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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 discount boat and marine engine parts online, 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.

USBOATWORKS

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

COUPON CODE

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

Free Shipping

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

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

Changing Lower Unit Gear Lube in a Mercury Outboard

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.

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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

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