mercruiser Stern...

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      • Sierra 18-70949 Molded Hose
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        Sierra 18-70949 Molded Hose

        $8.49
        $5.99

        Sierra 18-70949 Molded Hose Sierra replacement molded hose for Mercruiser Stern Drives. Fits 454 Mag MPI (Gen VI) (1996-01), 7.4LX MPI Bravo(Gen VI) (1996-97), 502 Mag MPI (Gen VI) (1996-01) For cooler to thermostat housing. Interchangeable...

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      • Sierra 18-71218 Molded Hose
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        Sierra 18-71218 Molded Hose

        $23.99
        $16.99

        12 1/2" Molded Hose - Special Order est. 10 Days Replaces: MALLORY 9-44072 MERCURY 32-48132 OMC 0509268 12 1/2" Overall Length 1" ID

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      • Sierra 18-0667 Connector Cover Gasket
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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 18-4257 Pipe Plug
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        Sierra 18-4257 Pipe Plug

        $2.99
        $1.99

        Sierra 18-4257 Pipe Plug Sierra high-quality replacement pipe plug for use.  Material: Black Steel Thread Size: 1/4" Note: Pipe sealant with Teflon is recommended for use on plug threads. Use with: 56507 Loctite Pipe Sealant (PST 6ml w/...

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      • Sierra 18-70946 Molded Hose
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        Sierra 18-70946 Molded Hose

        $18.49
        $12.99

        Sierra 18-70946 Molded Hose Sierra high-quality engine parts are designed to meet OEM specifications. For Thermostat housing to starboard manifold with 2 piece exhaust manifold Fits 4.3L/LH Interchangeable...

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      • EMP 22-05154 Volvo/MerCruiser Drain Plug
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        EMP 22-05154 Volvo/MerCruiser Drain Plug

        $10.55
        $8.79

        EMP 22-05154 Volvo/MerCruiser Drain Plug This drain plug is intended for use with Volvo, MerCruiser, & Indmar gearcases and meets all OEM requirements. Drain Plug Application: For Volvo all years, all model gearcases For MerCruiser 1975-2000...

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      • Sierra 18-15345 V-Belt
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        Sierra 18-15345 V-Belt

        $27.99
        $19.49

        Sea Water Pump V Belt - Effective length 34.5". Top width 29 / 64" Replaces: Mercury 57-74271Q, 57-68038, 57-74271T Sierra 18-15340 OMC 0509306 Details: High strength synthetic cords resist shockload failure. Their low stretch...

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      • Sierra 18-15470 V-Belt
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        Sierra 18-15470 V-Belt

        $34.99
        $24.49

        OMC, Mercruiser V-BELT - Effective Length 47", Top Width 29/64" Replaces: Mercury 57-78200Q 1, 57-78200A 1 OMC 0509309 Redline RL15470 Details: High strength synthetic cords resist shockload failure. Their low stretch properties...

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      • Sierra 18-1974-1 Manifold Elbow Replaces 98502A2
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        Sierra 18-1974-1 Manifold Elbow Replaces 98502A2

        $415.99
        $291.49

        Sierra 18-1974-1 Mercruiser Manifold Elbow Fits Mercruiser V6 and V8 Applications. 0 degree angle (3" O.D. Riser). Comes with 18-0897 Gasket and Brass Plugs. Use With: Exhaust Elbow Gasket: 18-0672,18-2849-1, and 18-0897 Manifold:...

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      • Sierra 18-2007 Oil Seal Replaces 26-94038
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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 18-2566-9 Impeller Gasket (Priced Per Pkg Of 2)
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        Sierra 18-2566-9 Impeller Gasket (Priced Per Pkg Of 2)

        $7.99
        $5.99

        Sierra 18-2566-9 Impeller Gasket (Priced Per Pkg Of 2) Sierra high-quality engine parts are designed to meet OEM specifications. For use on Chrysler/Force/US Marine engines, Mercruiser Stern Drives, and Mercury Marine engines. Use For Engine Models:...

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      • Sierra 18-2919 Water Pump Gasket
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        Sierra 18-2919 Water Pump Gasket

        $0.96
        $0.86

        Sierra 18-2919 Water Pump Gasket Interchangeable with: GLM 31050 Mallory 9-60031 Mercruiser Stern Drive 27-426311 Mercury Marine 27-42631 27-426311

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      Mercruiser OEM Engine Parts Finder

      MerCruiser Cooling Systems

      The cooling system of your MerCruiser engine keeps it from overheating and ensures that it’s operating at its best. It’s important to keep the entire cooling system updated and maintained, since its health is at the forefront of your engine’s overall performance. If you need parts for your MerCruiser cooling system, Wholesale Marine has all you need.

      Wholesale Marine Keeps it Cool!

      A boat’s engine, such as your MerCruiser sterndrive or inboard engine, is a delicate piece of machinery full of moving parts that each need special attention. In times past, a boat's engine was simply cooled by pulling raw water straight out of the source the vessel was floating in, running that through the engine, and out the other end. This left an engine with several issues, such as saltwater corrosion, large debris, and lack of efficiency. Further still, this sort of cooling system once upon a time only ran at 145 to 150 degrees, as regulated by a thermostat, to avoid saltwater crystallization. This is an issue due to a number of reasons, one of which was the amount of build-up that would occur at such cool temperatures. Now we have engines full of checks and balances to get our MerCruiser sterndrive or inboard at max power without overheating. And Wholesale Marine has everything you need to run preventative maintenance on your vessel and to upgrade your older parts. Water pumps, impellers, thermostats, gaskets, circulation pumps, shutter and exhaust tubes, exhaust manifolds, hoses, belts, and more are all here to fit your MerCruiser cooling system. Ready to get started? Check out our easy-to-use Parts Selection tool to quickly get you exactly what you are searching for.

      For keeping that sterndrive, inboard, or tow sport engine cool come rain or shine, you can depend on Wholesale Marine to provide high quality parts from the top brands in the industry. Our same day shipping, free shipping on orders over $99, and price match guarantees give you quality parts in a timely and economical manner. Review our selection today and give us a call with your questions at (877) 388-2628. Be sure to ask about our Captain’s Club Rewards Program for additional discounts on everything you need to keep your boat in top shape for your next adventure!