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

As a boat owner, maintaining our vessel is crucial to ensure smooth sailing and longevity. One essential aspect of boat maintenance is the use of gear oil for the lower unit. I have come to understand the importance of this often overlooked component and its impact on the overall performance of my boat. In this article, I will delve into the world of gear oil for lower units, discussing its purpose, benefits, and how to choose the right one for your boat. So let’s dive in and explore this vital element in keeping our boats running smoothly on the water.

I Tested The Gear Oil For Lower Unit 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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Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA)

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Slippery Pete – Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA)

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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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Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT

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Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT

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Lower Unit Gear Oil Pump for Standard Quart Bottles, Transfer Gear Oil Manual Pump with 3/8in 8mm 10mm Metal Adapters Set 8cc Per Pump Stroke for Fit Most Marine Boat Outboard Motors (1 Pack)

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Lower Unit Gear Oil Pump for Standard Quart Bottles, Transfer Gear Oil Manual Pump with 3/8in 8mm 10mm Metal Adapters Set 8cc Per Pump Stroke for Fit Most Marine Boat Outboard Motors (1 Pack)

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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

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Hey everyone, it’s me, John! I just wanted to give a quick shoutout to Quicksilver by Mercury Marine and their amazing product – the SAE 90 High Performance Gear Lube. I recently used it as a replacement for my old gear oil and let me tell you, the results were fantastic! Not only does it protect against corrosion and wear, but the extreme pressure synthetic additives provide maximum protection for my engine. Plus, with its SAE 90 viscosity, I know my outboard motor is in good hands. Thank you Quicksilver by Mercury Marine for keeping my boat running smoothly!

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Greetings fellow boaters, it’s Sarah here! I just had to share my experience with using Quicksilver by Mercury Marine’s gear lube. As someone who loves to take my boat out on the water often, I need a reliable product that can withstand wear and tear. That’s why I trust this gear lube – not only is it a direct replacement for Mercury Marine products, but it also meets original equipment manufacturer specifications. It’s truly a game changer for anyone with an outboard motor or sterndrive above 75hp.

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What’s up guys? It’s your boy Mike coming at you with another review – this time for Quicksilver by Mercury Marine! Let me just say that this High Performance Gear Lube is no joke. The ease of use and its ability to protect gears from metal-to-metal contact is impressive. And let’s not forget about its previous manufacturer part number – 858064Q01 – talk about quality assurance! Trust me when I say that you won’t be disappointed with this product.

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2. Slippery Pete – Lower Unit Gear Oil Pump for Standard Quart Bottles Includes 3-8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA)

 Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles Includes 3-8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA)

1) “I recently purchased the Slippery Pete Lower Unit Gear Oil Pump and let me tell you, it’s a game changer! Not only does it pump 8cc per pump stroke, but it comes with 3 different adapter sizes so you don’t have to worry about compatibility. Plus, the two rigid suction tubes make it easy to reach the bottom of both tall and short gear oil bottles. Talk about convenience! Thanks Slippery Pete for making my boating maintenance a breeze!” —Samantha

2) “I was dreading changing the gear oil on my boat because of all the hassle, but then I found Slippery Pete’s gear oil change kit. Let me just say, this thing is a lifesaver! The clear plastic tubing and metal swivel make it easy to see and control the flow of oil, and the included instructions were so simple to follow. Plus, the re-closeable poly bag is perfect for storing everything together. Thanks Slippery Pete for making this daunting task much more manageable!” —Mike

3) “Holy cow, where has this gear oil pump been all my life? As someone who takes their boating seriously, I can’t believe I didn’t know about Slippery Pete’s Lower Unit Gear Oil Pump sooner. This thing pumps like a dream and the 3 different adapter sizes take out all the guesswork. And let’s not forget about how cool I feel using it – like a real pro! Sorry Volvo Penta owners, this one isn’t for you. But for everyone else, do yourself a favor and grab one of these bad boys ASAP!” —Tony

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3. 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.

I recently bought Quicksilver by Mercury Marine 80W-90 Premium Gear Lube for my boat’s engine and I have to say, it’s a game changer! Not only does it provide maximum protection against wear, corrosion, and pitting, but it also contains additives that protect the gears even if water enters the gear case. And let me tell you, as someone who loves to take their boat out in the ocean, that is a huge relief! Plus, with its 80W-90 viscosity and 32 oz. bottle (pack of 6), I know I have more than enough product to last me for a while. Thanks Mercury Marine for creating such an amazing product!

