New Yamaha 250HP 4-Stroke (2005–2018) Counter-Rotation Replacement Lower Unit Aftermarket | Fits 25″ & 30″ Shafts | 2.00 Gear Ratio | 1-Year Warranty
Original price was: $1,921.90.$1,699.00Current price is: $1,699.00.
Yamaha F75B | F90B | F115B | VF115 4-Cyl 4-Stroke Lower Unit (2014–2023) | New or Remanufactured | Fits 20″ & 25″ Shafts | 1-Year Warranty
Price range: $2,499.00 through $2,699.00
-14%
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New Yamaha F75–100 | F75/90A 4-Stroke (1999–2017) Replacement Lower Unit | Aftermarket | Fits 20″ & 25″ Shafts | New or Remanufactured | 1-Year Warranty
Original price was: $2,685.09.$2,299.00Current price is: $2,299.00.
Need help finding the right lower unit?
- Unsure about compatibility? Our team can verify the perfect fit for your Yamaha model.
- Call us at 888 868 7880 — we’re happy to guide you.
- Or fill out the form below in chatbox and we’ll respond quickly with the right match.
Description
Upgrade your Yamaha outboard’s performance and reliability with this direct-fit replacement lower unit. Designed for Yamaha 4-stroke F75, F90A, and F100 engines (1999–2017), this lower unit delivers OEM-level precision and durability — available in both new and remanufactured options to fit your budget.
Built to handle tough marine conditions, it fits 20″ or 25″ shaft configurations and installs easily with no modifications required. Whether you’re restoring performance or replacing a failed gearcase, this lower unit provides dependable, factory-grade operation at a fraction of OEM cost.
Key Features
Perfect OEM Fit: Direct-fit replacement for Yamaha F75, F90A, and F100 4-stroke outboards (1999–2017).
Multiple Options: Choose between new or remanufactured assemblies to match your needs and budget.
Available Shaft Lengths: 20″ and 25″ shaft versions ensure compatibility with most setups.
Durable Construction: Built for long-term use in both freshwater and saltwater environments.
Fully Assembled: Includes complete gearcase assembly — ready to install out of the box.
Hassle-Free Installation: Direct fit with no modifications or special tools required.
Warranty Coverage: Backed by a 1-year limited warranty for peace of mind.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | Yamaha F75–100HP Lower Unit |
| Compatible Models | F75, F90A, F100 (4-Stroke) |
| Horsepower Range | 75HP – 100HP |
| Years Supported | 1999 – 2017 |
| Condition | New or Remanufactured |
| Shaft Length | 20″ / 25″ |
| Gearcase Type | OEM Style |
| Warranty | 1 Year |
| Part Code / SKU | YA-G4-02 |
| Included Items | Fully Assembled Lower Unit |
| Installation | Direct Fit – No Modifications Required |
| Usage | Freshwater & Saltwater Compatible |
Why Choose This Yamaha 75–100HP Lower Unit?
This lower unit delivers OEM-grade quality without OEM pricing. Every assembly is tested for pressure and alignment, ensuring smooth performance, quiet shifting, and long-term reliability. Whether you choose the new or remanufactured option, you’ll enjoy a worry-free experience backed by trusted marine engineering.
- 100% ready to install
- Direct OEM replacement
- Backed by a 1-year warranty
Frequently Asked Questions – Yamaha F75–100 4-Stroke Replacement Lower Unit
1. What Yamaha outboard models are compatible with this replacement lower unit?
This lower unit fits Yamaha F75, F90A, and F100 4-stroke outboards manufactured between 1999 and 2017. It supports both 20″ and 25″ shaft lengths, providing direct-fit replacement without any modifications.
2. What options are available for this Yamaha 75–100HP lower unit?
You can choose between brand-new and remanufactured lower unit assemblies to best suit your budget and needs. Both options undergo strict quality control and are tested for pressure and alignment to ensure OEM-level performance.
3. How durable is this lower unit in different water conditions?
The unit is built for long-term durability in both freshwater and saltwater environments. It features marine-grade materials and finishes to resist corrosion and maintain reliable operation over many years.
4. Is the installation process complicated for this replacement lower unit?
Installation is straightforward and requires no special tools or modifications. The lower unit comes fully assembled and ready to install, making it a true plug-and-play upgrade or replacement.
5. What warranty coverage is offered for this lower unit?
This Yamaha 75–100HP replacement lower unit comes with a 1-year limited warranty, ensuring peace of mind against defects in materials and workmanship during normal use.
Looking for other models or gear ratios?
Browse all Yamaha Lower Units here — find compatible options for 40HP, 60HP, 115HP, 150HP, and more Yamaha outboards.
Additional information
| Weight | 85 lbs |
|---|---|
| Dimensions | 23 × 13 × 26 in |
| New / Remanufactured |
New Lower Unit ,Re-manufactured Lower Unit |
| Ratio/Shaft |
4 Stroke / L (20inch) shaft ,4 Stroke / XL (25inch) shaft |
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