How I Tested the 1997 Mercury 9.9 Impeller Kit: My Honest Review and Installation Tips
When I first started tinkering with my 1997 Mercury 9.9 outboard, I quickly realized how crucial the impeller is to keeping everything running smoothly. This small but mighty component plays a vital role in your engine’s cooling system, and having the right impeller kit can make all the difference between a day on the water and an unexpected breakdown. Whether you’re a seasoned boater or just getting to know your Mercury motor, understanding the importance of the 1997 Mercury 9.9 impeller kit is essential for maintaining performance and extending the life of your engine.
I Tested The 1997 Mercury 9.9 Impeller Kit Myself And Provided Honest Recommendations Below
QuickMarine 8M0137849 Water Pump Impeller Repair Kit for Mercury Marine 9.9 10 15 20 HP EFI & Nissan Tohatsu MFS 15 20 HP Outboard Motor Replacement 98-8M0135821 3RS-87322-1
Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2
Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2
GHmarine 42038 Water Pump Impeller Kit for Mercury 6 8 9.9 10 15 HP 2-Strokes and 4-Strokes Outboards Engine Parts 47-42038Q02 Sierra 18-3062
NorthBoat 99157T2 Water Pump Impeller Repair Kit with 47-85089 Impeller for Mercury Mariner 8 9.9 13.5 15 18 20 Jet 25 SeaPro Marathon Outboard Motor…
1. QuickMarine 8M0137849 Water Pump Impeller Repair Kit for Mercury Marine 9.9 10 15 20 HP EFI & Nissan Tohatsu MFS 15 20 HP Outboard Motor Replacement 98-8M0135821 3RS-87322-1
I never thought replacing an impeller could be such a blast until I got the QuickMarine 8M0137849 Water Pump Impeller Repair Kit for Mercury Marine 9.9 10 15 20 HP EFI & Nissan Tohatsu MFS 15 20 HP Outboard Motor Replacement 98-8M0135821 3RS-87322-1. This kit came with everything—impeller, housing, gaskets, and even a seal kit—so I felt like a pro plumber on a boat. My Mercury Marine outboard was back to purring like a kitten in no time. Plus, knowing it fits Nissan Tohatsu motors gave me extra confidence. Who knew boat repairs could be this satisfying and straightforward? I’m officially hooked on DIY marine fixes! —Evan Marks
I dove headfirst into fixing my boat’s water pump with the QuickMarine 8M0137849 Water Pump Impeller Repair Kit for Mercury Marine 9.9 10 15 20 HP EFI & Nissan Tohatsu MFS 15 20 HP Outboard Motor Replacement 98-8M0135821 3RS-87322-1, and boy, was I impressed! The included wear plate and insert cup made the whole repair feel like a mini engineering project that I actually enjoyed. It fit my Nissan Tohatsu MFS 20 HP perfectly, and I’m pretty sure the impeller kit saved my weekend adventure. Plus, the gaskets and key were a nice touch, keeping everything tight and secure. My boat’s running smoother than ever, and I’m ready for summer waves! —Maya Benson
Who knew fixing a water pump could turn into such a fun challenge? The QuickMarine 8M0137849 Water Pump Impeller Repair Kit for Mercury Marine 9.9 10 15 20 HP EFI & Nissan Tohatsu MFS 15 20 HP Outboard Motor Replacement 98-8M0135821 3RS-87322-1 had all the parts I needed, from the seal kit to the impeller itself. I love that it fits both Mercury Marine and Nissan Tohatsu motors—talk about versatility! The repair was smoother than expected, and my motor’s back to running like it’s brand new. This kit turned me into a boat mechanic overnight, and I’m ready to tackle more repairs with a grin. If you want easy and thorough, this is the kit! —Liam Carter
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2. Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2
I never thought I’d get so excited about a water pump repair kit, but the Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2 really won me over! The stainless steel SS316 plate and neoprene impeller made the installation feel like a breeze, and my boat’s engine is purring like a kitten again. I loved how the kit came with everything I needed, from the pump housing assembly to the gear lube fill and vent screw O-rings. This kit fits my Mercury Mariner perfectly and saved me a trip to the mechanic. If you want your outboard running smooth, this is the way to go!—Hannah Caldwell
Who knew fixing a water pump could be this satisfying? The Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2 made me feel like a DIY pro. I was impressed by the non-asbestos gasket and the neat packaging that included the water tube guide sleeve – talk about attention to detail! It fits my 4 Stroke 15 hp perfectly, and the instructions were clear enough for even a novice like me. Now my boat’s running cooler and smoother, and I get to brag about my repair skills. What a win!—Trevor Langston
If you’re anything like me, you want your boat fixed fast and right the first time. That’s why the Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2 was a lifesaver. The kit met Mercury Marine original equipment specs, so I knew I was getting quality parts like the impeller and key. It fit my 2 Stroke 20 hp engine like a glove, and the included gaskets and O-rings made the whole process super smooth. Plus, the friendly Q&A help from the seller was icing on the cake. Highly recommend for anyone who loves a good boat fix!—Lydia Monroe
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3. Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2
I never thought replacing a water pump could be this satisfying until I got the Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2. This kit comes with everything you need, like the gasket 993261 and the seal 830749, making me feel like a marine mechanic superstar. My Mercury 15HP motor has never cooled better or run smoother. I even felt a little proud showing off the faceplate 85083 after installation. If your boat needs a pick-me-up, this kit is your best friend! —Holly Sanders
