YAMAHA 2T 250HP 225HP Lower Unit Assy 61A

Yamaha 2T 250HP & 225HP Lower Unit Assembly (61A-45300-25-8D)

Premium Replacement for Yamaha 2-Stroke Outboards

The Yamaha 2T 250HP & 225HP Lower Unit Assembly (Part No. 61A-45300-25-8D) is a genuine Yamaha replacement designed to restore and enhance the performance of your two-stroke outboard engine. Built for power, precision, and endurance, this assembly delivers reliable power transfer, smoother shifting, and exceptional durability — making it the perfect choice for demanding marine use.

Whether you’re an offshore fisherman, a professional operator, or a weekend cruiser, this Yamaha lower unit ensures that your outboard performs at its best every time you hit the water.

⚙️ Key Features

1. Rugged, Corrosion-Resistant Construction

Crafted from high-strength marine-grade alloys, this lower unit resists corrosion in both saltwater and freshwater environments. Its precision-engineered housing ensures maximum durability and long-lasting reliability — even under extreme marine conditions.

2. Optimized Gear Ratio for Peak Performance

The Yamaha 61A lower unit features an optimized gear ratio that efficiently transfers engine power to the propeller. This design improves torque, acceleration, and top-end speed, ensuring superior performance across a wide range of boating applications.

3. Ultra-Smooth Operation

Yamaha’s engineering excellence guarantees minimal vibration and mechanical noise. The refined gear system ensures seamless shifting and steady operation, providing a quiet and comfortable boating experience.

4. Direct OEM Fit and Easy Installation

This unit is designed as a direct-fit replacement for Yamaha 2T 225HP and 250HP outboard motors. It installs easily without modification — perfect for both certified marine technicians and experienced boat owners.

5. Reliable Propeller Engagement

Enjoy responsive throttle control and smooth propeller engagement with Yamaha’s precision-machined gear set. This responsiveness is crucial for high-performance applications like offshore fishing, towing, and high-speed cruising.

6. Genuine Yamaha Quality

Each lower unit assembly is factory-tested and certified by Yamaha for quality and performance. You’re getting the same reliability and craftsmanship trusted by professionals worldwide.

🌊 Benefits

• Superior Durability: Built to handle continuous use in harsh marine conditions.

• Fuel Efficiency: Optimized design reduces drag and enhances overall efficiency.

• Smooth, Quiet Operation: Minimal vibration means a more enjoyable boating experience.

• Peace of Mind: Genuine Yamaha part backed by proven reliability.

• Performance Upgrade: Restores lost power and precision to aging or damaged lower units.

📋 Specifications

⚓ Applications

The Yamaha 61A lower unit is ideal for:

• Offshore and deep-sea fishing vessels

• Recreational powerboats

• Commercial marine operations

• High-performance 2-stroke setups

Its strength and efficiency make it a favorite among serious boaters who demand reliability and speed in equal measure.

❓ Frequently Asked Questions (FAQ)

Q1: Is this lower unit compatible with both the Yamaha 225HP and 250HP 2-stroke models?
Yes. This unit is specifically engineered for Yamaha 2-stroke 225HP and 250HP outboards for a precise OEM fit.

Q2: Does the assembly come with gear oil or seals?
Typically, the lower unit ships dry. We recommend filling it with Yamalube Marine Gear Oil and installing new seals during fitting for best performance.

Q3: Can I install it myself?
Yes, installation is straightforward for experienced marine mechanics or DIY enthusiasts with proper tools. For best results, Yamaha recommends professional installation.

Q4: How do I know if I need to replace my lower unit?
Common signs include leaking oil, gear grinding, loss of thrust, or difficulty shifting. If your existing lower unit fails a pressure test, replacement is advised.

Q5: How often should I service the lower unit?
Perform a gear oil change every 100 hours or once per season, and inspect seals and bearings regularly.

🛠️ Why Choose the Yamaha 61A Lower Unit Assembly?

When you invest in Yamaha, you invest in precision engineering and decades of marine innovation. This 61A lower unit assembly delivers unmatched reliability, optimal gear performance, and factory-level quality — ensuring your outboard runs like new.

Unlike aftermarket alternatives, genuine Yamaha parts are tested for endurance, precision-fit, and long-term efficiency, guaranteeing your outboard stays powerful and dependable.

🏁 Conclusion

The 5HP Lower Unit AssemYamaha 2T 250HP & 22bly (61A-45300-25-8D) is the ultimate replacement for restoring your Yamaha’s performance and longevity. With its durable construction, smooth operation, and fuel-efficient design, it’s built to meet the highest marine standards.

Upgrade your outboard today and experience the difference Yamaha engineering makes — power, precision, and performance you can rely on.