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    • Mercruiser® Sterndrive
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    Mercruiser®

    Alpha One® Gen I
    (1972-1990)
    Alpha One® Gen II
    (1991-Present)
    Bravo®

    OMC Stringer/Cobra®

    Stringer Cobra® (1986-1993) Cobra Joint Venture (94-98) Transom Parts

    Volvo SX

    Upper Parts Lower Parts Transom Parts

    Mercury/Mariner/Force OB

    Complete Lowers Gearcase Housing Shafts Gears

    Yamaha Outboards

    Complete Lowers Gearcase Housing Shafts Gears

    Johnson / Evinrude

    Complete Lowers Upper Driveshafts Gearcase Housing Shafts

    Tools/Steering Kits/ Manuals/Lubes

    Steering Seal Kits Tools & Equipment Gear Lube Scan Tool

    Electrical

    Starting Motors Alternators Power Trim Motors/Pumps Hatch Lifters

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    Mon-Fri, 8am-5pm EST
    Winter (Nov-Feb)
    Mon-Thu, 8am-5pm EST
    Fridays 8am-12pm EST
    tel: 1.813.925.7127
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    Sterndrive Engineering (SEI) is the largest supplier of aftermarket sterndrives and our own line of outboards in the world. The company makes replacement sterndrives for MerCruiser's® Alpha One® and Gen II stern drives and replacement outboard lower units for Mercury®, Johnson/Evinrude® and Yamaha®. Sterndrive Engineering's Outdrives are not remanufactured, they are entirely new. The SEI drives are made of parts that are completely compatible and interchangeable with the OEM.

    SEI's drives come standard with a three-year, fault-free warranty. This means that the unit is covered for any failure that requires the drive to be repaired or replaced. Run it without lubrication, crash into a stump, suck up some fishing line, it does not matter, the SEI drive is always covered. SEI believes this warranty is one of the best warranties ever offered for a stern drive or a outboard lower unit. Peace of mind while on the water is important, and SEI goes the extra distance to make sure that our products perform.

    SEI has done extensive testing on all of the parts of the drives including the gears, shafts, bearings, and other wear parts to confirm performance and durability. SEI operates one of the only research lakes in the world dedicated to the testing of marine propulsion systems. The research center has a 40-acre lake with a stationary dock that allows for around-the-clock endurance testing of parts, such as gears, shafts, and bearings.

    SEI has the best prices by far for replacement drives compatible with MerCruiser's® Alpha One®, Gen II, Mercury®, Johnson/Evinrude® and Yamaha®. Often the company is asked 'How do we do it?'. SEI buys its parts directly from manufacturers and passes the savings on to the customer. The marine industry is notorious for multiple layers of distribution which adds cost to the end user. By avoiding the middleman, SEI is able to offer a quality drives at a fraction of the price offered by others.

    SEI also offers a complete line of hydraulic parts compatible with MerCruiser® Sterndrives. The products offered include hydraulic pumps, trim cylinders, hoses, fittings, and other accessories. SEI also offers a gimble housing repair kit.

    SEI's mission is to make owning, operating, and maintaining a sterndrive or outboard lower unit more affordable. Thanks for your interest in SEI.

    Information
    Boat Props Boat Transom Repair Evinrude Gearcase Johnson Lower Units Marine Parts Marine Supplies Mercruiser Cylinder Mercruiser Hydraulics Mercruiser Manual Mercury OMC Outboard Motors Outdrives Yamaha Unboxing Contest
    Mercruiser
    Alpha One® Gen I
    (1972-1990)
    Alpha One® Gen II
    (1991-Present)
    Bravo®
    OMC Stringer/Cobra®
    Stringer Cobra® (1986-1993) Cobra Joint Venture (94-98) Transom Parts Cobra® Replacement Part Kits Solas Props for Cobra® Clymer Manuals for Cobra®
    Mercury/Mariner/Force
    Complete Lowers Gearcase Housing Shafts Gears Bearings Bearing Carrier Gasket & Seals Shims Misc. Water Pump Kits Propellers Manuals Anodes Power Trim
    Yamaha
    Complete Lowers Gearcase Housing Shafts Gears Bearings Bearing Carrier Gaskets & Seals Shims Misc. Water Pump Kits Propellers Manuals Anodes
    Johnson/Evinrude
    Complete Lowers Upper Driveshafts Gearcase Housing Shafts Gears Bearings Bearing Carrier Gaskets & Seals Shims Misc. Water Pump Kits Propellers Manuals Anodes
    Volvo SX
    Upper Parts Lower Parts Transom Parts
    Clymer Manuals
    Steering Seal Kits Tools & Equipment Gear Lube Scan Tool Manuals
    Solas Propellers
    Mercruiser Mercury/Mariner Johnson/Evinrude Yamaha OMC-Sterndrive Suzuki Tohatsu & Nissan Honda Volvo Penta Yanmar RUBEX Hub Kits
    Company
    Forum About SEI Become a Dealer Technical Support Buyer's Guide Contact Warranty Claim
    Customer Reviews

    We Gladly Accept

    ©Copyright . Sterndrive Engineering Inc. All Rights Reserved.

    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. Sterndrive Engineering, Inc. (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. Sterndrive Engineering, Inc. 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.

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