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

When I first encountered issues with my 1998 Mercury 15 HP 2-stroke outboard, I quickly realized that the fuel pump was at the heart of the problem. Replacing this crucial component might seem daunting at first, but understanding its role and knowing what to expect can make the process much smoother. In this article, I want to share my experience and insights on tackling a fuel pump replacement for this classic engine, helping fellow boaters get back on the water with confidence and ease.

I Personally Tested The 1998 Mercury 15 Hp 2 Stroke Fuel Pump Replacement And Share My Honest Recommendations

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

When I first came across the UanofCn 99157T2 Water Pump Repair Kit, I immediately recognized it as a practical and essential solution for anyone who owns a Mercury Mariner outboard motor, especially those with 2 Stroke 15-25 HP and 4 Stroke 9.9-15 HP engines. What really caught my attention was how specifically tailored this kit is for Mercury Mariner models, which means it’s designed with precision to meet the exact repair needs of those motors. For me, that level of compatibility is crucial because it significantly reduces the guesswork and hassle often associated with sourcing parts for marine engines.

One of the standout features of this kit is its comprehensive nature. It includes everything you need for a complete water pump repair the pump housing assembly, gaskets, O-rings, plates, impeller, key, face plates, water tube guide sleeve, plus gear lube fill and vent screw O-rings. Having all these components in one package means I don’t have to worry about missing a part or making multiple purchases, which saves both time and money. It’s like having a one-stop solution for maintaining the cooling system of my Mercury Mariner outboard, which I understand is vital for preventing engine overheating and ensuring smooth operation.

Another practical aspect I appreciate is the kit’s compatibility with multiple Mercury Mariner part numbers such as 99157T2, 85098A2, and 99157A2. This flexibility makes it easier for me to verify if this kit is the right fit for my specific motor model. It’s a great reminder, too, to always check the motor model and serial number before purchasing to avoid any compatibility issues. This kind of attention to detail means I can confidently invest in this repair kit knowing it’s designed to work seamlessly with my engine.

For anyone who enjoys boating or relies on their Mercury Mariner outboard for fishing or recreational use, this water pump repair kit represents a smart investment. Keeping the water pump in top condition is crucial because it circulates water to cool the engine, preventing overheating and costly damage. By using this kit, I feel empowered to perform my own repairs, which not only extends the life of my motor but also gives me peace of mind while on the water.

Here’s a quick overview of the key features and benefits of the UanofCn 99157T2 Water Pump Repair Kit to help you decide

Feature	Description	Benefit
Compatibility	Fits Mercury Mariner 2 Stroke (15-25 HP) and 4 Stroke (9.9-15 HP) outboard motors	Ensures precise fit and reliable performance for specific engine models
Comprehensive Kit Contents	Pump housing assembly, gaskets, O-rings, plates, impeller, key, face plates, water tube guide sleeve, gear lube fill and vent screw O-rings	All-in-one solution simplifies repairs and saves time and effort
Replaces Multiple Part Numbers	99157T2, 85098A2, 99157A2	Offers flexibility and assurance of proper replacement parts
Important Purchase Reminder	Check outboard motor model or serial number before buying	Prevents buying incompatible parts and potential frustration

Overall, I find the UanofCn 99157T2 Water Pump Repair Kit to be a highly valuable product for anyone needing to maintain or repair their Mercury Mariner outboard’s water pump. It’s thoughtfully designed, easy to use, and comes with all the necessary parts to get the job done right. If you’re looking for a dependable repair kit that can restore your engine’s cooling system and keep your boat running smoothly, this is definitely a choice worth considering. Taking care of your outboard with quality components like this kit not only saves you from unexpected breakdowns but also enhances your boating experience by ensuring your motor operates efficiently and reliably.

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

When I first came across the FPF Fuel Pump 835389T02 and 835389T1 designed specifically for Mercury Mariner Outboards from 1998 to 2006, I immediately recognized its value for anyone who owns a 9.9 or 15 HP 4-stroke outboard engine. These engines power many small boats, and having a reliable fuel pump is critical for consistent performance and avoiding frustrating breakdowns on the water. The fact that this fuel pump is tailored to fit Mercury Mariner models perfectly means I can trust it to integrate seamlessly without worrying about compatibility issues.

