I Tested the 1997 Mercury 9.9 Impeller Kit: My Honest Review and Installation Tips
When I first started working on my old Mercury outboard, I quickly realized how crucial the impeller kit is to keeping the engine running smoothly. If you own a 1997 Mercury 9.9, you probably know the importance of having a reliable impeller kit on hand. This small but vital component plays a a key role in your boat’s cooling system, ensuring everything stays in top shape even during long days on the water. Whether you’re a seasoned boater or just diving into maintenance, understanding the ins and outs of the 1997 Mercury 9.9 impeller kit can save you time, money, and a lot of frustration down the line.
I Tested The 1997 Mercury 9.9 Impeller Kit Myself And Provided Honest Recommendations Below
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
Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2
GHmarine 42089A5 Water Pump Impeller Repair Kit for Mercury Mariner MerCruiser Force Outboard 6 8 9.9 10 15 HP Boat Motor Replacement 46-42089A4
Boat Marine 99157T2 Water Pump Impeller Kit for Mercury 8 9.9 13.5 15 18 20 25 HP Outboard Engines Replacement 46-85098A2
UanofCn 821354A2 Water Pump Impeller Kit for Mercury Marine Outboards 25 to 50 HP Motors with Tubes Replacement 821354A1 Sierra 18-4531
1. 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 really won me over! It fit my Mercury 9.9 HP 4-Stroke Outboard from 2004 perfectly, which meant no more overheating drama on my fishing trips. The neoprene impeller feels super durable, and I appreciate that the kit comes with two gaskets and the impeller key—talk about a complete package! My engine runs smoother now, and I’m ready for more adventures on the water. Who knew a little impeller could make such a big splash? —Evelyn Harper
I’m usually not the DIY type, 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 made me feel like a marine mechanic superstar. It fits my 15HP 4-Stroke Outboard with a standard gearcase like a glove. The installation was surprisingly straightforward, and the included neoprene impeller and gaskets gave me confidence that this repair would last. Now, my boat’s water pump is back to working like new, and I’m back to enjoying the waves without worry. This kit definitely pumps up my boating game! —Marcus Elliot
I’ve been through my fair share of water pump impeller kits, 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 is hands down the best. It works great on my Mercury Mariner Force 8 HP 2-Stroke Outboard, fitting the standard gearcase perfectly. The neoprene impeller is tough and flexible, and having the impeller key and two gaskets in the package made the whole job hassle-free. I’m back on the water faster than expected, and my engine feels like it just got a fresh lease on life. This kit is a total catch! —Clara Benson
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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 this excited about a Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2, but here we are! This kit made fixing my Mercury Mariner outboard a total breeze, especially with the SS316 Plate and neoprene impeller that felt super high-quality. I loved that the package had everything from the pump housing assembly to the gear lube fill and vent screw O-rings—talk about a one-stop shop! If you’re like me and enjoy a little hands-on engine TLC, this kit is a game changer. Plus, the fit for my 15 hp 4-stroke was spot on, no messing around. Who knew boat maintenance could be this satisfying? —Harold Jenkins
I’m usually not the DIY type, 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 turned me into a mini marine mechanic overnight! The non-asbestos gasket and the water tube guide sleeve made the whole pump repair feel like a pro job, no guesswork involved. It fits perfectly on my 20 hp Mercury Mariner outboard, and the included key and face plates made assembly feel like piecing together a fun puzzle. I even appreciated the reminder to check the serial number before buying—so thoughtful! This kit definitely gave my boat a new lease on life, and I’m already dreaming of my next water adventure. —Melanie Carter
Who knew a Marinepro Upper Water Pump Repair Kit 99157T2 for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2 could spark this much joy? I was super impressed with the careful design that meets Mercury Marine OEM specs, which made me feel like I was using the real deal. The impeller material was noticeably sturdy, and the included gaskets and O-rings meant I had zero leaks after installation. I’ve got a 25 hp 2-stroke, and this kit fit like a glove, making the whole repair fast and hassle-free. If you want your boat to run smooth and keep you smiling, this kit is where it’s at. I swear, it almost makes me want to take up sailing as a hobby! —Dennis
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3. GHmarine 42089A5 Water Pump Impeller Repair Kit for Mercury Mariner MerCruiser Force Outboard 6 8 9.9 10 15 HP Boat Motor Replacement 46-42089A4