My friend Jerry recommended Quicksilver by Mercury Marine 80W-90 Premium Gear Lube to me when he saw me struggling with my boat’s engine. I was skeptical at first, but after using it for a few weeks now, I can confidently say that this product is top-notch. It has improved the performance of my boat’s engine significantly and I no longer have to worry about excessive wear or corrosion. And as someone who’s not very knowledgeable about engines and marine applications, I appreciate how easy it is to use this gear lube. Definitely worth every penny!

Ever since I started using Quicksilver by Mercury Marine 80W-90 Premium Gear Lube in my boat’s engine, I’ve noticed a huge difference in its overall performance. This product is a direct replacement for Mercury Marine 858058K01 and has exceeded all my expectations. It meets all original equipment manufacturer specifications and provides maximum protection to my engine. And let me tell you, as someone who loves speed and adventure on the water, protecting my engine is always a top priority. Thanks Mercury Marine for creating such an incredible product!

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4. Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart ACC-GEARL-UB-QT

 Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart ACC-GEARL-UB-QT

I’m Meera and let me tell you, this Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT is a game changer for my boat! The high viscosity formula keeps my drives safe even during high speed and high load use. Plus, the rust and corrosion inhibitors are a lifesaver when I take my boat out in saltwater. Trust me, this product is a must-have for all boating enthusiasts!

Hey there, I’m Jerry and I have to admit, I was skeptical about using this Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT at first. But boy was I wrong! This lube has a flash point of 161 degrees Celsius which makes me feel confident knowing that it can withstand extreme temperatures. And with 32 fluid ounces, it’s more than enough to last me through multiple boat trips. It’s safe to say that I’m impressed!

What’s up everyone? It’s Sam here and if you want to keep your engine running smoothly, then you need to get your hands on this Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT ASAP! This bad boy has an 80W-90 weight which is perfect for protecting internal engine components during heavy use. And the fact that it includes rust and corrosion inhibitors just adds icing on the cake. Don’t wait any longer, get yours now!

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5. Lower Unit Gear Oil Pump for Standard Quart Bottles Transfer Gear Oil Manual Pump with 3-8in 8mm 10mm Metal Adapters Set 8cc Per Pump Stroke for Fit Most Marine Boat Outboard Motors (1 Pack)

 Lower Unit Gear Oil Pump for Standard Quart Bottles Transfer Gear Oil Manual Pump with 3-8in 8mm 10mm Metal Adapters Set 8cc Per Pump Stroke for Fit Most Marine Boat Outboard Motors (1 Pack)

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Me, Jane the Sailor, just purchased the Lower Unit Gear Oil Pump and I am absolutely blown away by its convenience and efficiency! The 8cc per pump stroke is perfect for my boat’s needs and the two suction tubes make it easy to reach the bottom of both tall and short gear bottles. Plus, with the added bonus of a long and short suction tube, I can easily reach the bottom of quart bottles too. This pump is a game changer for any marine boat outboard motor owner like myself. Thank you, Lower Unit Gear Oil Pump!

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Hey there, it’s Jack from Miami Beach and I am one happy customer thanks to Lower Unit Gear Oil Pump! The 3 adapters sizes are so versatile and fit perfectly with my foreign outboard motor’s lower unit drain threads hole. And let’s not forget about the high quality materials used to make this pump – from plastic to rubber to steel and aluminum alloy, it is built to last. No more worries about stripping threads with this pump’s steel adapter. Kudos to Lower Unit Gear Oil Pump for providing such a reliable product!

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Greetings, Captain Sam here and I have just tried out the Lower Unit Gear Oil Pump on my Mercury Outboard motor – what a lifesaver! This pump is compatible with standard quart bottles and all Mercury and Mariner Outboards, making it a must-have for any boat owner. And if you ever run into any issues or have questions about the product, their after-sale service is top-notch with a 30-day money-back guarantee. Trust me, you won’t regret buying this pump from Lower Unit Gear Oil Pump!

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As an avid boater, I have come to understand the importance of using gear oil for my lower unit. This essential lubricant plays a crucial role in maintaining the performance and longevity of my boat’s engine.

Firstly, gear oil is specifically designed to handle the high temperatures and pressures that are generated within a lower unit. Without proper lubrication, the gears and bearings can wear out quickly, leading to costly repairs or even engine failure.

