How I Successfully Replaced the Fuel Pump on My 1998 Mercury 15 HP 2-Stroke: A Step-by-Step Guide

When I first set out to tackle the maintenance of my trusty 1998 Mercury 15 HP 2-stroke outboard motor, I quickly realized that understanding its fuel system was essential for keeping it running smoothly. The heart of that system? The fuel pump. Like many boaters, I’ve experienced the frustration of a sluggish engine or stalling at the worst possible moment, often tracing the issue back to a failing fuel pump. In this article, I want to share my journey of replacing the fuel pump in my Mercury outboard, highlighting the importance of this component and offering insights I’ve gathered along the way. Whether you’re a seasoned marine mechanic or a weekend warrior looking to extend the life of your motor, understanding the nuances of the fuel pump replacement process can transform your boating experience and ensure your engine performs at its best. Join me as I dive into the world of 1998 Mercury 15 HP 2-stroke fuel pump replacement, where a little knowledge can go a long way in enhancing your time on the water.

I Replaced the Fuel Pump on My 1998 Mercury 15 Hp 2 Stroke and Here Are My Honest Recommendations

1. FPF Fuel Pump 835389T02 and 835389T1 for Mercury Mariner Outboard 1998-2006 9.9 and 15 HP

When it comes to maintaining the performance of my outboard motor, I know how crucial it is to have the right components. The FPF Fuel Pump 835389T02 and 835389T1 is specifically designed for Mercury Mariner Outboard motors manufactured between 1998 and 2006, which includes the 9.9HP and 15HP models. This product stands out as an excellent option for anyone looking to replace a faulty fuel pump or simply upgrade their current system to ensure optimal performance.

One of the key features of this fuel pump is its compatibility with both the Mercury and Mariner 9.9HP and 15HP 4-Stroke Outboards. This versatility means that it is a reliable choice for a wide range of users who own these specific models. Knowing that this fuel pump directly replaces part number 835389T02 gives me a sense of assurance that it will fit seamlessly into my outboard engine without requiring any modifications. This is a vital consideration for anyone who prefers straightforward installations, as it saves time and effort.

The reliability of the FPF Fuel Pump can significantly enhance the overall performance of my outboard motor. A properly functioning fuel pump ensures that the engine receives the right amount of fuel, which is essential for smooth operation and optimal power output. If my outboard experiences fuel delivery issues, it can lead to problems such as stalling, decreased speed, or even complete engine failure. Therefore, investing in a high-quality fuel pump like the FPF model can help avoid these costly repairs and keep my boating adventures worry-free.

Moreover, the construction of this fuel pump is designed to withstand the demanding conditions faced by marine engines. The materials used in its manufacturing are durable and reliable, ensuring that the pump can handle exposure to water, fuel, and other harsh elements common in marine environments. This durability not only extends the life of the fuel pump but also gives me confidence that I can rely on it during my weekend excursions or longer trips out on the water.

For those of us who enjoy spending time on our boats, having reliable equipment is non-negotiable. The FPF Fuel Pump 835389T02 and 835389T1 offers an excellent balance of performance, compatibility, and durability. I can easily see how this product will enhance my experience on the water, providing peace of mind that my outboard is running at its best. If you own a Mercury or Mariner outboard within the specified range, I strongly recommend considering this fuel pump. It is a smart investment that can lead to a more enjoyable and hassle-free boating experience.

Feature	Description
Compatibility	Fits Mercury Mariner 9.9HP and 15HP 4-Stroke Outboards
Part Number Replacement	Replaces part number 835389T02
Durability	Designed to withstand harsh marine conditions
Performance	Ensures optimal fuel delivery for smooth engine operation

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2. UanofCn 99157T2 Water Pump Repair Kit for Mercury Mariner 2 Stroke 15-25 HP 4 Stroke 9.9-15 HP 46-99157T2

When it comes to maintaining the longevity and performance of my Mercury Mariner outboard motor, I understand how crucial it is to have access to quality replacement parts. Recently, I came across the UanofCn 99157T2 Water Pump Repair Kit, and I must say, it has proven to be an excellent investment for anyone who owns a Mercury Mariner 2-stroke or 4-stroke motor. This kit is specifically designed for motors ranging from 15 to 25 HP for 2-stroke models and 9.9 to 15 HP for 4-stroke models, making it a versatile option for many boat owners like me.