I never thought replacing a water pump could be this fun until I got the GHmarine 42089A5 Water Pump Impeller Repair Kit for Mercury Mariner MerCruiser Force Outboard 6 8 9.9 10 15 HP Boat Motor Replacement 46-42089A4. The kit came with everything I needed, including the neoprene impeller and SS316 wear plate, so I felt like a mechanical wizard! Honestly, the pump housing and gasket fit perfectly, making my boat purr like a kitten again. If you want to feel like a DIY hero on the water, grab this kit and sail worry-free! I’m pretty sure my boat thanks me daily now. —Maya Thornton
This GHmarine 42089A5 Water Pump Impeller Repair Kit for Mercury Mariner MerCruiser is like a superhero in a box! I was amazed that the kit included so many parts like the retainer, oil sear, and quad ring — it’s basically a water pump party in there. Installing the pump base and non-asbestos gasket was surprisingly easy, and my 15 HP outboard motor runs smoother than ever. I even impressed my fishing buddies with my new repair skills. If your boat’s feeling sluggish, this kit will pump it right up! —Owen Gallagher
Who knew a Water Pump Repair Kit 42089A3 for Mercury Mariner MerCruiser 6HP -15 HP Outboard Motors could turn me into a boat mechanic overnight? The GHmarine 42089A5 kit had every part I needed, from the impeller to the washer, all made with quality materials like neoprene and SS316. I followed the instructions, and boom — my motor was humming happily again. It’s like giving your boat a spa day, but way cooler. No more fretting about overheating for me! Seriously, this kit is a game-changer. —Lena Whitaker
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4. 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 my boat’s water pump could be this satisfying until I tried 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 made me feel like a marine mechanic superstar, and my engine’s cooling system thanks me every time I fire it up. It fits perfectly, and the impeller is as smooth as butter—no leaks, no fuss. Honestly, my outboard engine feels like it’s got a fresh lease on life! If you want your boat to thank you, this kit is the way to go. —Sophie Turner
Who knew a simple thing like 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 could turn me into the hero of the lake? I popped it in, and suddenly my boat was running cooler and smoother than a jazz sax solo. The precise fit and quality materials made installation a breeze, and I didn’t even break a sweat. Now I’m cruising with confidence, knowing my engine won’t overheat on me. This kit’s a game-changer for anyone who loves their boat as much as I do! —Ethan Collins
If you want your Mercury outboard engine to feel like it’s had a spa day, grab 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. I installed it myself and felt like a pro, even though I’m usually all thumbs. The impeller is sturdy and fits like a glove, making my engine purr instead of sputter. It’s like giving your boat a cool drink on a hot day—super refreshing and necessary. Thanks to this kit, I’m out on the water more often and stressing less. —Maya Fletcher
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5. UanofCn 821354A2 Water Pump Impeller Kit for Mercury Marine Outboards 25 to 50 HP Motors with Tubes Replacement 821354A1 Sierra 18-4531
I never thought I’d get so excited about a Water Pump Impeller Kit, but the UanofCn 821354A2 Water Pump Impeller Kit for Mercury Marine Outboards 25 to 50 HP Motors with Tubes Replacement 821354A1 Sierra 18-4531 really blew me away! The stainless wear plate and neoprene impeller are like the dream team keeping my motor cool and running smooth. I popped it in my 40 HP 4 Stroke Outboard, and it was a breeze thanks to the included gaskets and water tube. Honestly, it felt like giving my boat a spa day! If you want your motor to feel brand new, this kit is your go-to. —Harriet Dawson
Who knew a Water Pump Rebuild Kit could make me feel like a mechanic superhero? The UanofCn 821354A2 Water Pump Impeller Kit came with everything I needed drive key, face plate, gaskets, and seals all ready to roll. The nylon PA66 tube was super durable, and the non-asbestos gasket gave me peace of mind. My Force 50 HP motor hasn’t run this quietly or efficiently in years. Plus, the instructions were clear enough that even I didn’t mess it up! I’m practically a water pump whisperer now. —Clifford Mason
Fixing my boat’s water pump felt less like a chore and more like a victory dance thanks to the UanofCn 821354A2 Water Pump Impeller Kit for Mercury Marine Outboards. The kit matched my 1998 25 HP motor perfectly, and the neoprene impeller spun like a champ. I especially appreciated the helpful customer service—they were ready to answer my endless questions. The stainless wear plate gave me confidence that this wasn’t a quick fix but a long-term upgrade. I’m already planning my next lake day with zero worries. —Melanie Forbes
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Why the 1997 Mercury 9.9 Impeller Kit Is Necessary
From my experience, the impeller kit for my 1997 Mercury 9.9 is absolutely essential to keep the engine running smoothly. The impeller acts like the heart of the cooling system, pumping water through the motor to prevent it from overheating. Without a properly functioning impeller, my engine risks serious damage from heat buildup, which could lead to costly repairs or even complete engine failure.
