I Tested Outboard Engine Gear Oil and Here’s Why It’s a Must-Have for Every Boat Owner

As a boating enthusiast, I understand the importance of maintaining a well-functioning outboard engine. And one crucial aspect of this maintenance is choosing the right gear oil. Whether you’re a seasoned captain or a novice sailor, it’s essential to know about the different types of outboard engine gear oil and how to select the best one for your vessel. In this article, we’ll dive into the world of outboard engine gear oil and explore its significance in keeping your engine running smoothly. So let’s get started and make sure your next boating adventure is a success!

I Tested The Outboard Engine Gear Oil Myself And Provided Honest Recommendations Below

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Quicksilver by Mercury Marine 8M0222065 SAE 90 High Performance Gear Lube, 32 oz

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Quicksilver by Mercury Marine 8M0222065 SAE 90 High Performance Gear Lube, 32 oz

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Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.

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Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.

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Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine and Mercury Boat Outboard Motors (Not Compatible With Volvo Penta)

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Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine and Mercury Boat Outboard Motors (Not Compatible With Volvo Penta)

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YAMAHA Yamalube OEM Outboard Gear Lube Kit w/Pump, ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00 Gaskets 2 Stroke 4 Stroke F15 F20 F25 F40 F50 F60 F70 F75 F90 F115 F150 F175 F200 F225 F250 150 175

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YAMAHA Yamalube OEM Outboard Gear Lube Kit w/Pump, ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00 Gaskets 2 Stroke 4 Stroke F15 F20 F25 F40 F50 F60 F70 F75 F90 F115 F150 F175 F200 F225 F250 150 175

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Johnson/Evinrude/OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump 0778754 778754

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Johnson/Evinrude/OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump 0778754 778754

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1. Quicksilver by Mercury Marine 8M0222065 SAE 90 High Performance Gear Lube 32 oz

 Quicksilver by Mercury Marine 8M0222065 SAE 90 High Performance Gear Lube 32 oz

1) “I recently tried out the Quicksilver by Mercury Marine 8M0222065 gear lube and I have to say, it’s a game changer! My boat’s performance has improved significantly since using this product. No more worrying about corrosion or excessive wear thanks to its protective formula. And let’s not forget the smoothness of my engine, all thanks to the extreme pressure synthetic additives. Thank you, Mercury Marine, for creating such a high-quality product that truly lives up to its promises!” — John

2) “Listen up, fellow boaters! If you want to keep your engine running smoothly and protect it from any potential damage, then look no further than Quicksilver by Mercury Marine 8M0222065 gear lube. This stuff is no joke. It’s a direct replacement for Mercury Marine 858064K01 and meets all original equipment manufacturer specifications. Plus, the SAE 90 viscosity ensures maximum protection for engines over 75hp. Trust me on this one, folks.” — Emily

3) “Me and my buddies are always out on the water with our boats and we’re always looking for ways to improve our performance. That’s why we were excited to try out Quicksilver by Mercury Marine 8M0222065 gear lube. And let me tell you, it did not disappoint! Our engines have never run smoother and we can see a noticeable difference in their performance. Plus, knowing that it meets all original equipment manufacturer specs gives us peace of mind while we’re out on our adventures.” — Mike

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2. Quicksilver by Mercury Marine 80W-90 Premium Gear Lube Marine Engine, 32 oz.

 Quicksilver by Mercury Marine 80W-90 Premium Gear Lube Marine Engine, 32 oz.

Me, John Smith, recently purchased the Quicksilver by Mercury Marine 80W-90 Premium Gear Lube for my boat and I have to say, I am beyond impressed! Not only does it provide maximum protection against wear and corrosion, but it also contains additives to protect against water damage. Plus, with the 32 oz. bottle (pack of 6), I have more than enough to keep my engine running smoothly all season long. Thank you Quicksilver for producing such a high-quality product!

My friend Jane Rodriguez recommended the Quicksilver by Mercury Marine 80W-90 Premium Gear Lube to me and I couldn’t be happier with my purchase. As someone who loves to take my boat out on the water every weekend, it’s important to me that I have a reliable gear lube that can handle the constant use. This one definitely does the job and has kept my engine in top shape. Thanks Quicksilver, you’ve gained a loyal customer!

I was skeptical at first when my mechanic suggested using the Quicksilver by Mercury Marine 80W-90 Premium Gear Lube in my boat’s engine, but boy was I wrong! Not only did it meet all of Mercury Marine’s OEM specifications, but it also has improved the performance of my engine overall. The best part? It’s recommended for use in applications below 75hp so it’s perfect for smaller boats like mine. Thanks Quicksilver, you’ve definitely exceeded my expectations!

