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Description
Water Pump Service Kit – Fits Mercury/Mariner 75-220 HP Outboards & MerCruiser I/R/MR/Alpha (Replaces 96148A8)Water Pump Service Kit Fits Mercury Mariner 75 220 HP Outboards & MerCruiser I R MR Alpha (Replaces 96148A8) This water pump service kit is designed for Mercury Mariner 65 220 HP 2 Stroke outboards with short vane impellers. It also fits MerCruiser I, R, MR, and Alpha sterndrives within the serial number range of 2491586 to 0D469858. This is a direct aftermarket replacement for Mercury part numbers 46 96148A8 and 96148A8, and Sierra part number 18
Water Pump Service Kit – Fits Mercury/Mariner 75-220 HP Outboards & MerCruiser I/R/MR/Alpha (Replaces 96148A8)
This water pump service kit is designed for Mercury/Mariner 65-220 HP 2-Stroke outboards with short-vane impellers. It also fits MerCruiser I, R, MR, and Alpha sterndrives within the serial number range of 2491586 to 0D469858.
This is a direct aftermarket replacement for Mercury part numbers 46-96148A8 and 96148A8, and Sierra part number 18-3320.
- Includes all necessary components for a complete upper water pump housing repair.
- Engineered as a direct OEM-equivalent replacement for straightforward installation.
- Features a durable plastic housing designed to meet or exceed original specifications.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 46-96148A8 |
| Quicksilver | 96148A8 |
| Sierra | 18-3320 |
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.
Mercury/Mariner Outboards
| Brand | Model | Rated HP | Stroke | Notes |
|---|---|---|---|---|
| Mercury/Mariner | 4-cylinder | 65-75 | 2-Stroke | |
| Mercury/Mariner | V6 | 75-220 | 2-Stroke | Models with short-vane impellers |
MerCruiser Sterndrives
| Brand | Model | Notes |
|---|---|---|
| MerCruiser | I Drive | Serial No. 2491586-0D469858 |
| MerCruiser | R Drive | Serial No. 2491586-0D469858 |
| MerCruiser | MR Drive | Serial No. 2491586-0D469858 |
| MerCruiser | Alpha Drive | Serial No. 2491586-0D469858 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Service Kit |
| Installation | Direct OEM replacement |
| Housing Material | Plastic |
| Housing Color | Black |
| Weight | 0.60 lb (0.27 kg) |
| Other Technical Attributes | Complete water pump repair kit for upper housing assembly |
Package Contents
- 1 x Plastic Pump Housing Assembly
- 1 x Water Impeller
- 1 x Face Plate
- 1 x Gasket Set
- 1 x Drive Key/Pin
- 1 x Water Tube Guide Sleeve
- 1 x "O" Ring Set
- 1 x Gearlube Fill & Vent Screw Seals
- 1 x Face Seal
- 1 x Seal Carrier
- 1 x Water Tube Coupling
Installation Guide
Professional installation is recommended. The general steps are outlined below:
- Disconnect the Battery: Ensure the engine is off and disconnect the battery terminals for safety.
- Remove Lower Unit: Unbolt and remove the sterndrive or outboard lower unit (gearcase) from the engine.
- Access the Pump: Locate and remove the bolts securing the water pump housing. Slide the old housing assembly off the driveshaft.
- Inspect & Clean: Remove the old impeller, key, gaskets, and wear plate. Clean all mating surfaces thoroughly, removing any old gasket material or corrosion.
- Install New Components: Place the new gaskets and wear plate. Install the new impeller drive key onto the shaft and slide the new impeller on, turning the shaft clockwise to bed the vanes correctly.
- Seat New Housing: Apply a light coat of marine grease to the inside of the new housing and install it over the impeller. Reinstall the housing bolts and tighten them to the manufacturer's specified torque.
- Reassemble & Test: Reinstall the lower unit, ensuring the water tube aligns correctly with the pump outlet. Reconnect the battery, supply water to the engine using flushing muffs, and run it briefly to confirm proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
- Q: How do I confirm this kit fits my specific engine?
- A: This kit fits MerCruiser I, R, MR, and Alpha sterndrives with serial numbers from 2491586 to 0D469858. It also fits Mercury/Mariner 65-220 HP 2-stroke outboards that use a short-vane impeller. Always verify using your engine's serial number and check against the part numbers listed.
- Q: What are the signs of a failing water pump?
- A: Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and in some cases, a steam-filled exhaust. A damaged impeller is the most common cause of failure.
- Q: How often should I replace the water pump impeller or service the kit?
- A: As a general rule, the impeller should be inspected annually and replaced every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you operate in sandy, silty, or saltwater environments. Replacing the full kit is recommended for complete preventative maintenance.
