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Changing Lower Unit Gear Lube in a Mercury Outboard

QuickSilver Gear Lube

Lower Unit Gear Lube Change in a Mercury Outboard Maintaining your Mercury outboard lower unit provides a peace of mind knowing that your boat’s motor will function efficiently when out for a day on the water. Mercury lower unit lube changes are an important part of maintaining an outboard motor. Changing the lower unit oil […]

How to change oil for a Mercury Outboard

Watch this video learn how to change your outboard engine oil.
Mercury Marine recommends that you change your oil at least every 100 & 300 hours. Of course, change the oil more frequently as needed.

Fishing Gear Checklist

fishing gear checklist

Struggling to remember all the gear you need to bring on your next fishing outing? We have you covered with this handy Fishing Gear Checklist. Here is a rundown on all the fishing gear you need: Additional fishing gear items to consider: If you are taking your boat out to fish, check out our Outboard […]

Outboard Maintenance Schedule

Mercury Oil Change Kit

So you haven’t kept up on your outboard maintenance?  Perhaps you were not aware that maintenance is required or you have no idea where you stored the owners manual to dig into the details. If you need some tips for outboard maintenance, you came to the right place.   Regular boat engine maintenance is essential […]

Do I need to replace my boat water pump?

Mercury Quicksilver Impeller

Why is a water pump important? Outboard water pumps and sterndrive water pumps are very important to your engine because they circulate water through the engine, keeping it cool to prevent overheating. Find tips on replacing your water pump for outboard motors below. Why is it important change an outboard water pump? Since a water pump […]

The Volvo SX-M Upper

Volvo SX M Upper

Our product highlight for this week is the popular Remanufactured Volvo-Penta SX-M Upper Gear Case from US Boatworks.  We offer the SX-M in two popular tooth counts, the 22/23 and the 21/26.  Within the 22/23 Upper, you can choose from five different gear ratios.  Those are 1.43, 1.51, 1.60, 1.66 and 1.85.  As for the […]

How to Get the Best Deal on Outboard Motor

merc 5 warranty

It’s no secret that for the past few years, new boats and new outboard motors have been hard to come by. Supply chain issues and a huge surge in demand to be outdoors created a massive backlog with outboard manufacturers. Of course as demand surges and supply shrinks, prices go up. So now that most […]

Now In Stock- Mercury Outboard Motors

40hp Mercury Outboard with Tiller

9.9 Outboard Motors for Sale It’s been an exciting week at US Boatworks. We have 8 new 2023 Mercury Outboards on the showroom floor. Four of these shiny new Mercury motors for sale have 9.9 horse power and offer several different options such as electric start, tiller handle, long or short shaft and Command Thrust. Command Thrust […]

The Truth About Replacement Gearcases #5

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The Best Gearcase Replacement Welcome to part 5 of Gearcase Education.  The previous articles have reviewed common gearcase terminology and discussed the three ways you can replace your lower unit.  Those were: So now you have the knowledge and can decide for yourself what unit is best for you.   Whatever you do, if you […]

The Truth About Replacement Gearcases #4

Rebuilt Volvo Lower DP-SA #3842844

Quality Remanufactured Lower Units Welcome to part 4 of our gearcase education course. In the previous articles, we reviewed both the OEM Lower Unit and the Non-OEM Lower Unit. In this article, we have a frank discussion about the rebuilt gearcase. So let’s get to it. A rebuilt or remanufactured unit takes the outer shell […]

The Truth About Gearcase Replacement #3

Mercury OEM Lower Unit 859399T14

The Case for a NEW OEM Gearcase Welcome to part 3 of our Gearcase Education Course. In the previous article, we discussed New Non-OEM Gearcases which tend to be inferior in quality but can save you money in the short term. Next up on our lower unit tour is the new OEM (original equipment manufacturer) […]

The Truth About Gearcase Replacement #2

The Case for Non-OEM Gearcases In my first article we reviewed the basic components of a gearcase to give us a good understanding of what goes into your unit. So in this article, we start with a look at one of the gearcase replacement choices – the Non-OEM Gearcase. You may have been through this already, […]

The Truth About Gearcase Replacement

Inside components of Lower Unit Gearcase

Gearcase Replacement Course Thanks for checking out my crash course on REPLACEMENT GEARCASES. My name is Mike Tracy, the owner and founder of US Boatworks. We are a company on a mission to help boaters select the best replacement gearcase available. My goal for this course is to provide you with all the information needed […]

The Problems with Lower Unit Replacement

Overwhelmed with lower unit replacement options? Not sure who you can trust? Need help with your insurance claim? Watch this lower unit replacement video for a run down of your lower unit options. Learn the pros and cons of each choice. https://youtu.be/YfC4h6IenyY View Rebuilt Units View Aftermarket Units View OEM Units US Boatworks – Keeping […]

859399T13 Mercury Lower Unit Back in Stock!

Picture of 859399T13 Mercury Lower Unit

After many months of waiting, the Mercury Marine 1623-859399T13 OEM Lower Unit is back in stock. There were only a few made during the last production so this won’t last long. The 859399T13 Mercury Outboard Lower Unit fits V6 / 6-Cylinder motors with 200 hp, 225 hp or 250hp, 3.0 liter, long shaft which measures as […]

We Pay Cash for Lower Unit Cores

We buy Lower Unit Cores The busy summer season is winding down and we are already looking ahead to next year.  As one of the top remanufacturers of lower units in the US, we spend a good chunk of the winter months rebuilding gear cases so they are ready to ship out in the spring.  In […]

Just Dropped – Mercury Bigfoot Lower Unit

9011G92 Mercury Bigfoot Lower Unit 30-50 HP

USBoatworks now carries the hard to find Mercury 30-50 HP Bigfoot lower unit. This lower fits Mercury Outboard Motors with Bigfoot Lower Units. It replaces OEM # 1667-9011G92. There are many reasons to purchase a rebuilt lower unit over buying new or aftermarket units.   Those reasons are: -Units are priced at deep discounts to save […]

The Challenge with Hard to find, NLA Parts

If you own an older boat motor you may find it challenging to get replacement boat parts for necessary repairs.  Most boat dealers do not have the time or the warehouse space to stock slower moving, older outboard or sterndrive parts.  To make matters worse, manufacturers only produce replacement parts for a period of time […]