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Description
Water Pump Kit – Fits Mercury/Mariner 6–15 HP (Replaces 46-42089A5)Water Pump Kit Fits Mercury Mariner 615 HP (Replaces 46 42089A5) This water pump repair kit is designed for Mercury Mariner 2 Stroke 615 HP (1986Up) and 4 Stroke 815 HP (19952004) outboard motors with standard gearcases (non BigFoot models). It provides a reliable solution for maintaining your engine's cooling system. This kit serves as a direct replacement for Mercury Mariner part numbers 46 42089A5, 46 42089A4, and 46 42089A3. It is also compatible
Water Pump Kit – Fits Mercury/Mariner 6–15 HP (Replaces 46-42089A5)
This water pump repair kit is designed for Mercury/Mariner 2-Stroke 6–15 HP (1986–Up) and 4-Stroke 8–15 HP (1995–2004) outboard motors with standard gearcases (non-BigFoot models). It provides a reliable solution for maintaining your engine's cooling system.
This kit serves as a direct replacement for Mercury/Mariner part numbers 46-42089A5, 46-42089A4, and 46-42089A3. It is also compatible with select 1998 Force/Sears 9.9–15 HP models.
- Engineered for direct OEM replacement and fit.
- Features a durable metal alloy housing and a neoprene rubber impeller for optimal performance.
- Includes all necessary gaskets, seals, and hardware for a complete overhaul.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury/Mariner | 46-42089A5 |
| Mercury/Mariner | 46-42089A4 |
| Mercury/Mariner | 46-42089A3 |
| Force/Sears | Compatible with 9.9 & 15 HP (1998) |
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.
Confirm your engine model/year in the table below.
Mercury/Mariner 2-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Standard | 6 | 2-Stroke | 1986–Up | 46-42089A5 | Serial Number 0A197112 and Up (USA) |
| Mercury/Mariner | Standard | 6 | 2-Stroke | 1986–93 | 46-42089A5 | Serial Number 9461526 and Up (BEL) |
| Mercury/Mariner | Standard | 8 | 2-Stroke | 1986–Up | 46-42089A5 | Serial Number 0A197112 and Up (USA) |
| Mercury/Mariner | Standard | 8 | 2-Stroke | 1986–93 | 46-42089A5 | Serial Number 9461526 and Up (BEL) |
| Mercury/Mariner | Standard | 9.9 | 2-Stroke | 1986–98 | 46-42089A5 | Serial Number 0A197112 and Up (USA) |
| Mercury/Mariner | Standard | 9.9 | 2-Stroke | 1986–93 | 46-42089A5 | Serial Number 9461526 and Up (BEL) |
| Mercury/Mariner | Standard | 15 | 2-Stroke | 1988–98 | 46-42089A5 | Serial Number 0B292414 and Up (USA) |
| Mercury/Mariner | Standard | 15 | 2-Stroke | 1988–93 | 46-42089A5 | Serial Number 9542620 and Up (BEL) |
| Mercury/Mariner | XR10, Sea Pro, 10 Mag, Marathon | 10 | 2-Stroke | 1990–98 | 46-42089A5 | Serial Number 0D038000 and Up (USA) |
| Mercury/Mariner | XR10, Sea Pro, 10 Mag, Marathon | 10 | 2-Stroke | 1990–98 | 46-42089A5 | Serial Number 9596000 and Up (BEL) |
| Mercury/Mariner | 15 Sea Pro, Marathon | 15 | 2-Stroke | 1994–98 | 46-42089A5 | Serial Number 0G044365 and Up (USA) |
| Mercury/Mariner | 15 Sea Pro, Marathon | 15 | 2-Stroke | 1997–98 | 46-42089A5 | Serial Number 9927000 and Up (BEL) |
Mercury/Mariner 4-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Standard (232cc) | 8 | 4-Stroke | 1995–2004 | 46-42089A5 | Serial Number 0G760300–0T178499 |
| Mercury/Mariner | Standard (232cc) | 8 | 4-Stroke | - | 46-42089A5 | Serial Number 0H017100–0H017349 (BEL) |
| Mercury/Mariner | Standard (232cc) | 9.9 | 4-Stroke | 1995–98 | 46-42089A5 | Serial Number 0H000058–0H016909 (USA) |
| Mercury/Mariner | Standard (323cc, Non-BigFoot) | 9.9 | 4-Stroke | 1999–2004 | 46-42089A5 | Serial Number 0G760300–0T979999 (USA) |
| Mercury/Mariner | Standard (323cc, Non-BigFoot) | 9.9 | 4-Stroke | - | 46-42089A5 | Serial Number 0P075166–0P325499 (BEL) |
| Mercury/Mariner | Standard (323cc, Non-BigFoot) | 15 | 4-Stroke | 1998–2004 | 46-42089A5 | Serial Number 0G590000–1B727495 (USA) |
| Mercury/Mariner | Standard (323cc) | 15 | 4-Stroke | 1998 | 46-42089A5 | Serial Number 0G590000 and Up (USA) |
| Mercury/Mariner | Standard (323cc) | 15 | 4-Stroke | - | 46-42089A5 | Serial Number 9973100 and Up (BEL) |
Force/Sears Models
| Brand | Model | Rated HP | Stroke | Years | Notes |
|---|---|---|---|---|---|
| Force/Sears | Standard | 9.9 | 2-Stroke | 1998 | Compatible with 1998 models |
| Force/Sears | Standard | 15 | 2-Stroke | 1998 | Compatible with 1998 models |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Repair Kit with Housing |
| Installation | Direct replacement for OEM applications |
| Housing Material | Metal alloy |
| Impeller Material | Neoprene rubber |
| Weight | 298g (10.5 oz) |
Package Contents
- 1 x Impeller (47-42038-2)
- 1 x Wear Plate (42200)
- 2 x Gasket (27-19202/27-19204-3)
- 2 x Gasket (12-19183)
- 2 x Gasket (19643)
- 1 x Pump Base (46-420T5)
- 1 x Pump Housing (46-42089A2)
- 1 x Retainer (42375)
- 2 x Oil Seal (26-41365-1)
- 2 x Seal (26-33613/26-42133)
- 1 x Screw (10-48408)
- 2 x Washer (12-16448)
- 1 x Quad Ring (25-822236)
Installation Guide
- Disconnect Power: Disconnect the battery and spark plug wires to prevent accidental starting.