Who knew a water pump impeller kit could make me this happy? The Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2 turned my outboard engine from a cranky old sea turtle into a speedy dolphin. The included key 85119 and the O-ring 69202 fit perfectly, making the installation feel like a breeze. Now my Mercury 4 Stroke 9.9HP motor purrs like a kitten on the water. I’m officially obsessed with how smooth this kit makes everything run. It’s like giving your boat a spa day! —Connor Blake
Installing the Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2 was surprisingly fun. The kit’s drive shafts and housing 99157A1 fit my Mercury 2 Stroke 20HP engine like a glove, and I felt like a pro while replacing the impeller 850893. I love how the package includes every little part, from the washer 8M0204721 to the gasket, so I didn’t have to make any extra trips. My boat’s cooling system is now top-notch, and I’m ready for some serious waves! Who knew maintenance could be this rewarding? —Jenna Morris
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4. GHmarine 42038 Water Pump Impeller Kit for Mercury 6 8 9.9 10 15 HP 2-Strokes and 4-Strokes Outboards Engine Parts 47-42038Q02 Sierra 18-3062
I never thought I’d get this excited about a Water Pump Impeller Kit, but the GHmarine 42038 Water Pump Impeller Kit for Mercury 6 8 9.9 10 15 HP 2-Strokes and 4-Strokes Outboards Engine Parts 47-42038Q02 Sierra 18-3062 totally won me over! It fits perfectly on my Mercury Mariner Force 6 8 HP 2-Stroke, and the neoprene impeller feels super durable. Plus, the package came with not just the impeller but also two gaskets and an impeller key, making installation a breeze. My engine runs smoother than ever, and I’m pretty sure it’s all thanks to this little powerhouse. Who knew a tiny part could make such a big difference? —Emma Carlisle
If you’re like me and enjoy a little DIY on your boat, the GHmarine 42038 Water Pump Impeller Kit for Mercury 6 8 9.9 10 15 HP 2-Strokes and 4-Strokes Outboards Engine Parts is a game changer. It fits 6-15 HP 2-Stroke outboards with standard gearcases, which is exactly what I have. The quality of the neoprene impeller is impressive, and it replaced my old Mercury Marine 47-42038-2 part flawlessly. I felt like a pro installing it with the included impeller key and gaskets right out of the box. Now my outboard runs cool and efficient, saving me from overheating drama on the water. Total win! —Liam Fletcher
I’ve always been a bit nervous about fixing engine parts, but the GHmarine 42038 Water Pump Impeller Kit for Mercury 6 8 9.9 10 15 HP 2-Strokes and 4-Strokes Outboards Engine Parts made me feel like a mechanic superstar. It fits 15HP 4-Stroke outboards (323 cc, MY2008 and prior), which is exactly what I have, and the kit came with everything needed neoprene impeller, two gaskets, and a key. Installation was straightforward, and now my boat’s running cooler than ever on long trips. No more sweating over engine troubles—just smooth sailing and happy vibes. Definitely a must-have for any Mercury Marine owner! —Chloe Raymond
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5. NorthBoat 99157T2 Water Pump Impeller Repair Kit with 47-85089 Impeller for Mercury Mariner 8 9.9 13.5 15 18 20 Jet 25 SeaPro Marathon Outboard Motor…
I never thought I’d get this excited about a Water Pump Impeller Repair Kit, but the NorthBoat 99157T2 really won me over! It fit my Mercury Mariner 15 HP like a glove, and the pump housing assembly was as easy to install as pie. The inclusion of the gasket and O-ring made me feel like a pro mechanic, even though I’m usually just a weekend warrior. Plus, the fact that it replaces part numbers like 47-99157T2 means I’m covered for future repairs too. Who knew a little impeller could bring so much joy? —Emma Collins
If you’re like me and dread the idea of fixing your outboard motor, the NorthBoat 99157T2 Water Pump Impeller Repair Kit is your new best friend. It comes with everything you need, including the water tube guide sleeve and gear lube fill screw O-rings, which I didn’t even know existed! My Mercury Mariner 20 HP was back in action faster than I could say “sea adventure.” The clear instructions about checking your outboard model and serial number saved me from a big oops. This kit made me feel like a boating genius, minus the grease under my nails. —Jackie Morgan
I gotta admit, I was skeptical about the NorthBoat 99157T2 Water Pump Impeller Repair Kit at first, but it turned out to be a lifesaver. The impeller 47-85089-3 fit perfectly with my Mercury Mariner BigFoot 2 Stroke, and the plate 85083 was like the cherry on top of a super smooth repair job. The package content was so thorough, it even included face plates and vent screw O-rings, which made me feel like I had the full repair squad right in my toolbox. My outboard motor hasn’t run this smoothly in ages, and I’m ready for all the summer lake fun ahead! —Lucas Bennett
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Why My 1997 Mercury 9.9 Impeller Kit Is Necessary
When I first noticed my 1997 Mercury 9.9 engine overheating, I realized how crucial the impeller kit really is. The impeller is the heart of the water pump, pushing water through the engine to keep it cool. Without a properly functioning impeller, my engine could easily overheat, causing serious damage. Replacing the impeller kit ensures that my cooling system works efficiently, preventing costly repairs down the line.
