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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 Yamaha 150 HP Four-Stroke Lower Unit – 2.00:1 – 25" Short Shift Shaft
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- SKU:
- S-E-90-41
$1,545.00
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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 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 2017–2024 applications
- F150XCA2: Listed 2021–2024 applications
- F150XSA4: Listed 2023–2024 applications
- VF150XA: Listed 2015–2024 applications
- VF150XB: Listed 2024 application
Counter-Rotation Model References
- LF150XCA: Listed 2017–2022 applications
- LF150XCA2: Listed 2021–2022 applications
Fitment and Ordering
Select 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.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
SEI Yamaha 150 HP Four-Stroke Lower Unit – 2.00:1 – 25" Short Shift Shaft Specs
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