YAMAHA F300 F250 F225 Lower Unit - Image 3

YAMAHA F300 F250 F225 Lower Unit - Image 4

YAMAHA F300 F250 F225 Lower Unit - Image 5

YAMAHA F300 F250 F225 Lower Unit - Image 6

YAMAHA F300 F250 F225 Lower Unit

6KA-45300-00-8D

6ML-45300-00-8D

Brand new genuine Yamaha Lower unit F300 / F250 / F225 never installed, never in operation, in genuine Yamaha box

From 2020′ to 2023′ & up

Standard Rotation

XXL-shaft=30″ gearbox with all accessories included as on the photo

Suitable to replace also XL=25″ & XXXL=35″ gearboxes adding/removing/replacing some of accessories: extension spacers, intermediate drive/shift shafts, water pipes…

Global Shipping Made Easy

Region	Delivery Time	Special Notes
USA/Canada	1-3 days	No customs
Europe	2-4 days	CE certified
Australia	3-5 days	AMSA approved

1,900.00$

(FREE SHIPPING)

⚙️ Yamaha F300 F250 F225 Lower Unit Assembly 6KA-45300-00-8D — Power, Precision, and Reliability

Boost Your Yamaha Outboard’s Performance

Keep your boat running at peak performance with the Yamaha F300 F250 F225 Lower Unit Assembly (Part No. 6KA-45300-00-8D) — a genuine OEM replacement built to deliver the durability and precision Yamaha is known for.
Whether you’re replacing a worn-out lower unit or upgrading for enhanced performance, this assembly ensures smooth operation, improved fuel efficiency, and long-lasting reliability for your Yamaha outboard motor.

At OutboardMarineUSA.com, we supply authentic Yamaha marine parts to help you get the most out of your time on the water.

🛠️ Key Features

1. Heavy-Duty, Corrosion-Resistant Construction

Crafted from high-grade marine alloys, the Yamaha F300 F250 F225 lower unit resists corrosion and damage from saltwater exposure. Its robust design ensures dependable performance in even the toughest conditions.

2. Optimized Gear Ratio for Maximum Efficiency

This OEM lower unit features an optimized gear ratio designed to maximize thrust and torque, improving acceleration and maintaining excellent top-end speed. The result is smoother cruising and better fuel economy.

3. Whisper-Quiet Operation

Engineered for precision and balance, the Yamaha F300 F250 F225 lower unit minimizes vibration and reduces noise, creating a smooth, quiet ride — ideal for both recreational boating and professional marine use.

4. Direct OEM Fit

The 6KA-45300-00-8D assembly is a perfect fit for Yamaha F300, F250, and F225 outboard motors. Installation is quick and straightforward, whether you’re a certified marine technician or a hands-on DIY boater.

5. Enhanced Propeller Responsiveness

Enjoy faster throttle response and consistent propeller engagement. The precision design ensures seamless power transfer, giving you confidence and control at any speed.

🌊 Benefits of the Yamaha F300 F250 F225 Lower Unit Assembly

✅ Restores Peak Engine Performance – Keeps your Yamaha outboard operating at factory specifications.
✅ Boosts Fuel Efficiency – Optimized power transfer reduces drag and fuel consumption.
✅ Long-Lasting Durability – Built from corrosion-resistant materials that withstand marine wear.
✅ Low Maintenance – Simple inspection and servicing keep your motor performing at its best.
✅ Trusted OEM Quality – Manufactured to Yamaha’s strict quality and performance standards.

📋 Specifications

Specification	Details
Model Compatibility	Yamaha F300, F250, F225
Part Number	6KA-45300-00-8D
Material	Corrosion-resistant marine-grade alloy
Gear Ratio	Optimized for Yamaha factory performance
Application	Suitable for recreational, commercial, and fishing vessels
Condition	Genuine OEM Yamaha replacement part

⚓ Why Choose OutboardMarineUSA.com for Your Yamaha Parts?

At OutboardMarineUSA.com, we’re more than a parts store — we’re your trusted marine performance partner.
We specialize in authentic Yamaha outboard lower units and marine components designed to extend the life and efficiency of your engine.
Every part we sell is backed by genuine OEM quality assurance, ensuring you get reliability, performance, and value every time.

🔗 Explore more Yamaha lower units and marine parts:
https://outboardmarineusa.com/collections/yamaha-lower-units

🧭 Order Your Yamaha F300 F250 F225 Lower Unit Assembly Today

Get back on the water with confidence. The Yamaha F300 F250 F225 Lower Unit Assembly (6KA-45300-00-8D) provides the perfect blend of strength, efficiency, and smooth operation — engineered by Yamaha, trusted by professionals, and available now from OutboardMarineUSA.com.

🚀 Shop now at OutboardMarineUSA.com and experience the power of genuine Yamaha performance.

❓ Frequently Asked Questions (FAQ)

1. Is this Yamaha F300 F250 F225 lower unit OEM or aftermarket?
This is a genuine OEM Yamaha lower unit assembly (6KA-45300-00-8D) — not a replica or aftermarket product.

2. Will this fit both 25” and 30” shaft lengths?
Yes, but you should verify your outboard’s shaft configuration before purchase to ensure compatibility.

3. Do I need professional installation?
While many experienced boaters can install this unit themselves, Yamaha recommends professional installation to ensure proper alignment and sealing.

4. How do I maintain my Yamaha lower unit?
Regularly check and replace gear oil, inspect the seals, and avoid operating in debris-filled waters. Proper maintenance extends the lifespan of your lower unit.

5. Does OutboardMarineUSA.com ship internationally?
Yes — we ship worldwide! All orders are handled with care to ensure your Yamaha parts arrive safely and quickly.