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The Most Reliable Rebuilder in the US

LOWER UNITS

Priced at deep discounts to save you money All units include a full year warranty.
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Over 2 Million OEM Parts Ready to Ship Today

PARTS & ACCESSORIES

Your professional choice for reliable, high-quality marine parts. Most orders ship the same day!
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New and Used OEM Parts Available

HARD TO FIND PARTS

Discover thousands of hard to find parts from Mercury, Mercruiser, Evinrude, Johnson, OMC and Volvo Penta.
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SHOP ALL OF OUR BRANDS:

LundWC-25hp-Fishing-274

US Boatworks stocks over 2 million new and used OEM boat parts to keep you out on the water longer. When you place your boat parts order online, save up to 25% off retail prices. Use our parts finder to view engine drawings to find the manufacturer part number you need.  Select that part and place directly in your shopping cart. Online discount marine parts inventory with microfiche look up for Mercury , Evinrude, Johnson, Mariner, Force, OMC, Mercruiser and Volvo-Penta.

At US Boatworks, we want to see you back out on the water. One of the ways we do so is by stocking thousands of NLA, new old stock boat parts. If you are looking for hard to find, old boat parts, US Boatworks is your solution. You will need to contact us if your boat part has been deemed “NLA” because many of our NOS parts are not available in our online store. Call, text or email us for assistance. We are always happy to help.

Another way we keep you out on the water is by offering replacement lower units and sterndrive gearcases. Choosing the right replacement Lower Unit for your needs is very important and we are here to help. No matter which gearcase you choose, you can feel comfortable knowing US Boatworks will take excellent care of you. We have been in the Replacement Drive business for over 37 years and know your motor inside and out. Our personalized service team will get your unit to you with the exact specifications you need at great pricing. Call us now or check out our gearcases ready to ship now.

Most online orders ship for $4.95 when you use our coupon code.

Visit our online parts store to buy high-quality genuine OEM boat parts at prices up to 25% below retail.

Fast shipping. Most orders placed by 1 pm cst ship the same day!

Over 37 years Replacement Drive business. We know your motor inside and out.

Picture of 859399T13 Mercury Lower Unit
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859399T13 Mercury Lower Unit Back in Stock!

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,

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9011G92 Mercury Bigfoot Lower Unit 30-50 HP
Lower Units
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Just Dropped – Mercury Bigfoot Lower Unit

US Boatworks 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

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btracy

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

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