Engine_Fuel & Props

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...

SEI SE404 Yamaha Two-Stroke Lower Unit – 2.00:1 – 20" Shaft The SEI 90-404-A20 SE404 is an aftermarket replacement lower unit for select Yamaha two-stroke outboards. Featuring a 2.00:1 gear ratio,...

SEI SE404 Lower Unit for Yamaha 4-Stroke Outboards – 2.3:1 Ratio The SEI SE404 is an aftermarket replacement lower unit for select Yamaha four-stroke outboards requiring a 2.3:1 gear ratio...

SEI SE405 Yamaha F115 Lower Unit – 2.15:1 – 25" Shaft The SEI 90-405-B25F SE405 is an aftermarket replacement lower unit for select 2000–2014 Yamaha F115 115 HP four-stroke outboards. Featuring...

SEI SE416 Lower Unit for Yamaha F175 & F200 4-Cylinder – 1.86:1 Ratio The SEI SE416 is an aftermarket replacement lower unit for select Yamaha F175 and F200 inline four-cylinder outboards. Featuring...

SEI SE418 Yamaha Counter-Rotating Lower Unit – 25" Shaft The SEI SE418 is an aftermarket counter-rotating replacement lower unit for select Yamaha four-stroke outboards. Both versions have a 25"...

SEI SE421 Yamaha Four-Stroke Lower Unit – 2.00:1 – 30" Shaft The SEI 90-421-B30F SE421 is an aftermarket replacement lower unit for select Yamaha 200–225 HP V6 four-stroke outboards. Featuring...

SEI SE422 Lower Unit for Yamaha F225 & F250 – Standard Rotation, 2.00:1 The SEI SE422 is an aftermarket replacement lower unit for select Yamaha F225 and F250 outboards. Featuring a 2.00:1 gear...

SEI SE423 Yamaha Outboard Lower Unit – 1.75:1 Ratio The SEI SE423 is an aftermarket replacement lower unit for select Yamaha outboards. Available in 25" and 30" shaft configurations, both versions...

SEI SE428 Yamaha Counter-Rotation Lower Unit – 30" Shaft The SEI SE428 is an aftermarket counter-rotation replacement lower unit for select Yamaha V6 outboards with a 30-inch driveshaft...

SEI SE429 Yamaha LF250 Counter-Rotating Lower Unit – 2.00:1 The SEI SE429 is an aftermarket counter-rotating replacement lower unit for select Yamaha LF250 outboards. Featuring a 2.00:1 gear ratio...

SEI SE430 Yamaha LF250/LF300 Counter-Rotation Lower Unit – 1.75:1 – 30" Shaft The SEI 90-430-B30F SE430 is an aftermarket counter-rotation replacement lower unit for select 2010–2021 Yamaha LF250...

SEI SE521 Lower Unit for Suzuki DF200, DF225 & DF250 – Standard Rotation The SEI SE521 is an aftermarket replacement lower unit for select Suzuki DF200, DF225, and DF250 outboards. Available for 25"...

SEI SE528 Lower Unit for Suzuki DF200, DF225 & DF250 – Counter Rotation The SEI SE528 is an aftermarket replacement lower unit for select counter-rotation Suzuki DF200, DF225, and DF250 outboards...

SEI Yamaha 150 HP Four-Stroke Lower Unit – 2.00:1 – 25" Short Shift Shaft These SEI aftermarket replacement lower units fit select Yamaha 150 HP four-stroke outboards. Both versions feature a 2.00:1...

Sierra 18-9421CAT-7 Semi Synthetic Catalyst Marine Oil

Sierra STT3231R Edge Mount 12" x 12" Electric Trim Tab Kit The Sierra Edge Mount Trim Tab feature built in electronics with position sensing and CAN communication. Constructed of 12 gauge 304...