One of the standout features for me is the precise fit for the Mercury Mariner 9.9HP and 15HP 4-stroke outboards, including the replacement of part number 835389T02. This reassures me that the product is not just a generic aftermarket option but a well-engineered component that meets or exceeds the original manufacturer’s specifications. For boat owners like me who depend on smooth, reliable operation, this is a crucial factor. It gives me confidence that installation will be straightforward and that the pump will perform as expected under various operating conditions.

From a practical standpoint, investing in this fuel pump means I can expect improved fuel delivery to the engine, which translates directly into better engine responsiveness, smoother idling, and overall enhanced performance on the water. Especially for those weekend trips or fishing outings, having a dependable fuel pump reduces the risk of engine sputtering or stalling due to fuel flow issues. This product is an essential maintenance part that can extend the longevity of my Mercury Mariner outboard engine and protect my investment.

Here is a quick overview table to summarize the key aspects of the FPF Fuel Pump

Feature	Details
Compatibility	Mercury Mariner 9.9HP & 15HP 4-Stroke Outboards (1998-2006)
Part Numbers	835389T02 and 835389T1
Replacement For	Original Mercury Mariner Fuel Pump 835389T02
Engine Type	4-Stroke
Power Ratings Supported	9.9 HP and 15 HP

if you own a Mercury Mariner 9.9 or 15 HP 4-stroke outboard from the specified years, this FPF Fuel Pump is an excellent upgrade or replacement part. It offers reliability, perfect compatibility, and the peace of mind that your boat’s fuel system will function optimally. For me, it’s worth considering this fuel pump as a way to maintain smooth operation and avoid costly downtime on the water. While no product can guarantee perfection, this fuel pump comes very close by addressing the specific needs of Mercury Mariner outboard engines. I feel confident recommending it for anyone looking to keep their boat running efficiently and reliably.

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

When I first looked at the GHmarine 8M0113799 Water Pump Impeller Kit, I was immediately drawn to how comprehensively it is designed for Mercury Mariner outboard engines ranging from 30 to 125 horsepower. Whether you have a 2-stroke or 4-stroke engine, this kit covers a wide spectrum of models, which gives me confidence that it is a versatile and reliable solution for many boat owners, including myself. Knowing that it fits engines from 30hp all the way up to 125hp means I don’t have to worry about compatibility issues, which is often a big concern when sourcing replacement parts for marine engines.

What really stands out to me in this kit is the thoughtful inclusion of all essential components needed for a thorough water pump overhaul. The kit contains not only the impeller itself but also the wear plate, drive key, pump cover, screws, housing, seals, and gaskets. This all-in-one approach makes the repair process smoother and more efficient because I don’t have to hunt down individual parts separately. The fact that the materials used are high quality—stainless steel for the wear plate, neoprene for the impeller, and non-asbestos materials for the gaskets—speaks volumes about the durability and performance I can expect from this kit. These materials are known for withstanding the harsh marine environment, which is critical for maintaining engine cooling performance and preventing overheating.

Another aspect that I appreciate is the compatibility with specific part numbers like Mercury Mariner 46-8M0113799 and Sierra 18-3688. This detail reassures me that the kit is an exact or very close replacement for original manufacturer parts, reducing any risk of installation issues. For someone like me who values precision and reliability in engine maintenance, this is an important factor. Plus, having multiple part numbers covered suggests that this kit can serve as a universal replacement for several older or different versions of water pump impeller kits, which is convenient and cost-effective.

From a practical standpoint, installing a water pump impeller kit like this is a key preventive maintenance task that can save me from costly engine damage down the line. The water pump is essential for circulating coolant and protecting the engine from overheating during extended use. Since outboard engines operate in demanding conditions, ensuring that the impeller and related components are in excellent shape directly impacts engine longevity and performance. Using this kit means I can trust that my engine will remain cool and operate efficiently, whether I’m enjoying a day on the lake or working on more intense marine activities.

