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Yamaha Aftermarket Lower Unit – Replaces 75–100HP 2/4 Stroke – 2.0 & 2.3 Gear Ratios – 18 Spline – 20″ & 25″ Shafts – SEI 90-404
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SEI Brand New Yamaha 75–100HP 2/4-Stroke (1984–2017) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 20″ & 25″ Shafts – 2.0 & 2.3 Gear Ratios – 18 Spline – 3-Year Warranty

SKU: ST-90-404

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(26)
SEI
Original price was: $1,330.89.Current price is: $1,199.00.
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What Is a Lower Unit
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SEI Brand New Yamaha F200–F300 4-Stroke (2014–2021) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 30″ Shaft – 1.75 Gear Ratio – 3-Year Warranty

SKU: ST-90-423-B30F

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SEI
Original price was: $1,921.90.Current price is: $1,699.00.
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Yamaha Aftermarket Lower Unit – Replaces 115–130HP 4 Stroke – Fits 20″ & 25″ Shafts – SEI 90-405
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SEI Brand New Yamaha 115–130HP 2/4-Stroke (1984–2014) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 20″ & 25″ Shafts – 3-Year Warranty

SKU: ST-90-405

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(28)
SEI
Original price was: $1,330.89.Current price is: $1,199.00.
-10%
Yamaha Aftermarket Lower Unit – Replaces 115–130HP 4 Stroke – Fits 20″ & 25″ Shafts – SEI 90-405
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SEI Brand New Yamaha 150–200HP 2/4-Stroke (1984–2024) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 20″ & 25″ Shafts – 3-Year Warranty

SKU: ST-90-416

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(14)
SEI
Original price was: $1,330.89.Current price is: $1,199.00.
-11%
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SEI Brand New Yamaha 150–200HP 2/4-Stroke (1990–2024) Replacement Lower Unit – Aftermarket – Counter Rotation – Fits 25″ Shaft – 3-Year Warranty

SKU: ST-90-418

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(13)
SEI
Original price was: $1,572.25.Current price is: $1,399.00.
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Yamaha Aftermarket Lower Unit – Replaces 115–130HP 4 Stroke – Fits 20″ & 25″ Shafts – SEI 90-405
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Select options This product has multiple variants. The options may be chosen on the product page

SEI Brand New Yamaha 200–250HP V6 76° (1990–2019) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 20″, 25″ & 30″ Shafts – 3-Year Warranty

SKU: ST-90-421

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(8)
SEI
Original price was: $1,330.89.Current price is: $1,199.00.
-10%
Yamaha Aftermarket Lower Unit – Replaces 115–130HP 4 Stroke – Fits 20″ & 25″ Shafts – SEI 90-405
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Add to wishlist
Select options This product has multiple variants. The options may be chosen on the product page

SEI Brand New Yamaha 200–250HP 2/4-Stroke (1990–2019) Replacement Lower Unit – Aftermarket – Counter Rotation – Fits 25″ & 30″ Shafts – 3-Year Warranty

SKU: ST-90-428

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(25)
SEI
Original price was: $1,552.89.Current price is: $1,399.00.
-11%
Yamaha 250HP 4-Stroke (2005–2018)
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SEI Brand New Yamaha 250HP 4-Stroke (2005–2018) Replacement Lower Unit – Aftermarket – Standard Rotation – Fits 20″, 25″ & 30″ Shafts – 3-Year Warranty

SKU: ST-90-422

In stock

(9)
SEI
Original price was: $1,572.25.Current price is: $1,399.00.
-12%
Yamaha 250HP 4-Stroke (2005–2018)
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SEI Brand New Yamaha 250HP 4-Stroke (2005–2018) Replacement Lower Unit – Aftermarket – Counter Rotation – Fits 25″ & 30″ Shafts – 2.00 Gear Ratio – 3-Year Warranty

SKU: ST-90-429

In stock

(18)
SEI
Original price was: $1,921.90.Current price is: $1,699.00.