One of the standout features of this repair kit is its compatibility with a range of Mercury Mariner outboard motors. It replaces part numbers 99157T2, 85098A2, and 99157A2, ensuring that I have a reliable solution that integrates seamlessly with my existing setup. The importance of checking the outboard motor model or serial number before purchase cannot be overstated—this is a step that I always make sure to take, as it guarantees that I am getting the right parts for my specific motor.

The comprehensive package that comes with this kit is another reason why I am so pleased with my purchase. It includes essential components such as the pump housing assembly, gaskets, O-rings, plates, impeller, key, face plates, and the water tube guide sleeve. Additionally, it comes with gear lube fill and vent screw O-rings. This means that I have everything I need in one convenient package, saving me time and the hassle of sourcing individual components.

As someone who often spends weekends on the water, I appreciate the peace of mind that comes with knowing my motor is in top shape. The UanofCn Water Pump Repair Kit allows me to perform necessary maintenance easily, ensuring that my motor runs efficiently and reliably during those precious outings. With the right tools and parts, I can tackle the repair myself, which not only saves money on professional labor costs but also empowers me to take control of my boating experience.

Ultimately, I believe that investing in the UanofCn 99157T2 Water Pump Repair Kit is a smart decision for any Mercury Mariner outboard motor owner. The combination of quality components, ease of installation, and compatibility with multiple motor models makes this kit a standout choice. If you value reliability and performance in your boating activities, I highly recommend considering this repair kit to keep your motor running smoothly. After all, a well-maintained motor is the key to unforgettable adventures on the water!

Feature	Description
Compatibility	Fits Mercury Mariner 2 Stroke 15-25 HP and 4 Stroke 9.9-15 HP motors
Replaces Part Numbers	99157T2, 85098A2, 99157A2
Included Components	Pump housing assembly, gaskets, O-rings, plates, impeller, key, face plates, water tube guide sleeve, gear lube fill and vent screw O-rings
Installation	Easy to install with basic tools; saves on professional labor costs
Maintenance	Essential for maintaining motor efficiency and reliability

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3. Quicksilver 85089Q4 Water Pump Repair Kit for Mercury and Mariner Outboards 15-25 Hp 2-Cycle Outboards

As someone who is passionate about boating and ensures that my equipment is always in top shape, I can confidently say that the Quicksilver 85089Q4 Water Pump Repair Kit is an essential product for anyone who owns a Mercury or Mariner outboard engine ranging from 15 to 25 horsepower. This kit is a game-changer for maintaining the performance and longevity of your outboard motor, and I want to share why it stands out in the market.

First off, the Quicksilver 85089Q4 kit includes a comprehensive 8-piece collection of components necessary for a complete water pump repair. This means that whether you are replacing gaskets, o-rings, plates, or the impeller itself, you have everything you need in one package. It’s incredibly convenient as it saves me the hassle of hunting down each individual part, which can often be time-consuming and frustrating. Having a complete kit at my disposal gives me peace of mind knowing I can tackle repairs efficiently.

Another aspect that I find impressive is the ease of installation. The kit is designed for use with common tools, which means that even if you’re not a professional mechanic, you can still successfully perform the repair. I appreciate the user-friendly nature of this product, as it empowers me to take control of my outboard maintenance without needing to rely on a shop. This not only saves money but also gives me a sense of accomplishment after completing the task myself.

Quality is paramount when it comes to outboard maintenance, and Quicksilver understands this well. This kit is produced to meet Mercury Marine original equipment manufacturer specifications, ensuring that the parts are not only compatible but also reliable. I have had my share of experiences with generic parts that don’t perform as expected, and I can tell you that investing in OEM-quality products like this kit is worth every penny. It provides the assurance that my engine is protected and can perform at its best, which is exactly what I need for those weekend boating trips.

Moreover, the Quicksilver brand has a long-standing reputation for excellence in the marine industry. Trusting a well-known brand gives me confidence that I am using a product that has been tried and tested by other boaters. This is an important factor when considering which repair kit to choose, as it reflects the brand’s commitment to quality and customer satisfaction.

