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Yamaha Replacement Lower Unit | 2.00 | 25" | 4 Stroke | 90-421-B25F
SEI Marine
MPN : 90-421-B25F
Overview & Technical Specs
| Product Overview | |
|---|---|
| Fits | Yamaha |
| Unit Type | Lower Unit |
| Warranty | 3 Year Fault Free Warranty |
| Weight | 65.0 lb |
| Item Condition | New |
| Technical Specifications | |
| Combustion | 4 Stroke |
| Gear Ratio | 2 |
| Rotation | RH |
| Shaft Length | 25" |
Increments of 1
Minimum of 1
Maximum of
10Low stock
10In stock, ready to ship
Sale price
$1,195.00 USD
-100%
Regular price
Regular price
$1,195.00 USD
Unit price
per
Yamaha Replacement Lower Unit | 2.00 | 25" | 4 Stroke | 90-421-B25F
Sale price
$1,195.00 USD
Regular price
Regular price
$1,195.00 USD
Unit price
per
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Description
SE421 Replacement Lower Unit for Yamaha® 76° V6
Get back on the water fast. The SE421 is a cost-effective, OEM-fit alternative for most Yamaha 76° V6 outboards. It arrives fully assembled and ready to install, built to factory-level specifications for smooth shifting, dependable performance, and long service life.
Highlights
- Direct-fit replacement for most Yamaha 76° V6 lower units (SE421 series coverage)
- Not compatible with F250 — does not fit Yamaha F250 4-Stroke 250 HP models
- Pre-assembled gearcase with water pump and internal components installed
- OEM-level engineering — precision-machined gears, shafts, and bearings
- Durable finish — painted black; can be refinished to match engine color
- Reliability tested for smooth operation and long service life
Compatibility Note: This unit does not fit Yamaha F250 4-Stroke 250 HP models.
Application
Designed as a direct replacement for Yamaha 76° V6 outboard lower units covered by the SE421 series. Excludes Yamaha F250 4-Stroke 250 HP.
Before you order, please verify:
- Engine model and model year
- Shaft length
- Gear ratio
Need help confirming fitment? Contact us for application assistance.
Yamaha® is a registered trademark of Yamaha Motor Co., Ltd. Use of the name is for reference only and does not imply affiliation or endorsement.