7440
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:

      Mercruiser Water Pumps & Impellers

      Mercruiser OEM Engine Parts Finder

      MerCruiser Impellers and Water Pumps

      Some of the most reliable water pumps and components for any type of craft are built by MerCruiser. If your boat has a MerCruiser outboard, its water pump will be one of its key parts. Here’s an important tip- once a year maintenance will keep your boat’s pump in top shape- that’s all it takes to extend its working lifetime. Water pumps and impellers do have a limited service life, however. When yours requires replacement, it is time to contact Wholesale Marine.

      Wholesale Marine carries replacement MerCruiser impellers, and water pumps 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 selection, here are the steps to take for determined DIYers and technicians alike:

      Replacing MerCruiser Water Pumps:

      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 the MerCruiser Water Pumps that you or your marine technician require 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!