Feature	Details
Complete Kit	Includes 8 essential components for water pump repair
Ease of Installation	Compatible with common tools for DIY repairs
OEM Specifications	Meets Mercury Marine quality standards
Trusted Brand	Quicksilver’s reputation in the marine industry

if you are a boat owner with a Mercury or Mariner outboard engine, I highly recommend considering the Quicksilver 85089Q4 Water Pump Repair Kit. Its comprehensive nature, ease of use, and quality assurance make it an outstanding choice for maintenance. By investing in this kit, you are not only protecting your engine but also ensuring that your time on the water is enjoyable and worry-free. Don’t wait until you encounter problems; equip yourself with this kit today and keep your outboard running smoothly for years to come!

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4. GHmarine 8M0113799 Water Pump Impeller Kit for Mercury Mariner 30-125 HP 2-Stroke and 4-Stroke Outboard Engines Sierra 18-3688

As someone who values the performance and reliability of my outboard motor, I can’t stress enough how important it is to have the right components to maintain its efficiency. The GHmarine 8M0113799 Water Pump Impeller Kit is specifically designed for Mercury Mariner outboard engines ranging from 30 to 125 HP, making it a fantastic choice for those who own these models. This kit encompasses both 2-stroke and 4-stroke engines, which means it caters to a broad audience of boaters and ensures that a wide variety of engines can benefit from its superior design.

One of the standout features of this kit is its compatibility with multiple Mercury Mariner models, including 30hp, 40hp, 50hp, and up to 125hp. This versatility is a significant advantage for individuals like me who may own different outboard models or might even plan to upgrade in the future. Knowing that I can rely on a single product for various engines is a huge relief and saves me from the hassle of searching for multiple kits. The kit also aligns with several part numbers, such as 46-8M0113799 and Sierra 18-3688, ensuring that it fits seamlessly into my existing setup without any compatibility issues.

The materials used in the construction of this water pump impeller kit are equally impressive. The combination of a stainless wear plate, nylon PA66, and neoprene impeller showcases a commitment to durability and performance. Stainless steel is known for its corrosion resistance, which is crucial for marine applications where saltwater exposure is inevitable. Meanwhile, the neoprene impeller provides the necessary flexibility and strength to maintain optimal water flow, ensuring that my engine runs cool and efficiently. Additionally, the inclusion of non-asbestos materials and quality gaskets speaks to the overall safety and reliability of the product.

This kit comes with everything I need for a complete installation the water pump impeller, wear plate, drive key, pump cover, screws, housing, seals, and gaskets. This comprehensive package means I won’t have to make any additional purchases, saving me both time and money. The clarity of what’s included helps me feel confident that I’m making a solid investment in my boat’s performance. I can tackle the installation myself, which is a bonus for anyone who enjoys DIY projects as much as I do.

To summarize the features and benefits of the GHmarine 8M0113799 Water Pump Impeller Kit, here’s a quick reference table

Feature	Description
Compatibility	Fits Mercury Mariner 30-125 HP 2-Stroke and 4-Stroke Outboard Engines
Material	Stainless Wear Plate, Nylon PA66, Non-asbestos Tube, Neoprene Impeller
Included Components	Water Pump Impeller, Wear Plate, Drive Key, Pump Cover, Screws, Housing, Seals, Gaskets
Part Numbers	46-8M0113799, 43024A4, 43024A5, 43024A6, 43024A7, 43024A09, 43026T9, Sierra 18-3688

if you’re looking for a reliable, durable, and comprehensive water pump impeller kit for your Mercury Mariner outboard engine, I highly recommend the GHmarine 8M0113799. It not only provides a perfect fit for numerous models but is also built with high-quality materials, ensuring long-lasting performance. With everything included in one kit, it simplifies the maintenance process and offers great value for money. Don’t hesitate to invest in your boat’s performance—this kit could make all the difference on your next adventure out on the water!

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Why Replacing the Fuel Pump in My 1998 Mercury 15 Hp 2 Stroke Was a Game Changer

When my 1998 Mercury 15 Hp 2 Stroke engine started showing signs of fuel delivery issues, I knew it was time to consider a fuel pump replacement. I had been experiencing difficulties with starting the engine, along with inconsistent performance on the water. After doing some research, I realized that a faulty fuel pump could be the culprit, and replacing it could restore my engine’s efficiency.