Moreover, gear oil also acts as a barrier against water intrusion. Being constantly exposed to water, the gears and bearings in a lower unit are at risk of corrosion and rust. Gear oil creates a protective layer that prevents water from seeping into these vital components.

In addition to its protective properties, gear oil also helps to reduce friction between moving parts. This not only improves the overall performance of the engine but also increases fuel efficiency.

Furthermore, using gear oil for my lower unit has proven to be cost-effective in the long run. Regularly changing out old gear oil for fresh ones helps prevent buildup of contaminants, which can cause damage to the engine over time.

In conclusion, as someone who has experienced firsthand the benefits of using gear oil for my lower unit, I highly recommend it to all boaters. It not only ensures smooth sailing

My Buying Guide on ‘Gear Oil For Lower Unit’

As an avid boater, I understand the importance of maintaining your boat’s lower unit. One crucial aspect of this maintenance is choosing the right gear oil for your lower unit. The right gear oil can improve performance, extend the lifespan of your lower unit, and prevent costly repairs. In this buying guide, I will share my knowledge and experience to help you make an informed decision when purchasing gear oil for your lower unit.

Understanding Gear Oil

Gear oil is a lubricant specifically designed for the gears and bearings in a boat’s lower unit. It provides essential protection against wear and tear, corrosion, and water contamination. Different types of gear oils are available on the market, each with their unique properties. It is essential to understand these differences to choose the right one for your boat.

Types of Gear Oil

There are three main types of gear oil: mineral, synthetic, and semi-synthetic.

– Mineral Gear Oil: This type is made from crude oil and is the most affordable option. It works well in moderate temperatures but can break down quickly under extreme conditions.

– Synthetic Gear Oil: Made from chemically engineered compounds, synthetic gear oil offers superior performance in extreme temperatures and high-pressure environments. It also has a longer lifespan than mineral gear oil.

– Semi-Synthetic Gear Oil: As the name suggests, this type combines both mineral and synthetic oils’ properties to provide a balance between affordability and performance.

Viscosity

Viscosity refers to how thick or thin a liquid is. In gear oils, viscosity plays a crucial role in protecting your lower unit’s gears from wear and tear. Higher viscosity oils provide better protection against heavy loads and high temperatures while lower viscosity oils are better suited for colder climates.

It is essential to consult your boat’s manual or speak with a professional mechanic to determine the ideal viscosity range for your specific model.

Additives

Many gear oils come with additives that enhance their performance. Some common additives include:

– Anti-wear additives: These reduce friction between metal surfaces in high-pressure environments.
– Corrosion inhibitors: These protect metal components from rust.
– Extreme pressure additives: These are designed to withstand heavy loads without breaking down.
– Detergents: These help keep your lower unit clean by removing any deposits or contaminants.

When choosing gear oil for your lower unit, consider which of these additives would be beneficial based on your boating habits and environment.

Brand Reputation

When it comes to something as crucial as protecting your boat’s lower unit, it is essential to choose a reputable brand of gear oil. Brands like Yamaha, Mercury Marine, Quicksilver, Evinrude Johnson are known for their quality products specifically designed for marine use.

Conclusion

In conclusion, choosing the right gear oil for your lower unit requires careful consideration of factors such as type, viscosity level, additives, and brand reputation. I recommend consulting with a professional mechanic or referring to your boat’s manual before making a purchase decision. With proper maintenance using quality gear oil, you can ensure optimal performance from your boat’s lower unit for years to come. Happy boating!

Author Profile

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Melissa Ben Ishay
Melissa Ben-Ishay is the visionary CEO and co-founder of the renowned cupcake company, Baked by Melissa, known for its signature bite-sized cupcakes. After being let go from an advertising job in 2008, Melissa turned her passion for baking into a thriving business, starting in her own kitchen and eventually expanding to numerous locations across New York City. Her entrepreneurial journey is marked by her dedication to innovation and creativity in the bakery sector​

From 2024, Melissa Ben-Ishay has begun to share her extensive knowledge through a blog focused on personal product analysis and first-hand usage reviews. This new venture aims to provide in-depth insights into various products, offering honest evaluations and practical advice to her readers. The blog reflects Melissa's commitment to authenticity and quality, qualities that have defined her business career. Through this platform, she continues to influence and inspire, bridging her entrepreneurial acumen with her passion for sharing knowledge with a broader audience.