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Yamaha Replacement Lower Unit | 2.0 | 25" | 2 Stroke | 90-404-A25
SEI Marine
MPN : 90-404-A25
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 | 2 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 | 2.0 | 25" | 2 Stroke | 90-404-A25
Sale price
$1,195.00 USD
Regular price
Regular price
$1,195.00 USD
Unit price
per
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Description
SE404 Replacement Lower Unit for Yamaha® 75–100 HP
OEM-fit performance without the OEM price. The SE404 is engineered as a reliable, direct-fit alternative for select Yamaha 2-Stroke and 4-Stroke outboards. Built to factory specifications for smooth shifting, long service life, and dependable on-water performance, each unit arrives fully assembled and ready to install for a hassle-free replacement.
Highlights
- Direct-fit coverage for select Yamaha 2-Stroke & 4-Stroke 75–100 HP models (standard rotation)
- Excludes newer models — not compatible with 2016+ 4-Stroke engines whose model codes end in “B”
- Complete assembly — water pump and all internal components pre-installed
- OEM-quality construction — precision-machined gears, shafts, and bearings for smooth operation
- Durable finish — painted black; can be refinished to match your Yamaha
- Cost-effective — quality replacement at a fraction of OEM pricing
Compatibility Note: SE404 is for standard rotation 75–100 HP applications and does not fit 2016+ 4-Stroke models ending in “B.” If you’re unsure of rotation, gear ratio, or model suffix, please verify before ordering.
Application
Direct replacement for Yamaha 2-Stroke and 4-Stroke 75–100 HP standard rotation lower units covered by the SE404 series. Not compatible with 2016 and newer 4-Stroke models ending in “B.”
Before you order, please verify:
- Engine model and model year
- Shaft length
- Gear ratio
- Rotation (SE404 = standard rotation)
Need help confirming fitment? Contact us for quick 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.