SEI Marine Products, Inc.

SEI Marine Products, Inc. SEI is the largest supplier of aftermarket sterndrives and outboards in the world. Sterndrive Engineering, Inc.

The three year fault-free warranty covers any damage to the drive that requires it to be repaired or replaced including failures resulting from lack of oil, fishing line, impact, neglect, and other abuse. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiser®, Alpha One®, R, MR, Gen II and Bravo One® stern drives. MerCruiser®, Alpha One®, Gen II, R, MR and Bravo One® are

trademarks of the Brunswick Corporation. SEI has no affiliation with the Brunswick Corporation. Consequently, any warranties governing products manufactured and/or sold by Brunswick Corporation will not apply to products manufactured and/or sold by SEI, or to products damaged due to the operation of an SEI product. is not affiliated with Mercury®; Yamaha®; OMC® or their products. All reference to their trademarks and trade names are the property of the respective owners.

05/22/2026
Why pay more?SEI Sterndrives are built to perform—and priced to be affordable so that you can get back on the water.SE12...
04/21/2026

Why pay more?

SEI Sterndrives are built to perform—
and priced to be affordable so that you can get back on the water.

SE121 & SE128 Models
✔️ Bravo One® & Bravo Three® fitment
✔️ Dual water inlet design
✔️ 3-Year Fault-Free Warranty

Performance. Protection. Price.
No compromises.

Props fear rocks.Jet drives don’t.SEI Jet Drives & Parts are built for the abuse—river bottoms, sandbars, and everything...
04/18/2026

Props fear rocks.
Jet drives don’t.

SEI Jet Drives & Parts are built for the abuse—
river bottoms, sandbars, and everything in between.

With intake protection that shields your system where it matters most.

Now backed by a 1-Year No-Fault Warranty.

Run shallow. Run hard. Stay moving.

SEI's Replacement Sterndrives for Bravo are in stock and ready to ship. Comes complete with a 3-year, fault-free warrant...
01/22/2026

SEI's Replacement Sterndrives for Bravo are in stock and ready to ship. Comes complete with a 3-year, fault-free warranty.

12/23/2025

The skeleton crew at SEI will be keeping the doors open this holiday season from December 29th through the 31st. We will be closed New Year's Day and reopen January 2nd.

Making Memories—The Best part of the HolidaysIt's that time of year of where making memories and spending time with love...
12/20/2025

Making Memories—The Best part of the Holidays

It's that time of year of where making memories and spending time with loved ones is the best part of the holidays. The team at SEI wants to wish everyone a happy and jopyous holiday season.

Note that we will be closed December 25th and 26th.

10/31/2025

Happy Halloween from the SEI Marine Team

It's time to winterize! Look to SEI for everything you need to protect your boat from the harsh winter elements. Visit ...
09/30/2025

It's time to winterize! Look to SEI for everything you need to protect your boat from the harsh winter elements. Visit www.SEImarine.com today for easy shopping and fast shipping!

Happy Labor Day from our Crew to yours!
09/01/2025

Happy Labor Day from our Crew to yours!

Got Leaks? Check your seals and then visit SEI. We've got you covered for your sterndrive and lower units. Visit www.sho...
07/23/2025

Got Leaks? Check your seals and then visit SEI. We've got you covered for your sterndrive and lower units. Visit www.shopsei.net today for fast and reliable parts and technical support.

Address

115 S. Forest Lakes Boulevard
Oldsmar, FL
34677

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

08139257127

Website

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