- Drain Gearcase: Drain the gearcase oil to avoid spills.
- Remove Lower Unit: Unbolt and carefully lower the gearcase assembly from the outboard.
- Access the Pump: Locate and remove the bolts securing the water pump housing.
- Disassemble Old Pump: Remove the old housing, impeller, wear plate, and gaskets. Note the orientation of the old parts.
- Clean Surfaces: Thoroughly clean the mating surfaces on the gearcase and driveshaft.
- Install New Components: Install the new gaskets, wear plate, impeller (rotate shaft clockwise), and seals from the kit.
- Reassemble Housing: Apply a light coat of marine grease to the inside of the new housing and install it over the impeller. Secure with bolts.
- Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align. Torque bolts to spec.
- Refill and Test: Refill the gearcase with fresh oil. Reconnect the battery and start the engine in water to verify a strong water stream from the tell-tale outlet.
Troubleshooting & FAQ
Q: How do I confirm this kit fits my specific Mercury engine?
A: The most reliable method is to match your engine's serial number to the ranges listed in the compatibility tables. The serial number is typically found on a tag on the transom bracket. Use our linked serial number guide for help locating it.
Q: What are the signs that my water pump needs to be replaced?
A: Common indicators include the engine running hotter than normal, an intermittent or weak water stream from the "tell-tale" outlet, and visible cracking or damage to the old impeller upon inspection.
Q: How often should the water pump impeller be replaced?
A: For preventative maintenance, it is highly recommended to replace your impeller every 1-2 years or every 100-200 hours of operation, depending on usage and water conditions (saltwater vs. freshwater).
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
4.1 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 4
The basic set-up is relatively easy which was a big plus for me......
First let me start off by saying that I am not an audiophile. So, this review will not get into the weeds of the more complex settings this receiver is capable of. For example, the Dirac room measuring option. No way was I attempting to mess with that. Especially, after reading that some reviewers who actually have experience with Dirac found it could be confusing/difficult to set up. Besides I come from a previous Onkyo the TX-SR607 which had the AccuEQ Room Calibration similar to this receiver, so I used that instead with no issues. As far as hooking up the speakers it's pretty straight forward. If you have banana plugs, use them, seriously. I originally planned on using banana plugs but in order to save time I decided against that. But I wish I had taken the extra time to go with bananas because trying to thread the speaker wire into the speaker terminals is tedious, there not much room between the terminals and even me with my skinny fingers struggled a bit. Wish Onkyo designed their terminals side by side, but I think only Denon does that. Anyway, after all the speakers were connected (I'm currently using a 5.1.2 setup) and I connected my tv, Blu-ray player, CD player, etc., etc., I ran the AccuEQ Room Calibration, and I was good to go. I did change the some of the settings like speaker volume that AccuEQ has set but nothing major. I have noticed that I need to turn the volume up much higher on this Onkyo than on my previous one. What I mean by that is that on my previous Onkyo I would set the volume indicator at around 30-35 tops for movies. With this one it's more like 40-45, maybe how the volume is measured is different on this one. The sound is excellent for movies and music I have no complaints there. I have only tried a few of features so far like Airplay but will dig deeper into the manual (I downloaded from the internet) as time goes by. I will say as far as build quality is concerned it's not bad, but IMO my old Onkyo, a 2009 model, had the look and feel of a more expensive receiver. But it's what's inside that matters most so hopefully this one last as long as my previous Onkyo.
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Reviewed in the United States on February 22, 2024
★★★★★ 1
Sound unexpectantly blasted for no reason. It malfunctioned!
