SKU: 48087240717

Water Pump Impeller Kit – Fits Mercury/Mariner/Force 8-25 HP Outboard Engines

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Description

Water Pump Impeller Kit – Fits Mercury/Mariner/Force 8-25 HP Outboard EnginesWater Pump Impeller Kit Fits Mercury Mariner Force 8 25 HP Outboard Engines (Replaces 99157T2, 46 99157T2) This water pump impeller kit provides a complete solution for servicing and rebuilding the lower unit water pump on a wide range of Mercury, Mariner, and Force outboard engines. It is designed for 8 25 HP 2 Stroke models from 1984 2005, ensuring reliable cooling system performance. This kit serves as a direct replacement for Mercury OEM part

Water Pump Impeller Kit – Fits Mercury/Mariner/Force 8-25 HP Outboard Engines (Replaces 99157T2, 46-99157T2)

This water pump impeller kit provides a complete solution for servicing and rebuilding the lower unit water pump on a wide range of Mercury, Mariner, and Force outboard engines. It is designed for 8-25 HP 2-Stroke models from 1984-2005, ensuring reliable cooling system performance.

This kit serves as a direct replacement for Mercury OEM part numbers 99157T2, 85098A2, and 99157A2. It is also cross-compatible with Sierra 18-3214 and Recmar REC46-99157T2.

  • Includes a neoprene impeller, wear plate, gasket, and complete pump housing.
  • Installs in the lower unit of the outboard.
  • Designed for use with gasoline engines.

Part Number Cross-Reference

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

Brand Part Number Superseded By
Mercury 85098A2 99157T2
Mercury 99157A2 99157T2
Mercury 99157T2
Sierra 18-3214
Recmar REC46-99157T2

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Mercury 8, 9.9, 13.5, 15, 18, 20, 25 8-25 2-Stroke 1984-2005 99157T2 Superseded 99157A2, 85098A2
Mariner 8, 9.9, 13.5, 15, 18, 20, 25 8-25 2-Stroke 1984-2005 99157T2 Superseded 99157A2, 85098A2
Force 25 25 2-Stroke 1995-1998 99157T2 Models H025201/H025211 series

Technical Specifications

Specification Value
Product Type Water Pump Impeller Kit with Housing
Installation Lower Unit
Fuel Type Gasoline
Warranty 1 Year (Marine-Parts eBay seller)
Other Technical Attributes Includes neoprene impeller, wear plate, gasket, and pump housing

Package Contents

  • 1 x Water Pump Kit with Housing (Replaces 99157T2/46-99157T2)
  • 1 x Neoprene Impeller (Replaces 47-85089-3/47-85089-10)
  • 1 x Wear Plate (Replaces 85083)
  • 1 x Gasket (Replaces 27-993261)
  • 1 x Pump Housing (Replaces 46-99157A02)

Installation Guide

  1. Disconnect Power: Disconnect the spark plug wires and the negative battery terminal for safety.
  2. Drain Gear Lube: Place a drain pan under the lower unit and remove the drain/fill screws to empty the gear lube.
  3. Remove Lower Unit: Remove the bolts securing the lower unit to the midsection. Carefully separate the assembly.
  4. Access Pump: Unbolt and remove the old water pump housing to expose the impeller and wear plate.
  5. Clean Surfaces: Thoroughly clean the driveshaft and all mating surfaces, removing any old gasket material or sealant.
  6. Install New Components: Place the new gasket and wear plate onto the lower unit. Slide the new impeller onto the driveshaft, ensuring the keyway is aligned.
  7. Install Housing: Lubricate the inside of the new pump housing and install it over the impeller, turning the driveshaft clockwise to help seat the vanes.
  8. Secure and Reassemble: Fasten the new pump housing. Reinstall the lower unit, making sure the driveshaft, shift shaft, and water tube align correctly.
  9. Final Checks: Refill the lower unit with marine gear lube. Reconnect the battery and spark plug wires.
  10. Test Operation: Using a water source (like flushing muffs), start the engine and verify a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?

Check your engine's model, HP, and year against the compatibility table. This kit fits 8-25 HP Mercury, Mariner, and Force 2-stroke outboards from 1984-2005. Verifying your engine's part number against the cross-reference list (99157T2, 85098A2, etc.) is the best way to ensure a match.

How often should I replace the water pump impeller?

As a general maintenance guideline, inspect the impeller annually and replace it every 1-2 years or 100-200 hours of operation, whichever comes first. If you frequently operate in sandy, silty, or saltwater, more frequent inspections and replacements are recommended.

What are the symptoms of a failing impeller?

Common signs of a worn or damaged impeller include a weak or intermittent water stream from the "tell-tale" cooling outlet, engine overheating alarms, or a reduction in engine performance. Upon inspection, a bad impeller may have cracked, brittle, or deformed vanes.

OEM vs. Aftermarket?

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.

How fast do you ship and how much does it cost?

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.

What is your warranty and return policy?

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: 48087240717

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★★★★★ 3
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I read this thru KU. I LOVED the synopsis. And then I began reading... and it was a DNF at 68% after picking it up and putting it down several times because I really loved the main female character. *****SPOILERS***** Pros: The world is unique, intriguing and fun. The primary female character is bad-a** but not a b*tech or a mary sue. The primary female has depth. I really want to know what happens to her even tho it's been weeks and I don't remember her name. The villains to the point I read are pretty good -- an ever present threat of mysterious and possibly many culprits. Cons: Way, way too many points of view. I stopped counting at 7. It's the prime reason why I don't care about most of the characters or remember their names even when I like them. There's just too many points of view so almost none of the characters have enough book space for the author to properly develop them. This literally killed the book for me. Actually it killed my desire to read. For weeks. The main male is more villain than hero. He agreed to marry the main female then locks her up & eschews her for her sister, all while bad mouthing her as unfit to rule when he never spent any time with her getting to know her. He is actually unfit to rule as he is blind to the woes of his own kingdom and starts off a peace mission to secure a ceasefire through marriage by murdering an inn full of people in her country for no real reason. Plus, he constantly makes promises he does not keep. And it's gross of him to pine for the sister behind the main female's back. ***** As much as I really wanted to see what happened to the main female character, it wasn't enough for me to keep trying to slog thru this book. There was a lot of potential here that just fell short. Hence, 3 stars.
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MaryBeth K
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This book is one that just builds and builds and then surprises you to no end. You may think you know the villains and then you are jolted in another direction. Princess Reyna is a real gem, strong of character, a fierce fighter, and loyal to her family and kingdom. Just when you think she and Lorcan, well you know, the plot is flipped. Can't wait to see where this goes in book two.
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Kindle Customer Maureen
New York, US
★★★★★ 4
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This was a slow moving book. Lots of character pov chapters, lots of superfluous descriptions and endless courtly appearances stalled this book to start. Once you get into the heart of the story, it takes off. Before you know it the book is done. My favorite character is Reyna. She is so strong. She is true to herself. She gets into a lot of trouble with her headstrong ways but it's entertaining. I have high hopes for Lorcan. He is honorable to a fault. Thane had turned out to be better than I thought but i still don't like him. Eislin is useless. Great plot twists at the end. I'm looking forward too book 2.
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Phoenix, US
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