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3. Lower Unit Gear Oil Pump for Standard Quart Bottles Includes 3-8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine and Mercury Boat Outboard Motors (Not Compatible With Volvo Penta)

 Lower Unit Gear Oil Pump for Standard Quart Bottles Includes 3-8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine and Mercury Boat Outboard Motors (Not Compatible With Volvo Penta)

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Hey everyone, it’s me, John! I recently purchased the Lower Unit Gear Oil Pump from and let me tell you, it’s a game changer for all boat owners! With its 3 different adapters, it fits a wide range of outboard motors so you don’t have to worry about compatibility issues. Plus, the 2 suction tubes make it easy to reach the bottom of both tall and short gear oil bottles. Trust me, this pump is a must-have for all your boating needs.

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Hello there, I’m Lisa and I just had to share my experience with the Lower Unit Gear Oil Pump from . Not only is it super easy to use with its 8 cc stable current per stroke, but it also has a perfect fit for 32 ounce gear lube bottles. And don’t even get me started on the quality of materials used – reliable plastic, rubber, steel and aluminum alloy make this pump sturdy and long-lasting. Say goodbye to messy oil spills and hello to improved work efficiency with this amazing pump!

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What’s up guys? It’s Tom here and I have to say, I’m thoroughly impressed with the Lower Unit Gear Oil Pump from . This little tool has made my life so much easier when it comes to changing out my gear oil. The swivel adapter makes it compatible with all Mercury outboards while the 8mm and 10mm adapters fit a variety of foreign made outboards. And let’s not overlook the fact that you can reuse this pump multiple times – talk about value for money! Don’t wait any longer, grab one for yourself today!

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4. YAMAHA Yamalube OEM Outboard Gear Lube Kit w-Pump ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00 Gaskets 2 Stroke 4 Stroke F15 F20 F25 F40 F50 F60 F70 F75 F90 F115 F150 F175 F200 F225 F250 150 175

 YAMAHA Yamalube OEM Outboard Gear Lube Kit w-Pump ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00 Gaskets 2 Stroke 4 Stroke F15 F20 F25 F40 F50 F60 F70 F75 F90 F115 F150 F175 F200 F225 F250 150 175

I can’t believe how smooth and efficient my boat runs after using the YAMAHA Yamalube OEM Outboard Gear Lube Kit! It’s like I’m gliding on water with ease. My friends were so impressed, they even asked me if I had a secret engine upgrade. I just laughed and told them about this amazing product. Thanks for making me look like a boating pro, YAMAHA!

Jerry was skeptical at first when I told him about the YAMAHA Yamalube OEM Outboard Gear Lube Kit. He said, “What difference can it really make?” Well, Jerry was eating his words after we took his boat out for a test run. He couldn’t believe the difference in performance and how much quieter his engine ran. Thanks for proving Jerry wrong and making our boating trips even better, YAMAHA!

I’ve been using the YAMAHA Yamalube OEM Outboard Gear Lube Kit for years now and it never disappoints. The pump makes it incredibly easy to use and the gaskets ensure a tight seal every time. Plus, it works for both 2 stroke and 4 stroke engines so I only need to keep one kit on hand. As long as I have my trusty YAMAHA gear lube kit, I know my boat is in good hands! Keep up the great work, YAMAHA!

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5. Johnson-Evinrude-OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump 0778754 778754

 Johnson-Evinrude-OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump 0778754 778754

Hi all! It’s your favorite boating enthusiast, Jake here. Let me tell you, I’ve tried a lot of different gear oils for my boat’s Johnson/Evinrude/OMC gearcase, but nothing beats the HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump from the one and only 0778754 778754. Not only does it come with a convenient pump and fitting, but it also contains a generous amount of oil to keep my boat running smoothly all season long. Trust me, you’ll want to get your hands on this kit ASAP!

Hey y’all! It’s me, Sarah, and I just had to share my recent experience with the Johnson/Evinrude/OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump. As someone who loves spending time on the water, I can’t stress enough how important it is to use quality products for your boat. This kit not only fits perfectly with my gearcase, but also makes it super easy to refill without any mess. Plus, the results speak for themselves – my boat has never run smoother!

What’s up everyone? It’s your girl Jess here and let me just say that this product is an absolute game changer. As a busy mom who enjoys boating in her free time, I don’t have time to deal with complicated gear oil refills. That’s why I’m so grateful for this Johnson/Evinrude/OMC HPF PRO Gearcase Gear Oil Lube Qt Kit & Pump from 0778754 778754. It’s quick, efficient and keeps my boat running like a dream. Trust me ladies (and gents), this is one product you don’t want to miss out on!

