SKU: 10762363530

Water Pump Repair Kit – Fits Mercury 175-300HP & 450R V6/V8 4-Stroke Outboards (Replaces 8M0205803, 8M0142980)

Sale price$20.70 Regular price$23.00
Save 10%

Pay in installments of $5.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 16 - Sep 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Water Pump Repair Kit – Fits Mercury 175-300HP & 450R V6/V8 4-Stroke Outboards (Replaces 8M0205803, 8M0142980)Water Pump Repair Kit Fits Mercury 175 300HP & 450R V6 V8 4 Stroke Outboards This water pump repair kit is designed for Mercury Marine 175 300HP 3. 4L V6 and 4. 6L V8 4 stroke outboards (2019 and newer, serial number 2B529482 and above), including 450R models. It serves as a direct replacement for multiple OEM part numbers, ensuring a precise fit and reliable performance for your engine's cooling system. Installation Method: Direct replacement for a

Water Pump Repair Kit – Fits Mercury 175-300HP & 450R V6/V8 4-Stroke Outboards

This water pump repair kit is designed for Mercury Marine 175-300HP 3.4L V6 and 4.6L V8 4-stroke outboards (2019 and newer, serial number 2B529482 and above), including 450R models.

It serves as a direct replacement for multiple OEM part numbers, ensuring a precise fit and reliable performance for your engine's cooling system.

  • Installation Method: Direct replacement for a straightforward installation.
  • Engine Compatibility: Specifically fits Mercury V6/V8 4-stroke outboards with serial number 2B529482 and above.
  • Complete Kit: Includes the impeller, face plate, gaskets, seals, and installation tool for a comprehensive service.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury 8M0205803
Mercury 8M0142980
Mercury 47-8M0205803
Mercury 98-8M0142980

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury 3.4L V6 175 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 3.4L V6 200 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 3.4L V6 225 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 4.6L V8 200 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 4.6L V8 225 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 4.6L V8 250 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury 4.6L V8 300 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above
Mercury Racing 450R 4-Stroke 2019 and newer 8M0205803 Serial no. 2B529482 and above

Technical Specifications

Specification Value
Product Type Water Pump Repair Kit
Installation Direct replacement
Other Technical Attributes For Mercury V6/V8 4-stroke outboards with serial number 2B529482 and above

Package Contents

  • 1 x Water Pump Gasket (8M0205803)
  • 1 x Face Plate (8M0205803)
  • 1 x Face Plate Gasket (8M0205803)
  • 1 x Impeller Key (8M0205803)
  • 1 x Impeller (8M0205803)
  • 1 x Face Seal (8M0205803)
  • 1 x Drain Plug Seal (8M0205803)
  • 1 x Water Pump Gasket (8M0205803)
  • 1 x O-Ring (8M0205803)
  • 1 x Actuator Seal (8M0205803)
  • 1 x Face Seal Tool (8M0205803)

Installation Guide

  1. Disconnect the negative battery cable to prevent accidental starting. Place the engine in neutral.
  2. Remove the lower unit (gearcase) from the outboard by unbolting it from the midsection. This may require an assistant.
  3. Place the lower unit on a workbench and remove the bolts securing the water pump housing.
  4. Slide the old housing, impeller, gaskets, and wear plate off the driveshaft. Note the orientation of the old impeller blades.
  5. Clean all mating surfaces of any old gasket material or debris.
  6. Install the new components in reverse order: gaskets, wear plate, impeller key, and impeller. Lightly grease the new impeller and slide it on while turning the driveshaft clockwise.
  7. Install the new face seal, tool, plate gaskets, and housing. Ensure all seals are properly seated.
  8. Torque the housing bolts to the manufacturer's recommended specification.
  9. Reinstall the lower unit onto the outboard, making sure the driveshaft and water tube align correctly.
  10. Reconnect the battery. Start the engine using a water source (flushing muffs or in water) and immediately check for a steady stream from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific Mercury outboard?
A: This kit is designed for Mercury 3.4L V6 and 4.6L V8 4-stroke outboards from 2019 and newer, specifically with a serial number of 2B529482 and above. Please check your engine's serial number plate to confirm compatibility before ordering.

Q: What are the signs my water pump is failing and needs replacement?
A: Common signs of a failing water pump include a weak or no water stream from the "tell-tale" outlet, engine overheating alarms, or steam from the exhaust. Reduced engine performance at high RPMs can also indicate a cooling issue.

Q: How often should I replace my outboard's water pump kit?
A: As a crucial part of preventative maintenance, it is recommended to inspect the impeller annually and replace the entire water pump kit every two to three years or every 200-300 hours of use. This interval may be shorter if you frequently operate in sandy, silty, or saltwater conditions.

Q: Does this kit include the plastic water pump housing?
A: No, this is a repair kit containing the primary wear components like the impeller, gaskets, seals, and face plate. The upper housing is not included and should be inspected for warping or damage before installing this kit.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 10762363530

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 16 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
D
Verified Purchase
Dupont Els
Natrona Heights, US
★★★★★ 5
Love it
Very happy with this product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
B
Verified Purchase
Becca
Birmingham, US
★★★★★ 4
Nice spray, don’t get in eyes
Don’t get in eyes, overall I like it though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
C
Cass
Houston, US
★★★★★ 5
Scent and application does not irritate my very sensitive lungs and skin
I am having excellent luck with this sunblock! I have sensitive skin and am extremely sensitive to some aerosol and scented products. This has not been an issue with me in any way. We do apply this outside for more ventilation. I have not used this on small children. This has primarily been tried by adults in my household. It’s super easy to apply, not oily, and so far is providing sun protection. I have not used this and then entered water. Our use has been for just everyday running around. It has not irritated anyone’s skin and no one has been burned by the sun- so gonna say it’s a win. This is very likely my new brand. I will update this review over the summer with how it holds up at the beach and pool. It’s doing a great job for basic outside recreation and play
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
S
sonofjohn
Pawtucket, US
★★★★★ 5
Nice refreshing sunscreen
Great spray sunscreen. Don't even notice any difference between this organic sunscreen and regular sunscreen. It sprays nice and evenly and provides good protection for a reasonable time. I've used this during a number of workouts out in the sun, sweating, for a few hours at a time. It sprays pretty lightly on, and stays on. Once it sprays on, while it feels light, you do feel it (like a little sticky on your skin), same as any other sunscreen really though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
C
Crazyplantlady
Lake Worth, US
★★★★★ 5
Great summer scent, easy to apply, non greasy.
We LOVE spray on sunscreen. So much easier to apply, especially to yourself in the harder to reach areas. My kids like it better too, doesn't take as long so they can get to the fun stuff. This smells great, I love summer scents. It doesn't leave you feeling greasy or like you've just tarred and feathered yourself in cream and then sand. It's an SPF 50, so extra strong and does well at protecting. I do wish it was a little cheaper, so I watch for it go on sale and stock up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026

recommand products