Two people on a white and black Caymas fishing boat cruising on a lake, surrounded by trees and mountains.

Four Generations of Customers. One Family-Owned Shop.

Boat sales and service in Chamberlain, SD — same family, same shop, since 1984.
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★★★★★ 4.7/5 (Google Reviews) · 40+ Years in Business · Authorized Dealer

Lund
Premier
Bentley: The Best Value in Boating
Thunder Jet
Caymas Boats
Two people fishing from a Caymas boat on a lake with mountains in the background

Fishing Boats

Man driving a Bentley boat on a lake with family in the background

Pontoons & Tritoons

Premier Pontoon boat on a trailer with trees in the background

Boat Rentals

Boat with Mercury outboard motor on a lake surrounded by trees

Outboard Motors

Mercury Marine

The Power to Go. The Reliability to Return.

Mercury outboards are built for both — the power to take you further and the reliability to bring you home. Trip after trip, season after season.

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Our Services

We Don't Just Sell Boats. We Keep Them Running.

Our shop handles everything from rigging and electronics to engine overhauls, winterization, and shrink wrap. And as an authorized Mercury service dealer, we're equipped to handle your engine the right way — not just get you out the door.

We'll even come pick up your boat from storage when it's time for service. Just call us.

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Mercury outboard motor on a boat moving through water with trees in the background
Boat dashboard with steering wheel and Lowrance navigation device.

What Our Customers Say About Us

Brands We Carry

Mercury
Humminbird
Minn Kota
Garmin
Lowrance
Interstate Batteries
Beatdown Outdoors
Norsk Lithium

Some of the Best Memories Are Made on the Water

The first fish. The late-night pontoon rides. The moments you didn't know you'd remember forever. A good boat makes more of them happen. Swenson Bros. Marine has been helping South Dakota families get on the water since 1984 — come find the one that's right for yours.
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