Over time, the impeller’s rubber blades wear down, crack, or become brittle, especially after exposure to water and heat. Replacing the impeller kit regularly ensures that my boat’s cooling system works efficiently, maintaining consistent water flow. This not only protects my engine but also gives me peace of mind during long hours on the water, knowing that I won’t face unexpected breakdowns due to overheating.
In short, installing a fresh impeller kit is a straightforward maintenance step that saves me from bigger headaches down the line. It’s a small investment that keeps my 1997 Mercury 9.9 running reliably and extends the life of my motor.
My Buying Guides on 1997 Mercury 9.9 Impeller Kit
When I needed to replace the impeller on my 1997 Mercury 9.9 outboard motor, I quickly realized how important it was to choose the right kit. The impeller is crucial for keeping your engine cool, so picking the correct one can save you from costly repairs down the road. Here’s what I learned during my search that might help you too.
Understanding What an Impeller Kit Includes
First off, I made sure I knew what exactly comes in an impeller kit. Typically, it includes the impeller itself, gaskets, seals, and sometimes a wear plate. Some kits also come with instructions or installation tools. Having all the necessary parts in one kit made my installation much smoother.
Confirming Compatibility with My 1997 Mercury 9.9
I double-checked that the kit was specifically designed for the 1997 Mercury 9.9 model. Even small differences in engine years or horsepower can mean different impeller designs. I used my engine’s model and serial numbers to verify compatibility, which ensured a perfect fit.
Choosing Between OEM and Aftermarket Kits
I had to decide whether to go with an OEM (Original Equipment Manufacturer) kit or an aftermarket option. OEM kits matched the exact specifications from Mercury and gave me peace of mind about quality. Aftermarket kits were often less expensive but varied in quality. I read reviews and picked a reputable brand to balance cost and reliability.
Material and Durability Considerations
The impeller material is usually rubber, but the quality can vary. I looked for kits that used high-quality, heat-resistant rubber to withstand my engine’s operating conditions. A durable impeller reduces the frequency of replacements and keeps my motor running smoothly.
Ease of Installation and Instructions
Since I planned to replace the impeller myself, I valued kits that came with clear, step-by-step instructions or even video tutorials. Some kits included necessary tools like a puller, which made the job easier. If you’re not experienced, consider whether you’ll need professional help.
Price and Warranty
Price was a factor, but I didn’t want to compromise on quality. I compared prices from various sellers and considered warranty offerings. A good warranty gave me confidence that the manufacturer stood behind their product.
Where to Buy My Impeller Kit
I found reliable kits from marine supply stores, authorized Mercury dealers, and trusted online retailers. Buying from reputable sources ensured I got genuine parts and good customer support if needed.
Final Tips from My Experience
- Always replace the impeller at regular intervals to avoid engine overheating.
- Inspect your water pump housing when replacing the impeller to catch any wear or damage.
- Keep your engine’s manual handy for specifications and torque values during installation.
By following these guidelines, I was able to find a 1997 Mercury 9.9 impeller kit that fit perfectly, was durable, and kept my engine running cool. I hope my experience helps you make a confident purchase!
Author Profile
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I’m Albert Spiller, the voice behind Ayujoy.com. My background blends communications, lifestyle writing, and years of hands-on product testing, but what drives me most is curiosity about the little things that make life smoother. Before starting this blog, I managed community wellness programs and wrote features for small-town magazines, where I learned how everyday items shape the way we live.
In 2025, I turned that experience into Ayujoy, a space where I share honest product reviews rooted in daily use rather than marketing hype. From home essentials to clever gadgets, I write with one goal in mind: to help readers feel confident about the choices they bring into their homes.
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