SEI Yamaha 150 HP Four-Stroke Lower Unit 2.00:1 25" Short Shift ShaftThese SEI aftermarket replacement lower units fit select Yamaha 150 HP four-stroke outboards. Both versions feature a 2.00:1 gear ratio, 25-inch driveshaft configuration, and short shift shaft. Choose the SE416 standard-rotation version for compatible F150 and VF150 applications or the SE418 counter-rotation version for compatible LF150 applications. Both are supplied in black and can be painted to match your engine.This item is subject to a 20% restocking fee.Year, serial number, and horsepower are required to process your order. Please contact us with this information after placing your order. Processing will be delayed until this information is received.Features 2.00:1 gear ratio; 25-inch driveshaft configuration; Short shift shaft; Standard-rotation and counter-rotation options; Black finish; paint to match your engine if desired; Available Applications Standard Rotation SE416 / 90-416-B25FS: For select Yamaha F150 and VF150 four-stroke applications.; Counter Rotation SE418 / 90-418-B25FS: For select Yamaha LF150 four-stroke applications.; Standard-Rotation Model References F150XCA: Listed 20172024 applications; F150XCA2: Listed 20212024 applications; F150XSA4: Listed 20232024 applications; VF150XA: Listed 20152024 applications; VF150XB: Listed 2024 application; Counter-Rotation Model References LF150XCA: Listed 20172022 applications; LF150XCA2: Listed 20212022 applications; Fitment and OrderingSelect the rotation that matches your engine and existing lower unit. Confirm your full engine model number, serial number, gear ratio, driveshaft length, and short shift shaft configuration against SEI's application guide before ordering. Horsepower and shaft length alone do not confirm compatibility.