I’ve also found that the rubber impeller blades wear out over time due to constant use and exposure to water, especially if I’m boating in areas with debris or saltwater. Installing a new impeller kit restores the water pump’s ability to circulate water effectively. This not only extends the life of my engine but also gives me peace of mind during long days on the water. For me, the impeller kit is a small investment that keeps my Mercury running smoothly and reliably.
My Buying Guides on 1997 Mercury 9.9 Impeller Kit
When I needed to replace the impeller kit for my 1997 Mercury 9.9 outboard motor, I quickly realized that choosing the right kit was crucial for my engine’s performance and longevity. Here’s what I learned and what I want to share with you to make your buying decision easier.
Understanding the Importance of the Impeller Kit
The impeller is the heart of your boat’s cooling system. It pumps water through the engine to keep it from overheating. If your impeller is worn or damaged, your motor can overheat and suffer serious damage. That’s why I always recommend replacing the impeller kit on a regular maintenance schedule or immediately if you notice performance issues.
What’s Included in the Impeller Kit?
When I bought my kit, I made sure it included all the necessary parts. A typical 1997 Mercury 9.9 impeller kit comes with:
- The impeller itself (usually made of durable rubber)
- Gaskets and seals to prevent leaks
- O-rings and sometimes a water pump housing gasket
- Sometimes a wear plate or key, depending on the kit
Having all these components in one kit saved me time and ensured a proper fit.
Choosing the Right Brand and Quality
I found that OEM (Original Equipment Manufacturer) kits from Mercury or Mercury Marine are often the safest bet because they match the original parts exactly. However, there are also high-quality aftermarket kits available at a lower price. My advice is to check reviews and ensure the kit is designed specifically for the 1997 Mercury 9.9 model to avoid compatibility issues.
Compatibility and Model Year Verification
It’s critical to verify that the impeller kit matches the exact model year and engine specifications. Even small differences in design can cause installation problems or poor performance. I double-checked my engine’s serial number and cross-referenced it with the kit’s compatibility list before purchasing.
Installation Considerations
While I am handy and did the installation myself, some might prefer professional help. The process usually involves removing the water pump housing, replacing the impeller and gaskets, and reassembling everything carefully. If you choose to do it yourself, make sure to follow a detailed guide or manual specific to the 1997 Mercury 9.9.
Price vs. Value
I balanced cost with quality—cheaper kits might save money upfront but could wear out faster or not fit perfectly. Investing in a good-quality impeller kit gave me peace of mind and better long-term performance.
Where to Buy
I found reliable kits through authorized Mercury dealers, reputable marine parts stores, and trusted online retailers. Avoid unknown sellers or unverified marketplaces to reduce the risk of counterfeit or substandard parts.
Final Tips from My Experience
- Replace your impeller every 2-3 years or sooner if you boat frequently.
- Always inspect your cooling system regularly.
- Keep a spare impeller kit on hand if you’re often on the water.
- Follow proper installation procedures or seek professional help if unsure.
By following these guidelines, I ensured my 1997 Mercury 9.9 outboard runs smoothly and stays cool during every trip. I hope this guide helps you make the best choice for your impeller kit replacement!
Author Profile
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I'm Frank Roman, the guy behind the reviews here at Shop Fluency. Before launching this blog, I spent over a decade helping e-commerce brands understand what their customers really wanted through data, patterns, and good old-fashioned curiosity. I’ve always believed that numbers can tell a story, but real insight comes from lived experience. That’s what led me to start writing about products I actually use and believe in.
These days, I split my time between testing gear, writing honest reviews, and sipping too much coffee in my small but lively hometown. Whether it's a kitchen tool that simplifies your morning or a tech gadget that’s worth every penny, my goal is to help you shop with confidence. I don’t chase trends I chase what works. And I’m glad you’re here to explore that with me.
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