Engine_Fuel & Props

SEI SE308 Johnson Evinrude Counter-Rotation Lower Unit – 1.83:1 The SEI 90-308-B SE308 is an aftermarket replacement lower unit for select Johnson and Evinrude outboards requiring counter rotation...

SEI 90-403 Jet Drive for Yamaha 50–60 HP Four-Stroke Outboards – 16T The SEI 90-403 is an aftermarket jet drive for select Yamaha 50 and 60 HP four-stroke outboards with a 20" shaft and 16-tooth...

SEI 90-901 Jet Drive for Tohatsu 40–60 HP Four-Stroke Outboards The SEI 90-901 is an aftermarket jet drive for compatible Tohatsu 40–60 HP four-stroke outboards from 2014 and newer. It fits...

SEI 9F-116 Complete Transom Assembly for MerCruiser Alpha One Gen II The SEI 9F-116 Complete Transom Assembly is a new aftermarket replacement for MerCruiser Alpha One Gen II applications from 1991...

SEI 9F-121 Complete Transom Assembly for MerCruiser Bravo I, II & III The SEI 9F-121 Complete Transom Assembly is an aftermarket replacement for compatible MerCruiser Bravo I, Bravo II, and Bravo...

SEI SE117 OMC Cobra Counter-Rotation Lower Unit The SEI SE117 is an aftermarket replacement lower unit for select 1986–1993 OMC Cobra sterndrives. Designed for twin-engine applications requiring...

SEI SE128 Lower Unit for MerCruiser Bravo Three The SEI SE128 Lower Unit is an aftermarket replacement for compatible MerCruiser Bravo Three sterndrives in applications up to 425 horsepower. Four...

SEI SE205 Lower Unit for Mercury DFI Outboards – 2.07:1 Ratio The SEI SE205 is an aftermarket replacement lower unit for compatible Mercury DFI (Direct Fuel Injection) outboards requiring a 2.07:1...

SEI SE205 Mercury Four-Stroke BigFoot Lower Unit – 2.33:1, 20" Shaft The SEI SE205 is an aftermarket replacement lower unit for select Mercury four-stroke BigFoot outboards. Both versions feature a...

SEI SE205 Mercury Outboard Lower Unit – 2.33:1, 25" Shaft The SEI SE205 is an aftermarket replacement lower unit for select Mercury outboards. Each version features a 2.33:1 gear ratio and a 25"...

SEI SE216 Lower Unit – 1.62:1 – Alpha Driveshaft The SEI 90-216-BS SE216 is an aftermarket replacement lower unit featuring a 1.62:1 gear ratio and Alpha driveshaft configuration. This version...

SEI SE216 Lower Unit – 1.62:1 – Alpha Driveshaft The SEI 90-216-BS SE216 is an aftermarket replacement lower unit featuring a 1.62:1 gear ratio and Alpha driveshaft configuration. Installation...

SEI SE218 Lower Unit for Mercury 3.0L – Counter Rotation, Stub Shaft The SEI SE218 is an aftermarket replacement lower unit for compatible Mercury 3.0L counter-rotation outboards. These stub-shaft...

SEI SE221 Lower Unit for Mercury 3.0L V6 2-Stroke – 1.75:1 Ratio The SEI SE221 is an aftermarket replacement lower unit for select Mercury 3.0L V6 two-stroke outboards in 200–300 HP applications...

SEI SE221 Lower Unit for Mercury Verado – Standard Rotation The SEI SE221 is an aftermarket replacement lower unit for select Mercury Verado inline four-cylinder and inline six-cylinder four-stroke...

SEI SE228 Mercury Counter-Rotation Lower Unit – 1.85:1 – 25" The SEI 90-228-B25F SE228 is an aftermarket counter-rotation replacement lower unit for select 200–275 HP 2.6L inline-six four-stroke...

SEI SE228 Lower Unit for Mercury Verado – Counter Rotation The SEI SE228 is an aftermarket replacement lower unit for select Mercury Verado inline four-cylinder and inline six-cylinder four-stroke...

SEI SE228 Mercury 3.0L V6 Counter-Rotating Lower Unit – 1.75:1 The SEI SE228 is an aftermarket counter-rotating replacement lower unit for select Mercury 3.0L V6 two-stroke outboards rated from...

SEI SE316 Johnson Evinrude Magnum Lower Unit – 1.85:1 The SEI 90-316-A SE316 is an aftermarket replacement lower unit for select Johnson and Evinrude outboards equipped with Magnum or Magnum II...

SEI SE318 Johnson Evinrude Magnum Counter-Rotation Lower Unit – 1.85:1 The SEI 90-318-A SE318 is an aftermarket counter-rotation replacement lower unit for select Johnson and Evinrude outboards...