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Yamaha Replacement Lower Unit | 30" | 4 Stroke | 90-422-B30F
SEI Marine
MPN : 90-422-B30F
Overview & Technical Specs
| Product Overview | |
|---|---|
| Fits | Yamaha |
| Unit Type | Lower Unit |
| Warranty | 3 Year Fault Free Warranty |
| Weight | 75.0 lb |
| Item Condition | New |
| Technical Specifications | |
| Combustion | 4 Stroke |
| Gear Ratio | ALL |
| Rotation | RH |
| Shaft Length | 30" |
Increments of 1
Minimum of 1
Maximum of
10Low stock
10In stock, ready to ship
Sale price
$1,395.00 USD
-100%
Regular price
Regular price
$1,395.00 USD
Unit price
per
Yamaha Replacement Lower Unit | 30" | 4 Stroke | 90-422-B30F
Sale price
$1,395.00 USD
Regular price
Regular price
$1,395.00 USD
Unit price
per
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Description
SE422 Replacement Lower Unit for Yamaha® F250
Direct OEM-fit performance. The SE422 is a purpose-built replacement for Yamaha F250 4-Stroke gearcases. It arrives fully assembled and ready to install, engineered to meet or exceed factory specifications for smooth shifting, dependable operation, and long service life.
Highlights
- Direct-fit replacement for Yamaha F250 4-Stroke lower units
- Dual water intakes supported; also compatible with early side-intake versions
- Water-cooled bearing carrier for added strength and improved thermal control
- Complete assembly — water pump and all internal components pre-installed
- OEM-level engineering — precision-machined gears, shafts, and bearings
- Durable finish — painted black; can be refinished to match your Yamaha
Compatibility Note: Designed for Yamaha F250 4-Stroke applications with dual or early side water intakes. Verify intake style on your engine if unsure.
Application
Direct replacement for Yamaha F250 4-Stroke outboard lower units covered by the SE422 series, including both dual water intake models and early side-intake versions.
Before you order, please verify:
- Engine model and model year
- Shaft length (20″/25″/30″ as applicable)
- Gear ratio
- Water intake style (dual vs. side-intake)
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.