SEI Yamaha Outboard Replacement Lower Unit Gearcase
Grab your engine model 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.
SE404 Yamaha Some 2-stroke and 4-stroke 75-100 HP
SE405 Yamaha V-4 2-Stroke and some 4-Stroke
SE416 Yamaha 90-degree block V-6 & some Inline 4 Cyl
SE418 Yamaha 90-degree block V-6 Counter Rotation
SE421 Yamaha 76-degree block V-6
SE428 Yamaha 76-degree block V-6 Counter Rotation
SE422 Yamaha Some F250 2.0 Ratio
SE429 Yamaha some LF250 2.0 Ratio Counter Rotation
SE423 Yamaha Some F200-F300 V-6 4.2L 1.75 Ratio
