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Yamaha Replacement Lower Unit | 2.15 | 25" | 4 Stroke | 90-405-B25F
SEI Marine
MPN : 90-405-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 | 2.15 |
| 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 | 2.15 | 25" | 4 Stroke | 90-405-B25F
Sale price
$1,195.00 USD
Regular price
Regular price
$1,195.00 USD
Unit price
per
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Description
Replacement Yamaha® Outboard Lower Unit — V4 2-Stroke (115/130 HP) & F115 4-Stroke (2000–2014)
Aftermarket replacement, built to fit. This complete gearcase is an aftermarket replacement for Yamaha V4 2-Stroke 115/130 HP and select F115 4-Stroke applications. It arrives fully assembled with the water pump and internal components installed for smooth shifting, dependable operation, and long service life—at a fraction of factory pricing.
Product Summary
- Replaces Yamaha V4 2-Stroke standard-rotation lower units — 115 HP & 130 HP models
- Also fits Yamaha F115 4-Stroke (2000–2014) — standard-rotation applications
- Complete assembly — water pump & all internal components pre-installed
- Precision-machined internals — gears, shafts, and bearings for reliable performance
- Durable black finish — can be refinished to match your outboard
- Cost-effective replacement — quality you can trust without OEM pricing
Compatibility Note: Standard rotation only. Not for counter-rotation models. Verify shaft length and gear ratio for your specific engine, especially on F115 year ranges.
Application & Fitment
Intended for Yamaha V4 2-Stroke 115/130 HP standard-rotation lower units and Yamaha F115 4-Stroke (2000–2014) standard-rotation models.
Before you order, please verify: engine model & year, shaft length, gear ratio, and rotation.
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. This is an aftermarket replacement part and is not manufactured by or affiliated with Yamaha. Names are used for fitment reference only.