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Yamaha Replacement Lower Unit | 25" | 90-423-B25F
SEI Marine
MPN : 90-423-B25F
Overview & Technical Specs
| Product Overview | |
|---|---|
| Fits | Yamaha |
| OEM Part # | 6HB-45300-03-CE |
| Unit Type | Lower Unit |
| Warranty | 3 Year Fault Free Warranty |
| Weight | 65.0 lb |
| Item Condition | New |
| Technical Specifications | |
| Gear Ratio | 1.75 |
| Rotation | RH |
| Shaft Length | 25" |
Increments of 1
Minimum of 1
Maximum of
10Low stock
10In stock, ready to ship
Sale price
$1,645.00 USD
-100%
Regular price
Regular price
$1,645.00 USD
Unit price
per
Yamaha Replacement Lower Unit | 25" | 90-423-B25F
Sale price
$1,645.00 USD
Regular price
Regular price
$1,645.00 USD
Unit price
per
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Description
SE423 Replacement Lower Unit for Yamaha® Outboards
Direct OEM-fit, ready to install. The SE423 series is engineered as a dependable, cost-effective alternative to OEM gearcases. Built to factory specifications and delivered fully assembled, it provides smooth shifting, reliable performance, and long service life—making repair or replacement hassle-free.
Highlights
- Direct OEM replacement — designed for Yamaha outboards covered by the SE423 series
- Complete gearcase — water pump and all internal components pre-installed
- Precision engineering — machined gears, shafts, and bearings for smooth, reliable operation
- Cost-effective — dependable performance at a fraction of OEM pricing
- Ready to install — no additional assembly required
Fitment Tip: Model coverage varies within the SE423 family. Verify your exact engine model, model year, shaft length, and gear ratio before purchase.
Application
Compatible with Yamaha outboard models supported by the SE423 series.
Need help confirming fitment? Contact us and we’ll match the correct unit to your engine.
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.