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SEI Marine Products Lower Unit Gearcases

SEI makes a new replacement lower unit gearcase for Johnson, Evinrude, Mercury and Yamaha outboard motors. They build a complete MerCruiser outdrive as well as lower gearcases. AFFORDABLE PRICING plus the piece of mind of a THREE-YEAR FAULT-FREE WARRANTY makes SEI the clear choice for many boaters.

Grab your engine model and serial number and get in touch with us here at MarineEngine.com. We're happy to help order the correct replacement unit to get you back on the water.

Johnson Evinrude Lower Units

Johnson Evinrude Gearcases

Mercury Outbard Lower Units

Mercury Outboard Gearcases

Yamaha Outboard Lower Units

Yamaha Outboard Gearcases

MerCruiser Sterndrive Lower Units

MerCruiser Sterndrives and Gearcases