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      • Quicksilver 8M0150724 Pulley Sea Water Pump Image
        $127.79
        $106.49

        Quicksilver 8M0150724 Pulley Sea Water Pump Water pump pulley 8M0150724 is for use on 4.3L, 5.0L, 5.7L, 6.2 & 8.1L MerCruiser sterndrive and inboard engines made by General Motors and having a brass seawater pump. The pulley outside diameter is 5.7...

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      • Quicksilver 47-85089Q-4 Water Pump Repair Kit Image
        $50.99
        $42.49

        Quicksilver 47-85089Q-4 Water Pump Repair Kit This kit fits 15-25hp 2-stroke Mercury and Mariner outboards. See your owner’s manual for replacement schedule and installation instructions. Application: Fits various 15 thru 25 hp 2 cycle...

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      • Mercury - Mercruiser 47-89984T-4 Impeller
        $50.99
        $42.49

        Mercury - Mercruiser 47-89984T-4 Impeller Fits MCM & Outboard applications Uses a brass insert. An alternate glass insert impeller (47-89984T 3) is available for increased corrosion protection in salt water applications...

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      • Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit
        $222.59
        $185.49

        Mercury OEM Mercruiser Alpha One Gen II Water Pump Repair Kit 817275K05 This genuine OEM MerCruiser water pump rebuild kit is for use with Alpha One Gen II Sterndrives. By repairing and maintaining your water pump you can ensure the flow rate your...

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      • Sierra 18-3318 Water Pump Kit Replaces 47-59362Q08
        $89.49
        $62.49

        Sierra 18-3318 Water Pump Kit Special Order est. 10 Days For Use on Mercruiser I/O Engines Fits:  Plastic 1 and 2 piece sea water pump body Contains: Impeller 18-3087 Wear Plate 18-3350 Wear Plate 18-3351 Water Pump Body...

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      • EMP 46-13159 MerCruiser Water Pump Kit
        $95.99
        $79.99

        EMP 46-13159 MerCruiser Water Pump Kit This EMP replacement water pump kit is for use with MerCruiser engines. Water Pump Application Information: For MercCruiser V8 200-575HP engines, Alpha One, Alpha Gen II, Bravo, SSM, & Dry Six drive water...

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      • Quicksilver 27-858524 Water Pump Gasket Image
        $3.49
        $2.99

        Quicksilver 27-858524 Water Pump Gasket Quicksilver Water pump gasket 858524 is for use on MerCruiser 1, R, MR and Alpha One sterndrives (serial No. 2495186-0D469858), Mercury and Mariner 65hp (4-cylinder) through V6 outboards with short-vane...

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      • Sierra 18-3116 Water Pump Housing Replaces 46-96148T1
        $48.49
        $33.99

        Sierra 18-3116 Water Pump Housing for Mercury, Mercruiser Sierra high-quality replacement engine parts are designed to meet OEM specifications.  For use with 18-3109 Water Tube Guide and 18-3110 Water Pump Housing Brushing Interchangeable...

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      • EMP 47-01814 Mercury Mariner Impeller
        $22.07
        $18.39

        EMP 47-01814 Mercury Mariner Impeller This impeller is intended for use on Mercury Mariner, Honda, and Force engines and meets all OEM requirements. Specification: ID: 22.4mm OD: 89mm W: 32.5mm 6 Blades Uses Key 28-32833 Impeller...

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      • EMP 46-46501 Mercury MerCruiser Water Pump Kit
        $70.07
        $58.39

        EMP 46-46501 Mercury MerCruiser Water Pump Kit 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 various hardware...

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      • EMP 46-00090 Mercury MerCruiser Water Pump Kit with Housing
        $47.99
        $39.99

        EMP 46-00090 Mercury MerCruiser Water Pump Kit with Housing This EMP replacement water pump kit is for use with Mercury and MerCruiser engines. Water Pump Application Information: For MerCruiser MC1 & R/MR/Alpha One engines For Mercury Mariner V6...

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      • Quicksilver 817275Q05 Water Pump Rebuild Kit label
        $203.99
        $169.99

        Quicksilver 817275Q05 Water Pump Rebuild Kit  Genuine OEM Mercury-Mercruiser part. Quicksilver water pump rebuild kit for Mercruiser stern drives. Fits your MerCruiser Alpha One Gen II or Vazer drive unit. See your owner’s manual for...

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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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      Mercruiser OEM Engine Parts Finder

      MerCruiser Water Pump Kits

      Wholesale Marine carries replacement MerCruiser water pumps and impeller kits for most every generation of MerCruiser from Sierra, and Mercury-MerCruiser. While most boaters prefer to have a reliable marine technician inspect and replace their boat’s water pump with a new part from our MerCruiser water pump kit selection, here are the steps to take for determined DIYers and technicians alike:

      Replacing Your MerCruiser Water Pump:

      1. To access the water pump housing, drop the gearcase. This requires removing the
        mounting bolts.
      2. Locate the bolt under the trim tab. Mark its position to make its reassembly easier.
      3. Using a fitting socket on the four mounting bolts, remove the water pump assembly.
      4. If your MerCruiser impeller’s vanes are no longer straight, the component needs to be replaced. (Tip: Fresh sealant on the gaskets will reduce leaks.)
      5. Push the new impeller into the housing liner twisting slightly clockwise.
      6. Place the impeller key flat on the driveshaft. Next, lower the housing and impeller assembly into place. Be careful not to over-tighten the mounting screws.

      Water pump impellers are one of the more vulnerable pump assembly parts. MerCruiser impellers should be inspected once a year, or every 100 hours, and replaced as needed. Impellers are a series of rubber vanes that are molded around a hub that rotates. Friction, corrosion, water, sand, disuse, and heat can all abrade and degrade the rubber. Also, when the vanes are bent, this is an indication that replacement is required.

      Keep your engine running cool with help from Wholesale Marine. We have all the MerCruiser water pumps and MerCruiser impeller kits that you or your technician will need for replacement. Come to Wholesale Marine for every part that your MerCruiser outboard requires, including circulating pumps, thermostats, and temperature senders. If you have a question, our customer service reps will be glad to assist you.

      Be sure to ask them about our Captain’s Club Rewards Program for additional discounts the next time you shop at Wholesale Marine.

      Give us a call at (877) 388-2628, or try our user-friendly Online Parts Finder for help locating the correct parts for your outboard.

      We’re here Monday through Friday from 9:00 AM until 6:00 PM EST and look forward to serving your boating needs!

      FAQs

      How do I know if my MerCruiser water pump or impeller needs to be replaced?

      Common signs of a failing water pump or impeller include overheating, reduced water flow from the cooling system, engine alarms, and visible wear or bending of the impeller vanes during inspection.

      Can I replace my MerCruiser water pump or impeller myself?

      Yes, replacing a MerCruiser water pump or impeller is a DIY-friendly task if you have the right tools and follow the proper steps. However, if you're unsure, it's best to have a certified marine technician handle the replacement.

      What causes a MerCruiser impeller to wear out prematurely?

      Impellers wear out due to friction, heat, corrosion, and exposure to sand or debris. Running the engine without water can also quickly destroy the impeller, as it relies on water for lubrication.