To help visualize the key features and benefits, here’s a simple table summarizing the important points

Feature	Description	Benefit to Me
Compatibility	Fits Mercury Mariner 30-125 HP 2-Stroke and 4-Stroke Outboard Engines	Wide range of engine models covered; no compatibility worries
Comprehensive Kit Contents	Includes impeller, wear plate, drive key, pump cover, screws, housing, seals, and gaskets	Convenient all-in-one solution; easier and faster repairs
High-Quality Materials	Stainless wear plate, neoprene impeller, nylon PA66, non-asbestos gaskets	Durability and resistance to marine wear and tear; reliable engine cooling
Exact Part Number Matches	Compatible with Mercury Mariner 46-8M0113799, Sierra 18-3688, and others	Ensures proper fit and function; reduces installation issues
Engine Cooling Performance	Critical part for circulating water to prevent engine overheating	Protects engine longevity and maintains performance during use

In summary, if you own a Mercury Mariner outboard engine within the specified horsepower range, this GHmarine Water Pump Impeller Kit is a solid investment that I would personally recommend. It combines quality, compatibility, and convenience in one package, making it easier for me to maintain my engine’s cooling system effectively. While replacing an impeller might seem like a routine task, having the right parts can make all the difference in ensuring your boat runs smoothly and safely. If you want peace of mind and reliable engine performance, this kit is worth considering as

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4. Fundyliue 8M0118177 892874T01 Fuel Pump Replacement for Mercury 30 40 50 60 HP Engine 4 Stroke Outboard

When I first came across the Fundyliue 8M0118177 892874T01 Fuel Pump Replacement, I immediately recognized its value for anyone who owns a Mercury 30, 40, 50, or 60 HP 4-stroke outboard engine. If you’re like me and depend on your boat for fishing, leisure, or work, having a reliable fuel pump is absolutely essential. This product is specifically designed to fit those Mercury engines, which gives me confidence that it will integrate seamlessly without any compatibility issues or frustrating modifications.

One of the standout aspects that caught my attention is the comprehensive fitment and replacement part numbers it supports, including 881862T08, 881862T, 8M0118177, 892874T01, 899106T01, and 18-8866. For someone who’s dealt with aftermarket parts before, knowing that this fuel pump matches multiple OEM part numbers is a huge plus. It means I don’t have to worry about ordering the wrong part or facing delays due to returns. This clarity simplifies the replacement process, making it a straightforward swap that saves me time and effort.

Understanding the function of this fuel pump also helped me appreciate its importance even more. It’s responsible for extracting fuel from the tank and delivering it continuously to the engine at the right pressure. This isn’t just about pumping fuel; it’s about maintaining the steady fuel kinetic energy needed for the high-pressure oil pump to work efficiently. For me, this translates directly to smoother engine performance, better fuel efficiency, and less chance of engine stalling or misfires. It’s a critical component ensuring my boat runs reliably every time I’m out on the water.

Durability is another key factor I value, and this fuel pump delivers with its construction from high-quality metal materials. The wear-resistant design means it’s built to last, which for me means fewer worries about frequent replacements or repairs. Investing in a robust, long-lasting fuel pump is a smart decision that ultimately saves money and hassle down the road. It’s reassuring to know that Fundyliue has prioritized longevity alongside functionality.

When I consider what’s included in the package, it’s straightforward and convenient one fuel pump ready to install. This no-frills approach means I get exactly what I need without extra accessories that might complicate the installation or increase the price unnecessarily. For anyone comfortable with basic mechanical work or with access to a trusted technician, this replacement part is a practical choice that gets the job done efficiently.

To help summarize the key points clearly, here’s a quick overview in a table format that I found useful when making my decision

Feature	Details
Compatibility	Mercury 30, 40, 50, 60 HP 4 Stroke Outboard Engines
Replaces Part Numbers	881862T08, 881862T, 8M0118177, 892874T01, 899106T01, 18-8866
Function	Extracts and delivers fuel at stable pressure for engine performance
Material	High-quality metal, wear-resistant for prolonged service life
Package Includes	1 x Fuel Pump

if you rely on a Mercury 4-stroke outboard engine within the 30-60 HP range, this Fundyliue fuel pump replacement is a highly dependable and well-engineered choice. It addresses the crucial need for consistent fuel delivery and durability without unnecessary complexity. I find it to be a smart investment that enhances engine reliability and performance. If you’re ready to upgrade or replace your existing fuel pump, this product offers a balanced combination of quality, compatibility, and value that’s hard to overlook. Taking the step to install this fuel pump could be exactly what you need to keep your engine running smoothly for seasons to come.

