same day shipping clock icon
free shipping box icon
price tag icon

Mercruiser Cooling System

7439
guidebook

Parts Selection Guide

Find the parts you need

Clear
  • 1) Engine Manufacturer:
  • 2) Part Type:
  • 3) Select Model:

Prop Selection Guide

Find the right prop for your boat

Clear
  • Engine Manufacturer:
  • Engine Horsepower:
  • Engine Model:
  • Engine Year:
  • Prop Pitch:
      • Sierra 18-4226 Drain Plug Replaces 22-806608A02
        List Price: $4.49
        Starting At: $3.49

        Sierra 18-4226 Mercruiser Blue Plastic Drain Plug This Sierra 18-4226 drain plug is widely used for Mercruiser V4, V6 and V8 marine engines. Fits Mercruiser cylinder blocks and exhaust manifolds Comes complete with o-ring Interchangeable...

        Add to Cart
      • Sierra 18-3214 Impeller Kit Replaces 47-8M0100526
        List Price: $38.49
        Starting At: $26.99

        Sierra 18-3214 Impeller Repair Kit for Mercury Sierra 18-3214 Impeller Repair Kit is a rebuild kit for Mercury Marine, Honda, and Chrysler/Force engines. Sierra aftermarket engine parts are manufactured to meet or exceed all OEM requirements. For Use...

        Add to Cart
      • Sierra 18-1976-2 Mercruiser Manifold Elbow
        List Price: $194.49
        Starting At: $186.99

        Sierra 18-1976-2 Mercruiser Manifold Elbow Fits most Mercruiser V6 and V8 applications, 7 degree (4" O.D. Riser). Unlike automotive engines, all marine inboards have exhaust risers that feature a water induction elbow. Located behind the engine’s...

        Add to Cart
      • Sierra 18-3150 Water Pump Kit Replaces 46-807151A14
        List Price: $93.99
        Starting At: $89.99

        Sierra 18-3150 Mercruiser Bravo Water Pump Kit The Sierra 18-3150 Water Pump Kit is for use on all Mercruiser Bravo and TRS Sterndrives and Inboard Marine engines. Can be used to replace the 2 piece housing sea water pump. Sierra aftermarket engine...

        Add to Cart
      • Sierra 18-3320 Water Pump Kit
        List Price: $50.49
        Starting At: $35.49

        Sierra 18-3320 Water Pump Kit Sierra replacement water pump kit for Mercruiser engines. Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. For MR/Alpha l Units S/N 6854393-0D469858 Includes: Water Pump...

        Add to Cart
      • Sierra 18-1953-2 Exhaust Manifold
        List Price: $285.49
        Starting At: $219.99

        Sierra 18-1953-2 Mercruiser V8 Exhaust Manifold Sierra exhaust manifolds are designed as OEM replacements and meet or exceed manufacturer’s requirements. Sierra replacement manifolds are fully interchangeable with the OEM products they are...

        Add to Cart
      • Sierra 18-3517 Water Pump Kit Replaces 46-60367A1
        List Price: $36.99
        Starting At: $25.99

        Sierra 18-3517 Water Pump Kit (Without Base) Sierra replacement water pump kit for Mercury and Mercruiser engines. Sierra high quality aftermarket parts are manufactured to meet or exceed OEM requirements. Fits: Mercury/Mariner 65 HP (4 cylinder)...

        Add to Cart
      • Sierra 18-3217 Impeller Kit Replaces 46-96148A8
        List Price: $29.99
        Starting At: $20.99

        Sierra 18-3217 Water Pump Repair Kit for Mercruiser, Mercury For #1 Units thru S/N D494568 (Similar to #46-96148A5 without base or housing) Used on Mercruiser Stern Drives and Mercury Outboards. This kit contains all the components needed to properly...

        Add to Cart
      • Sierra 18-3017 Water Pump Impeller Replaces 47-89984T3
        List Price: $19.99
        Starting At: $13.99

        Sierra 18-3017 Water Pump Impeller for Mercury Sierra replacement water pump impeller for Mercury and Mercruiser engines. This impeller fits MCM and outboard applications. All Sierra engine parts are manufactured to meet or exceed OEM requirements...

        Add to Cart
      • Sierra 18-3599-2 Circulating Water Pump Replaces 8503991
        List Price: $128.99
        Starting At: $96.49

        Sierra 18-3599-2 Water Circulating Pump for Mercruiser, Volvo Sierra high-quality engine parts are designed to meet OEM specifications. Fits Both Standard and Counter Rotating Engines. Fits GM V-6 (s/n 1A063239 & below) & V-8 (305, 350 &...

        Add to Cart
      • Sierra 18-0897 Exhaust Manifold Elbow Gasket Replaces 27-863724
        List Price: $7.99
        Starting At: $5.99

        Sierra 18-0897 Mercruiser Exhaust Elbow Gasket Sierra engine parts are designed to meet OEM specifications. The 18-0897 Exhaust Elbow Gasket is a standard cooling, restrictor gasket. Fits 1981-1997 GM V-6 & V-8 engines with center rise outlet...

        Add to Cart
      • Sierra 18-3087 Impeller Replaces 47-59362T1
        List Price: $22.99
        Starting At: $15.99

        Sierra 18-3087 Water Pump Impeller for Mercruiser, Mercury For use on Mercruiser Bravo Sterndrives and Inboard engines with engine mounted sea water pumps (1999 & older)...

        Add to Cart
      • Water Pump Kit, Mercury - Mercruiser 47-43026Q06
        List Price: $59.42
        Starting At: $44.29

        Water Pump Repair Kit, Mercury - Mercruiser 47-43026Q06 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...

        Add to Cart
      • Impeller for 1999 & Older Mercruiser 47-59362T-1
        List Price: $37.67
        Starting At: $28.07

        Impeller for 1999 & Older Mercruiser 47-59362T-1 Fits Mercruiser engines with engine mounted sea water pumps (1999 & Older) Replaces: GLM 89740 Mallory 9-45375 OMC 0775517 Redline RL3087 Sie-18-3087  

        Add to Cart
      • Sierra 18-3647 Thermostat Kit Replaces 807252Q5
        List Price: $34.99
        Starting At: $26.49

        Mercruiser 160 Degree Thermostat Kit by Sierra Kit Includes: Sie-18-3649 Thermostat Sie-18-2844 Thermostat Cover Gasket Sie-18-2552 Thermostat Cover Gasket Sie-18-2553 Thermostat Cover Gasket Sie-18-7173 O-Ring Sie-18-2917 Thermostat Housing...

        Add to Cart
      • Sierra 18-3668 Thermostat Kit
        List Price: $19.99
        Starting At: $13.99

        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...

        Add to Cart
      • Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724
        List Price: $15.25
        Starting At: $10.14

        Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724 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...

        Add to Cart

      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.