- 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:
- 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
4.4 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Adorable and Well‑Made Outfit for Special Events
Color: Light Blue, Size: 10, Color: Light Blue, Size: 10
Got this suit set for my son and absolutely love it. It comes with everything he needs to look sharp, and I really appreciate that it includes both a tie and a bow tie so we can switch up the style depending on the occasion. The quality is impressive for the price — the fabric feels light and comfortable, and the whole outfit has a polished look without being stiff or uncomfortable.
The fit was spot on, and the adjustable waistband is a huge help for getting it just right. My son looked great in it, and it’s definitely something he can wear for more than one event. The little details on the jacket and pants give it a classic, dressed‑up feel that works for weddings, holidays, or any special moment.
Overall, it’s a stylish, practical set that makes getting him ready so much easier. Really happy with this purchase.
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Reviewed in the United States on May 1, 2026
★★★★★ 4
Boys linen fabric suit
Color: Light Green, Size: 16
Boys suit set in a lighter green color. This suit is made with good proportions and seems to fit well. The sizing seems slightly big so maybe size down one size. The fabric does wrinkle easily so be aware that sitting and folding the suit may cause wrinkling. Otherwise it is a very nice suit for a formal occasion. It comes in many good colors.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Nice elegant suit for any occasion.
Color: Light Blue, Size: 12, Color: Light Blue, Size: 12
The suit set is very nice, the fabric material is durable and soft. Overall stitching is tight with nice surging of the hems and great construction on the shoulders. Buttons and button wholes are well done. I'm going to iron in the creases on the front of the pants because they weren't folded properly for shipping. The material does hold on to wrinkles so don't be afraid of your iron to get a super sharp look.
The color is a soft baby blue that stands out in a crowd of black suits. With the option of an elastic tie or clip on bowtie this is everything you need to make him look presentable for a variety of occasions.
My only complaint about this suit kit is the dress shirt is stiff and thin. I found some loose threads that I don't trust to not get played with. I'll probably trade it out for something with a little more cotton.
As far as cost goes mid range, but definitely worth the cost. I might consider something with a vest if it's a super formal event, but I'm very happy with how this suit comes together.
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Modern luxury with summer fabric that performs above its price!
Color: Beige, Size: 14, Color: Beige, Size: 14
Wow! My son wore it for Easter Sunday and this suit fits the bill! The linen material is spot on--not too heavy and not too light especially since the weather is warming up now. The jacket is quality made--the design is modern executive, the stitches are strong no flaws to note. The pants are tad bit longer but that's okay, build quality is also great. The white shirt is decent and matches well with the rest of the set. The bow tie and tie itself is a great complimentary to the set, though optional to wear. The whole set just has that quality you would really look for in the price range you would want to pay. Overall, best value for for the, wear right outside the bag, maybe a light ironing otherwise it's perfect! I highly recommend it, no complaints here very happy with this suit!
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Reviewed in the United States on April 5, 2026
★★★★★ 4
Heavy linen character, but a beautifully tailored suit!
Color: Beige, Size: 4, Color: Beige, Size: 4
This is a really nice linen suit! The jacket is beautifully made and well-tailored, with a fun speckled texture that has lots of pretty color variation (we ordered the beige). When I placed it side by side with a similar linen suit from another brand, the difference in the linen texture was really noticeable — this had a much stronger linen character that stands out!
It has three useful pockets on the outside of the jacket, which is great for little hands. The only downside is that one of the inside pockets is just for show (faux), which was a bit surprising and somewhat disappointing for my little guy.
The pants have pockets too, but they aren’t very deep — perfect for small treasures, but not much more. The pants are made from a lighter, thinner single-layer linen compared to the fully lined, double-layer jacket, which makes sense for comfort and easy movement.
The pants didn’t come with a front crease ironed in, so you’ll want to press one yourself. The linen did pick up some creases from being folded in the package, but it doesn’t seem quite as wrinkly as some other linen fabrics I’ve tried. Still, like most linen clothes, especially for boys, the pants will need occasional ironing to keep them looking neat and crisp, especially after a day of play and general wear. The structured, lined jacket stays looking smoother and more put-together with less effort.
It also came with a bow tie, a neck tie, and a tuxedo-style white shirt as extras. The ties aren’t great quality — they’d work fine for quick photos but probably won’t hold up to much actual wear. The formal white shirt feels a bit funny paired with the casual linen suit, but I don’t mind at all. We already have white shirts that we prefer, so we’ll use those instead. For us, the extras are really just bonus items we won’t plan on using.
Overall, it’s a handsome little suit that’s perfect for special occasions like weddings, family photos, or holiday events. My kid looked adorable in it! The stronger linen texture on the jacket gives it a premium feel that I really like. Just be ready for a bit of extra care with the pants to keep everything sharp.
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Reviewed in the United States on April 8, 2026
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