I spent hours between installation and set up! I had to return it. I turned on NET (network) to play Sirius Xm and the volume was low but after a few minutes the sound turned all the way up to maximum completely on its own? This happened at least two more times. I contacted ONKYO and was told it is clearly defective and that their is no solution to correct the problem, and that I should return it immediately! I purchased the newer model and am pleased with its performance! It’s unfortunate because the first one that had the issue with the sound really played nice, but having sound change its volume so suddenly to its full capacity was not what I expected, nor felt comfortable enough to keep as I said I was told to return it, which I did! My advice here would be to purchase the newer model, which seems to be much more stable in its performance, and the quality is excellent.
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Reviewed in the United States on November 29, 2025
★★★★★ 5
Absolutely Love This Receiver
The Onkyo TX‑NR7100 has completely transformed my home theater. The sound quality is rich, detailed, and powerful, and the 9.2‑channel setup gives movies and music a level of immersion I didn’t realize I was missing. Dirac Live right out of the box is a huge win — the room correction made an immediate, noticeable improvement.
Setup was smooth, the interface is clean, and everything from streaming to switching inputs feels fast and reliable. It also plays perfectly with the rest of my system, and the THX certification really shows in how cinematic everything sounds.
I absolutely love this receiver. It’s one of those upgrades that makes you wonder why you didn’t do it sooner.
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Incredible 9.2 Surround receiver at an unbeatable price.
I may return at a future date to give a more complete review, but others that are much more knowledgeable about audio equipment than I have already done so.
For me, the Onkyo (Onkyo TX-NR7100 9.2-Channel 8K/4K Network A/V Receiver) replaced a much older (2001) TX DS787 5.1 100 W Surround receiver that listed new for around $1050. I probably didn't pay quite that much but certainly something near $900. It was great for its time, perhaps even advanced with THX, Dolby, and other listening modes.
But it didn't have: HDMI inputs or outputs, any BlueTooth capability, no hard wired or WiFi connectivity or basically any operating or connection modes that most all modern receivers have. This turned into a big problem with modern LED/LCD/OLED TVs, Alexa and other now common devices.
I bought my new Onkyo TX-NR7100 from Amazon for $625. Other retailers (e.g.Best Buy) advertise it for up to $1200, so Amazon's price is outstanding. Set up was far more complicated (for me) than any previous receiver that I ever owned, mostly because there were a very large number of back panel input and output jacks, to and from the TV, as well as speaker outputs for 9.2 surround.
Suffice it to say that once everything was connected properly (I made a few mistakes along the way), I was completely thrilled. The On Screen Display, completely accessible either from the front panel or the remote was far superior to anything I had ever seen before. Literally every operating parameter is accessible to the user. And I used most of them.
It is also completely WiFi ready so my 150 Gbit home Wifi network lets it connect wirelessly and stream music error free. BlueTooth is also another way to connect almost any device to it for audio and audio/video playback if you connect the digital connections to and from a modern TV. It also speaks and listens to Alexa, although I must confess that I haven't played around with that much yet.
This is already much longer than I had intended, so let it suffice to say that the Onkyo TX-NR7100 is an absolutely incredible receiver for an incredible price. I'd give it 8 stars if I could.
JM TEPPER
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Reviewed in the United States on November 7, 2024
★★★★★ 5
Sounds great.
Just received my Onkyo TX-NR 7100, watched a few YouTube videos before it arrived, so set up was easy. Ran accuEQ, I am getting new front speakers so I’ll wait to run Dirac. After accuEQ, I still had to make a few adjustments, to the speaker levels and especially the sub. It set my subwoofer way too low. As of right now having no problems with Bluetooth. I’ve only listened to music so far, can’t wait to watch a movie. For now I have a 5.1.2. System, getting new fronts, the Klipsch r51-m’s will go to the rear surround and Klipsch r41-m’s will be my height speakers in a 5.1.4 system. So far loving this avr.
Update 2: Just calibrated with Dirac for the 6th time. They tell you if you sit in a recliner, reclined measure with it reclined. Well I measured with the chair in its upright position. It makes a huge difference I hear the surrounds much better. Btw I listen to all channel stereo, I know audiophiles say it sucks, however I listened to 2 channel stereo for 20 years, when there was nothing else. I didn’t buy a 9 channel avr to listen to 2 channel stereo. Like Randy the cheap audio man says “ audiophiles aren’t always right. If it sounds good to you, that’s all that matters.” So try calibrating in the upright position, or if you sit on a stationary chair or couch, try positioning the mic slightly forward of your listening position. It makes a huge difference. Hope this helps, enjoy.
Update:
Ok bought Klipsch rp-600m speakers for the front with 52c center. 51m surrounds, 41m rear heights. Polk owm3 front heights. Why Polk? Lighter easy to hang and as height speakers they are only there for atmos. Ran Dirac live, the application does what it would take several hours to make it sound like it does, if I even could get it to sound so good. Apple TV 4K with my Hisense U8K. The google tv interface is ok, but Apple TV is faster and easier. The Onkyo 7100 is a gem, runs pretty warm but I have it out in the open. If you are going to put in a cabinet I suggest a fan. Very happy with the whole system.
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Reviewed in the United States on January 11, 2025