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Your #1 Source for Lower Units

OEM Parts & Lower Units - Quality You Can Trust

The Most Reliable Rebuilder in the US


Priced at deep discounts to save you money All units include a full year warranty.

Over 2 Million OEM Parts Ready to Ship Today


Your professional choice for reliable, high-quality marine parts. Most orders ship the same day!

New and Used OEM Parts Available


Discover thousands of hard to find parts from Mercury, Mercruiser, Evinrude, Johnson, OMC and Volvo Penta.

Welcome To US Boatworks

Welcome to US Boatworks, where keeping you on the water is our #1 priority. We specialize in lower unit replacement. If your looking for rebuilt or remanufactured lower units, you’ve come to the right place! Our seasoned team members are experts in gearcase building and we take pride in getting you back on the water quickly and affordably. 

In all of Kansas City, there isn’t a friendlier or more knowledgeable staff than ours. We’re happy to help you with boat parts or boat repair you need. Check out our catalogs to find Mercury, Mercruiser, Mariner, Force, Evinrude, Johnson, OMC and Volvo parts. If you need help in making your selection, call or stop in—we’re always ready to help!

We are family-owned and operated and conveniently located in Kansas City, KS. US Boatworks provides you with the latest and best boat parts and Mercury Motors to make your time on the lake more enjoyable. By having one of the largest boat part inventories in the US, we can help get you back on the water quickly. We do this by avoiding having to wait for parts to ship from the manufacturer. Choose US Boatworks & find comfort knowing you will have a great day on the lake.

We know individuality is important, which is why we pay close attention to the interests of each customer. From the minute you walk through the door, meeting your needs is our top priority. Founded not only on excellent customer service, but also on the principles of hard work and a focused attitude, US Boatworks has a long list of satisfied customers. Call or stop by; you’ll be glad you did.

Why Choose US Boatworks

25% OFF

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


Online orders of $100 or more ship for free when you select USPS. Exclusions apply.


Most orders placed by 1 pm cst ship the same day! Call us for Next Day Air Shipping.


Over 40 years Replacement Drive business. We know your motor inside and out.

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Latest Blogs

2024 Mercury Marine Extended Warranty Promo

Mercury’s FREE 5 Year Warranty

Announcing Mercury Marine’s latest outboard motor repower promotion. Receive 2 additional years factory backed warranty for a total of 5 years when you purchase an outboard motor before August 31, 2024. Our in stock motors are shown below but don’t

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175hp FS LoweRetreat230 Freshwater 2017 Lifestyle 20 2

Boating Safety

Hitting the Water Safely: National Safe Boating Week 2024 Summer is just around the corner, and for many that means spending quality time on the water. But before you get out there, take a moment to brush up on your

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