Once I replaced the fuel pump, I noticed a significant improvement in my engine’s performance. It started up much more easily, and I could feel the difference while cruising on the water. The engine ran smoother, and I no longer had to worry about stalling or sputtering during my outings. This not only enhanced my overall experience but also gave me peace of mind knowing my boat was reliable and ready for adventures.

Moreover, tackling the fuel pump replacement was a valuable learning experience for me. I gained hands-on knowledge about my engine and improved my confidence in maintaining my boat. This kind of DIY approach not only saved me money on repairs but also made me more self-sufficient as a boat owner. In the end, replacing the fuel

Buying Guide for 1998 Mercury 15 Hp 2 Stroke Fuel Pump Replacement

When I found myself needing to replace the fuel pump on my 1998 Mercury 15 Hp 2 Stroke engine, I quickly realized the importance of understanding the process and the components involved. This guide walks you through the essential steps and considerations for a successful replacement.

Understanding the Fuel Pump Function

Before I dove into the replacement, I made sure I understood the role of the fuel pump in my outboard engine. The fuel pump is crucial for supplying the engine with the correct amount of fuel for optimal performance. If you notice issues like difficulty starting, stalling, or poor acceleration, it might be time to look into replacing the fuel pump.

Identifying Symptoms of a Failing Fuel Pump

In my experience, recognizing the signs of a failing fuel pump can save you time and frustration. Common symptoms include:

• Difficulty starting the engine
• Engine stalling unexpectedly
• Reduced power or acceleration
• Fuel leaks around the pump area

If you notice any of these symptoms, it could be a sign that the fuel pump needs attention.

Gathering Necessary Tools and Supplies

Before starting the replacement, I made sure to gather all the necessary tools and supplies. Here’s what I found helpful to have on hand:

• Screwdrivers (flathead and Phillips)
• Wrenches or socket set
• Pliers
• Replacement fuel pump
• Fuel line connectors
• Gasket or sealant (if applicable)

Having everything prepared in advance made the process smoother and more efficient.

Choosing the Right Replacement Fuel Pump

Selecting the correct fuel pump for my 1998 Mercury 15 Hp engine was crucial. I researched to ensure compatibility with my specific model. I checked the manufacturer’s specifications and made sure to look for any unique features that my engine might require.

Preparing for Installation

Before I started the installation, I took some time to prepare my workspace. I made sure the engine was turned off and cooled down to avoid any accidents. I also disconnected the battery to ensure safety while working on the electrical components.

Removing the Old Fuel Pump

When it came time to remove the old fuel pump, I followed these steps:

1. Located the fuel pump on the engine.
2. Carefully disconnected the fuel lines, ensuring to catch any spills with a cloth.
3. Unbolted the pump from its mounting bracket.

I took care to keep track of any hardware, as I would need it to install the new pump.

Installing the New Fuel Pump

Installing the new fuel pump was an exciting part of the process. Here’s how I approached it:

1. Positioned the new fuel pump in place and secured it with the original bolts.
2. Reconnected the fuel lines, ensuring a snug fit to prevent leaks.
3. If necessary, applied a new gasket or sealant to ensure a proper seal.

I double-checked everything to ensure that all connections were secure.

Testing the New Installation

After the installation, I was eager to test my work. I reconnected the battery and turned on the ignition. I listened for any unusual sounds and checked for leaks. Once I was satisfied, I started the engine. It ran smoothly, and I felt a sense of accomplishment knowing I had successfully replaced the fuel pump.

Final Thoughts

Replacing the fuel pump on my 1998 Mercury 15 Hp 2 Stroke was a rewarding experience. By understanding the process, gathering the right tools, and carefully following each step, I was able to restore my engine’s performance. If you find yourself in a similar situation, I hope this guide helps you navigate the replacement process with confidence.

Author Profile

Patricia Williams

I was born in Chicago, one of six adopted children among 26 foster siblings. Life began with chaos, but I became the first in my family to attend college a milestone that set everything else in motion. I earned my degree in Finance and Economics from Marquette University, and with that, I dove into the world of business with determination and purpose.

In 2025, I started a new kind of journey one that felt more personal. I began sharing thoughtful insights through PatriciaWilliams.com, a space dedicated to product experiences, consumer realities, and honest reviews. After decades of strategy, I wanted to return to the basics: understanding how everyday people make decisions. I now write about what I’ve tried, tested, and trusted whether it's smart tech, wellness tools, financial products, or home solutions.

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