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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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Mercruiser Water Pumps & Impellers

Mercruiser Thermostats & Gaskets

Mercruiser Water Circulating Pumps

Mercruiser Water Shutter & Exhaust Tubes

Mercruiser Exhaust Manifolds

Mercruiser Hoses

Mercruiser Serpentine Belts

Mercruiser V-Belts

Mercruiser Thermostat Housing

      Mercruiser Cooling System

      • Sierra 18-4349 Exhaust Manifold Gasket Set
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        Sierra 18-4349 Exhaust Manifold Gasket Set

        $35.99
        $25.49

        Sierra 18-4349 Mercruiser V8 Exhaust Manifold Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. For GM 200, 228, 230, 260, 898 (5.0 & 5.7L). Set Contains: (2) 18-0872 Exhaust Manifold Gasket (2) 18-0897...

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      • Sierra 18-2748 Exhaust Boot Replaces 32-44348001
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        Sierra 18-2748 Exhaust Boot Replaces 32-44348001

        $42.49
        $29.99

        Sierra 18-2748 Mercruiser 4" Upper Exhaust Boot Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drive engines. Upper Tube: 4" Fits MCM 120, 140 & GM V-6 & V-8 engines Use with:...

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      • Sierra 18-3317 Water Pump Kit Replaces 46-96148A8
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        Sierra 18-3317 Water Pump Kit Replaces 46-96148A8

        $68.49
        $47.99

        Mercruiser Pre-Alpha Water Pump Housing Kit by Sierra For #1/R Units without flush S/N 2763442 - 6854392 Pre-Alpha Mercruiser Drives. Models which have been retro fitted with an Alpha style ( no preload pin on top of driveshaft) must use Kit # 18-3320...

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      • Sierra 18-3668 Thermostat Kit
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        Sierra 18-3668 Thermostat Kit

        $44.99
        $31.49

        Sierra 18-3668 Thermostat Kit for Mercruiser Stern Drives For Mercruiser engines using 142 degree thermostats Fits 1983 & newer GM V-6 & V-8 engines with standard cooling Includes: (1) Thermostat Cover Gasket (18-2552) (1) Thermostat...

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      • Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724
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        Quicksilver 27-863724 Restrictor Elbow Gasket

        $14.99
        $12.49

        Mercury - Mercruiser 27-863724 Restrictor Elbow Gasket Fits Center Riser manifolds. Commonly used on all raw water cooled engines. Creates back pressure by restricting the water flow, keeping the manifold full. For: 185, 205, 229 & 262 CID V-6...

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      • Sierra 18-0549 Plug Off Cap Replaces 3852476
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        Sierra 18-0549 Plug Off Cap Replaces 3852476

        $13.49
        $10.49

        Sierra 18-0549 Plug Off Cap 1" I.D. Sierra high quality engine parts are designed to meet OEM specifications. For V8 Stern Drives and Inboards 1977 - present. Interchangeable with: GLM 22290 Johnson/Evinrude...

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      • Sierra 18-3147 Water Pump Kit Replaces 817275k05
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        Sierra 18-3147 Water Pump Kit Replaces 817275k05

        $158.99
        $111.49

        Sierra 18-3147 Mercruiser Alpha Gen II Water Pump Kit Sierra high-quality engine parts are designed to meet OEM specifications. For use with Gen II Lower S/N D469859 and Up. Kit Contains: Carrier Seal 18-2354 Impeller 18-3056 Impeller Plate...

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      • Sierra 18-3016-1 Impeller Kit Replaces 47-862232A2
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        Sierra 18-3016-1 Impeller Kit Replaces 47-862232A2

        $34.49
        $23.99

        Sierra 18-3016-1 Impeller Kit For Use On Late-Model Bravos & High Performances. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Includes gasket Use with 18-3160-1 Sea Water Pump Fits: MCM 4.5L MPI; 2000...

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      • Sierra 18-3551 Marine Thermostat
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        Sierra 18-3551 Thermostat Replaces 8M0089715

        $18.49
        $12.99

        Sierra 18-3551 142 Degree Thermostat for Mercruiser, Crusader,PCM When needing to replace your thermostat, we recommend Sierra high-quality engine parts as they are designed to meet OEM specifications at an economical price. The Sierra thermostats are...

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      • Water Pump Impeller Mercury - Mercruiser 47-43026T-2
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        Quicksilver 47-43026T-2 Water Pump Impeller

        $35.99
        $29.99

        Mercury - Mercruiser 47-43026T-2 Water Pump Impeller  Genuine OEM Mercury - Mercruiser part. Fits: 30/40/45/50/60 hp Fourstroke Bigfoot 60 hp (3cyl) BigFoot 75 - 125 hp (all 3 & 4 cylinder models s/n A996142 and above) 75/90/115 hp...

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      • Sierra 18-3650 Thermostat Kit
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        Sierra 18-3650 Thermostat Kit

        $35.99
        $24.99

        Sierra 18-3650 Mercruiser 140 Degree Thermostat Kit  For Mercruiser Sterndrive engines using 140 degree thermostat. Fits 1998 & older MCM GM In-Line 4 & 6 cylinder engines. Kit Includes: (1) 18-2831 Thermostat Gasket (1) 18-3550...

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      • Water Pump Repair Kit, Mercury - Mercruiser 47-8M0100527
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        Mercury - Mercruiser 47-8M0100527 Water Pump Repair Kit

        $65.99
        $54.99

        Mercury - Mercruiser 47-8M0100527 Water Pump Repair Kit Fits: 40/45/50/60 Fourstroke BigFoot 60 (3cyl) Bigfoot 75 - 125 (all 3 & 4 cylinder 0A996142 & above) 75, 90, 115 Fourstroke V-200/225/250 (3.0L) Mercruiser Alpha One Gen II...

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      Mercruiser OEM Engine Parts Finder

      Mercruiser Cooling System

      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.

      We are Keeping 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 boats 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 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. We have everything you need to run preventative maintenance on your vessel and to upgrade your older parts. Water pumps, impellers, thermostats, gaskets, circulation pumps, shutter & 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. Peruse our selection today and give us a call with your questions at (877) 388-2628.