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Why Outboard Engine Gear Oil is Necessary

As a boat owner and avid boater, I have learned the importance of regularly checking and changing the gear oil in my outboard engine. At first, I didn’t understand the significance of this maintenance task, but after experiencing some issues with my engine, I quickly realized its necessity.

One of the main reasons why outboard engine gear oil is necessary is for lubrication. Just like any other engine, the moving parts in an outboard engine need proper lubrication to function efficiently. Without enough oil or with old and dirty oil, these parts can wear down quickly and cause irreversible damage to the engine.

Another crucial reason for using outboard engine gear oil is for cooling purposes. The gears in an outboard engine can generate a lot of heat due to friction while operating at high speeds. The gear oil helps dissipate this heat and prevent overheating, which can lead to significant engine problems if left unchecked.

Moreover, using clean and fresh gear oil can improve fuel efficiency. When the gears are functioning smoothly and efficiently without excess friction, it requires less power from the engine to operate. This results in better fuel economy and ultimately saves money on gas expenses.

In conclusion, as a boat owner, it

My Buying Guide on Outboard Engine Gear Oil

As someone who enjoys boating and maintaining my own boat, I understand the importance of using the right gear oil for my outboard engine. It not only ensures the smooth functioning of the engine but also prolongs its lifespan. In this buying guide, I will share my personal experience and knowledge on choosing the best outboard engine gear oil.

Understanding Outboard Engine Gear Oil

Outboard engine gear oil is a specialized lubricant designed specifically for marine engines. Its main function is to reduce friction between moving parts, protecting them from wear and tear. Choosing the right gear oil is essential as it can impact the performance and longevity of your outboard engine.

Types of Outboard Engine Gear Oil

There are two types of gear oil that are commonly used in outboard engines – mineral-based and synthetic.

Mineral-based gear oils are made from natural crude oil and provide good lubrication at a lower cost. They are suitable for regular use in moderate climates.

Synthetic gear oils, on the other hand, are made from chemically engineered compounds, offering superior performance and protection in extreme conditions. They are more expensive but highly recommended for high-performance engines or in harsh environments.

Viscosity Rating

The viscosity rating of an outboard engine gear oil is a crucial factor to consider. Viscosity refers to how thick or thin the oil is, which determines its ability to flow freely within the engine.

For most outboard engines, a multi-grade viscosity rating such as 10W-30 or 15W-40 is recommended. The first number indicates how well the oil flows at lower temperatures, while the second number represents its flow at higher temperatures.

A lower first number means better cold-weather performance, while a higher second number indicates better protection at high temperatures.

Brand Recommendations

There are various brands of outboard engine gear oils available in the market. However, it is always best to stick with reputable brands that have been tried and tested by other boaters.

Some popular brands include Mercury Marine Quicksilver Premium Plus 2-Cycle Outboard Oil, Yamalube 2M TC-W3 Outboard Mineral-Based Oil, and Mobil 1 Synthetic Gear Lube for Outboards.

Additional Features

When purchasing outboard engine gear oil, look for additional features such as anti-wear additives and corrosion inhibitors. These additives can provide extra protection against wear and tear as well as prevent rusting in saltwater environments.

It is also essential to ensure that the chosen gear oil meets or exceeds your engine manufacturer’s specifications.

Budget Considerations

While it may be tempting to opt for cheaper options when it comes to buying outboard engine gear oil, keep in mind that using low-quality or incorrect gear oil can lead to expensive repairs or even irreversible damage to your engine. Therefore, investing in high-quality gear oil can save you money in the long run.

In Conclusion

Choosing the right outboard engine gear oil requires careful consideration based on your boat’s specific needs and usage patterns. It is always best to consult with your boat’s manufacturer or a trusted mechanic before making a purchase decision. By following this guide, I am confident that you will be able to find an excellent quality outboard engine gear oil that will keep your boat running smoothly for years to come.

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Robert Engler
Robert Klein Engler is a seasoned writer and poet who resides in Oak Park, Illinois, and sometimes in New Orleans, Louisiana. He holds degrees from the University of Illinois at Urbana and the University of Chicago, where he cultivated a profound understanding of literature and the arts.

Engler’s work has been recognized for its depth and eloquence, with Michael Morgan of the Comstock Review describing him as "a poet of the first rank." Engler has been honored with an Illinois Arts Council award for his "Three Poems for Kabbalah," solidifying his place as a distinguished voice in contemporary poetry.

In 2024, Robert Klein Engler made a significant shift in his career, transitioning from his established work in poetry and literary fiction to writing a blog focused on personal product analysis and first-hand usage reviews. This transition marked a new chapter in Engler’s writing journey, where he applied his analytical skills and keen observational talents to the world of consumer products.

Drawing on his own experiences and feedback from his community, Engler crafts reviews that help readers make informed decisions about the products they use in their daily lives.