This product has been superseded by: 62Y-45300-52-8D

Yamaha - Lower Unit Assembly - Drivetrain Component - 62Y-45300-51-8D

Overview

The lower unit is what delivers engine power to the propeller, and when it starts to wear out, you’ll feel it right away—rough shifting, vibration, or inconsistent performance. This Yamaha lower unit assembly is built to restore smooth operation and reliable power delivery. Designed for precise fitment and durability, it helps maintain efficient performance and dependable handling in both freshwater and saltwater environments.

Key Features

• Smooth Power Transfer – Delivers consistent propulsion from engine to propeller.
• OEM Yamaha Fitment – Built to factory specifications for accurate alignment and installation.
• Heavy-Duty Gearcase Design – Handles demanding marine use and engine loads.
• Corrosion-Resistant Construction – Built to perform in harsh marine environments.

Engine & Boat Compatibility

• Compatible with select Yamaha outboards (confirm fitment by model and year)

FAQ

Q: What are signs the lower unit needs replacement?
A: Grinding noise, slipping gears, or water contamination in gear oil are common indicators.

Q: Can I rebuild instead of replacing it?
A: Minor wear can sometimes be repaired, but major internal damage usually requires full replacement.

Q: Will this improve performance right away?
A: Yes, smoother shifting and better power delivery are noticeable after installation.

Q: Is this suitable for saltwater use?
A: Yes, with proper maintenance, it performs well in saltwater environments.

• Supersessions
  62Y-45300-10-4D, 62Y-45300-11-4D, 62Y-45300-51-4D, 62Y-45300-52-8D, 62Y-45300-53-8D, 62Y-45300-53-8D