Complete Outdrives, Uppers and Lowers - SEI Replacement Outboards for Yamaha, Johnson / Evinrude

The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order

This SE304 Gear Case replaces most early style Johnson/Evinrude V-4 Lower Units from 1978-1998 with a 4-1/8 bullet diameter. The case has internal Water Screens and a pointed cavitation plate at the rear.

The unit does not include the upper drive-shaft. If your old unit has a one piece shaft you will need to purchase an upper drive-shaft. We use the newer style stub-shaft with a clip. If your upper shaft is not the newer style you will need to replace it. Our unit does not include a Water Pump. Our unit does not include the shift shaft. You will need to reuse your old one and adjust it. You may paint the unit to match your Outboard.

SE306 Uses the Ocean Pro style water intakes. Does not fit units older than 1978. The Bullet diameter is 4-3/4 inches. Will not replace Magnum or Lightning cases. Does not include Upper driveshaft. If your old unit has a one piece shaft you will need to purchase an upper driveshaft. We use the newer style stubshaft with a clip. If your upper shaft is not the newer style you will need to replace it. Our unit does not include a Water Pump. Our unit does not include the shift shaft. You will need to install your old one and adjust it. You will need to use a 1991 or newer prop thrust washer.
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order. You may paint the unit to match your Outboard.
Fits OMC-1-83-R-V-6-5005401

SE306 Uses the Ocean Pro style water intakes. Fits V4 Johnson/Evinrude with the 4-3/4 bullet diameter V6 case. Uses the Ocean Pro style water intakes. Does not include Upper driveshaft. If your old unit has a one piece shaft you will need to purchase an upper driveshaft. We use the newer style stubshaft with a clip. If your upper shaft is not the newer style you will need to replace it. Our unit does not include a Water Pump. Our unit does not include the shift shaft. You will need to install your old one and adjust it. You will need to use a 1991 or newer prop thrust washer.
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order. You may paint the unit to match your Outboard.
Fits OMC-2-25-R-V-6 With V-4-Ratio-0439982

Replaces most 200HP/225HP and some 250HP Yamaha 76 Degree V6 Counter Rotation Motors with a 1.81 Ratio
Replaces most 200HP/225HP Yamaha V6 4-Stroke Counter Rotation Motors with a 2.00 Ratio
For Counter Rotation only, do not use for Standard Rotation
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order. Replaces most later model Johnson V-4 Lower Units from 1995-2006 with a 4-1/8 bullet diameter. Has external water screens and the rear cavitation plate is flat. Does not include Upper driveshaft. If your old unit has a one piece shaft you will need to purchase an upper driveshaft. We use the newer style stubshaft with a clip. If your upper shaft is not the newer style you will need to replace it.
Our unit does not include a Water Pump. Our unit does not include the shift shaft. You will need to install your old one and adjust it. You may paint the unit to match your Outboard.

Replaces all Yamaha V-4 2-Stroke Standard Rotation Lower Units.
115HP and 130 HP only
Also fits 2000-2014 F115 4 stroke Standard Rotation models
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces F115 Yamaha gear cases on 4-Stroke Engines with 20 inch drive shaft.
(115HP 4-Stroke Only 2000-2014 Standard Rotation)
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces Yamaha gear cases on 4-Stroke Engines with 25 inch drive shaft.
(F115 115hp Standard Rotation 2000-2014 only)
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order

The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces Yamaha gear cases on V-4 2-Stroke Engines with 20 inch drive shaft.
(115HP and 130 HP only)
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order

Will not work on any 4-Stroke Engine applications.

Replaces the gear case on most Yamaha V-4 2-Stroke with 25 inch drive shaft.
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces most Yamaha 90 Degree V6 2-Stroke and some inline 4 cylinder 4-Stroke engines

The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces the gear case on most Yamaha 90 Degree V6 2.6 Liter
2-Stroke Engines with 20 inch drive shaft.


The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces gear case on most Yamaha 90 Degree V6 2.6 Liter 2-Stroke Engines.
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces most Yamaha 90 Degree V6 2.6 Liter 2-Stroke engines
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces most Yamaha 4-Stroke 150HP engines with a 20"" drive shaft.
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore. color may vary depending on product availability at time of order.

Replaces most Yamaha 4-Stroke 150HP engines with 25" drive shaft. The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.

Replaces most Yamaha 90 Degree V6 2-Stroke engines with a 1.86 Gear Ratio.

For Counter Rotation applications only (do not use for Standard Rotation).

The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order

This SE418 (90-418-B25F) is a Counter Rotation Gear Case. This is a Counter Rotation Gear Case replacement for the Yamaha FOUR Stroke 150HP Engine with a 1.86 Gear Ratio and a 25" Drive Shaft. The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order.
Fits Yamaha SE418-2-0 Counter Rotation 4 Stroke.

This SE418 (90-418-A25) is a Counter Rotation Gear Case. This is a Counter Rotation Gear Case replacement for the Yamaha 2 Stroke V6 2.6 Liter Engine with a 1.86 Gear Ratio a 25" Drive Shaft and a Counter (Left Hand)Rotation. The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order
Fits-Yamaha-SE418-1-86-Counter-64H-45300-22-8D

Replaces most Yamaha 76 Degree V6
The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order

Not designed for Yamaha F250 four stroke 250 HP motors