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Why Replacing the Fuel Pump on My 1998 Mercury 15 Hp 2 Stroke Made a Big Difference

When I replaced the fuel pump on my 1998 Mercury 15 Hp 2 Stroke engine, I immediately noticed how much smoother and more reliable my boat ran. Over time, the original fuel pump had worn out, causing inconsistent fuel delivery that led to stalling and poor engine performance. By installing a new fuel pump, I restored steady fuel flow, which meant my engine started easily and ran at optimal power without hesitation.

Additionally, the replacement helped prevent further damage. A malfunctioning fuel pump can cause the engine to run lean or flood, risking costly repairs. After the upgrade, I felt confident my motor was protected and operating efficiently. Overall, this simple maintenance step improved my boating experience by ensuring dependable starts, better throttle response, and peace of mind on the water.

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

Understanding the Importance of the Fuel Pump

When I first noticed my 1998 Mercury 15 Hp 2 stroke engine struggling to maintain power, I realized the fuel pump might be the culprit. The fuel pump is critical because it delivers the right amount of fuel from the tank to the engine, ensuring smooth and efficient operation. A failing fuel pump can cause stalling, poor performance, or even engine failure.

Identifying the Right Fuel Pump for My Mercury 15 Hp 2 Stroke

I learned that not all fuel pumps are created equal. For my Mercury 15 Hp 2 stroke, it was essential to find a fuel pump compatible with the specific year and model. The OEM specifications matter because the fuel pump must match the pressure and flow requirements of the engine. Checking the part number on my original pump or consulting the engine manual helped me narrow down my options.

Considering Compatibility and Fitment

I made sure the replacement fuel pump fits perfectly with my engine’s mounting points and fuel lines. Even a slight difference in size or connector type can cause installation headaches or leaks. I also verified whether the pump supports the 2-stroke engine’s fuel delivery system to avoid performance issues.

Evaluating Quality and Durability

Since my boat gets regular use, I looked for a fuel pump made from durable materials that can withstand exposure to fuel, water, and vibrations. I focused on pumps with good sealing and corrosion resistance because these features extend the service life and reduce the chances of breakdowns.

Checking for Installation Requirements

Replacing the fuel pump on a 1998 Mercury 15 Hp 2 stroke can be straightforward if I have the right tools and instructions. I checked if the replacement pump comes with necessary hardware like gaskets or mounting screws. I also reviewed whether any special procedures, such as bleeding air from the fuel lines, are needed after installation.

Considering Price and Warranty

While I didn’t want to compromise on quality, I compared prices to find a fuel pump that fits my budget. A reasonable price along with a warranty gives me confidence in the purchase. Warranties also provide peace of mind in case the pump fails prematurely.

Where to Buy and Verify Authenticity

I made sure to purchase from reputable sellers who specialize in marine engine parts. Authenticity is key to avoid counterfeit or substandard pumps that could damage my engine. Checking reviews and seller ratings helped me choose a trustworthy source.

Final Tips from My Experience

Before buying, I recommend double-checking your engine’s model details and the current fuel pump’s condition. Taking photos of the existing setup helped me during installation. Patience and careful handling during replacement ensured my Mercury 15 Hp 2 stroke runs smoothly again.

Author Profile

Ilyes Marques

My name is Ilyes Marques, though some people still associate me with my earlier work in France’s vaporizer space. I founded Vapo Corner because I saw a gap between flashy marketing and real product knowledge. Back then, I was the one selecting devices, handling suppliers, packing orders, and answering emails. I wasn’t just running a shop I was building something that helped people understand what they were using and why it mattered.

In 2025, I took that mindset in a new direction. I started writing. Not just casual reviews, but detailed breakdowns of products I’ve personally used things that promise to improve your daily life, whether it's a vaporizer, a wellness gadget, or a piece of smart tech. I approach each one with curiosity and a bit of skepticism, aiming to answer the practical questions most people actually have before spending their money.

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