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Brand Part Number Superseded By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Mercury 8, 9.9, 13.5, 15, 18, 20, 25 8-25 2-Stroke 1984-2005 99157T2 Superseded 99157A2, 85098A2
Mariner 8, 9.9, 13.5, 15, 18, 20, 25 8-25 2-Stroke 1984-2005 99157T2 Superseded 99157A2, 85098A2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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A
Amazon Reviewer 💖
Fort Morgan, US
★★★★★ 5
Surprisingly strong cooling effect and really comfortable
Size: Queen (90" * 90"), Color: Luxury Grey, Size: Queen (90" * 90"), Color: Luxury Grey
This comforter honestly impressed me more than I expected. The cooling effect is very noticeable right away. Like actually noticeable, not just one of those things brands say. When you first touch it, it feels cool to the skin and that feeling sticks around instead of fading instantly. I’ve been using it at night and it definitely helps with overheating. I tend to get cery hot when I sleep, also I’m pregnant right now so that makes it even worse, and this has made a difference. It feels lightweight but still cozy enough that it doesn’t feel like you’re just using a thin sheet. The fabric is really soft and smooth, also it lays nicely on the bed without feeling stiff or bulky. It gives that clean, almost silky feel without being slippery. One thing to keep in mind is it’s not a super thick comforter, but i will say there is some heft to it. Like if i wrap myself around in it, it has some weight to it. Overall, I’m really happy with it. It actually does what it claims with the cooling, and it’s comfortable enough for everyday use. Great option if you’re a hot sleeper or just want something lighter and refreshing at night.
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Reviewed in the United States on April 22, 2026
M
mnvikings
Natrona Heights, US
★★★★★ 5
I love this comforter! It is so silky soft, feels so nice to sleep under.
Size: King(103“*90”), Color: Luxury Grey, Size: King(103“*90”), Color: Luxury Grey
I absolutely love this comforter! It is super lightweight and has a very silky soft shell on both sides. It feels so good to sleep under! Ever since I have been using it, I haven't been waking up in sweat covered sheets. It constantly has a cool feel to it 24/7. It is large enough that it fits my king size bed pretty good. It doesn't hang far over the edges, but it fits. It is dual sided, so you can have a light gray look on one side and a dark gray look on the other side, depending on what fits your decor better. I definitely recommend getting if you are on the lookout for a cooling comforter, especially because of the silky soft feel.
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Reviewed in the United States on May 11, 2026
J
J
Lexington, US
★★★★★ 5
It really cools - Extremely soft - Not too heavy
Size: Queen (90" * 90"), Color: Luxury Grey, Size: Queen (90" * 90"), Color: Luxury Grey
This comforter arrived packaged very well from the manufacturer. It arrived sealed in plastic inside a box. The color and appearance of the comforter received looks like what was shown in the listing. This comforter is extremely soft. It feels very cool to the touch. It has a great cooling effect. It is also not too heavy. A lot of cooling bedding products like this feel heavy. While this does have some weight it is not too much. It is easy to move around. The comforter is easy to refresh and cool off again after extended use. I just uncovered myself, lifted and moved the comforter around a little, then covered back up. This made it feel cooler again. I am very happy with this comforter so far. I like the color and design. I really like feeling cool when falling asleep. This will be great when the temperatures start going up. I will update this review later if anything changes after washing a few more times and longer use. I think this will be a good comforter for most hot sleepers who like to cover up all year.
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Reviewed in the United States on April 18, 2026
L
Lynelle
Draper, US
★★★★★ 5
Feels seriously amazing!
Size: Twin(90“ * 67”), Color: Luxury Grey
This is my second cooling comforter from this brand and this one is just as amazing as the first. It’s silky soft and makes a significant temperature difference. It’s like magic; you don’t need to do anything special to cool it before bed. If you do want extra coolness, you can place it in front of your AC or turn on your fan for a little bit before bed and It absorbs the extra coolness but either way it lasts all night. I use it with the cooling pillow, and the hot summer nights are no match. It’s easy to wash, really silky, smooth, and actually cool against the skin. It also somehow has a weighted blanket-like feel without being heavy. I standby this blanket so much that this is my second one, highly recommend!
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Reviewed in the United States on May 5, 2026
A
Amazon Customer
Lake Worth, US
★★★★★ 5
Super Soft, Lightweight, and Surprisingly Cozy
This ended up being so much better than I expected. The first thing I noticed is how incredibly soft it is - it has that plush, velvety feel that makes you want to keep reaching for it all day. It’s lightweight but still warm, which I really like. It gives you that cozy, wrapped-up feeling without being heavy or overwhelming, so it works well for everyday use on the couch or even for sleeping. For reference, I’m 5’2” and it’s big enough to comfortably use as a full snuggle blanket. It also looks really nice draped over furniture. The texture adds a little dimension, and the clean, simple color gives it a polished look that doesn’t feel cheap. One thing to note is that it arrives compressed, but it fluffs up nicely once opened and feels much fuller after a little time. The only thing to keep in mind is that lighter colors will naturally show dirt more easily, so that’s something to be aware of with regular use. Overall, this has easily become my go-to daily throw - soft, comfortable, and much nicer than I expected for the price.
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Reviewed in the United States on April 15, 2026

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