Yamaha - Lower Unit Assembly - Gearcase & Power Transfer - 64K-45300-03-NA

Overview

When a lower unit starts acting up on a 150, you feel it right away—either in the shift or the way it carries power. I’ve swapped a lot of these on motors that get run hard, and a fresh unit like this brings everything back to life. You get that solid engagement, smooth rotation, and confidence when you push it. It’s the kind of upgrade that makes the whole engine feel right again.

Key Features

• Complete Gearcase Assembly – Comes fully assembled with internal gearing for a full replacement solution.
• Smooth Power Delivery – Transfers engine power cleanly to the propeller for consistent performance.
• Corrosion-Resistant Build – Designed to hold up in saltwater and harsh marine environments.
• Reliable Gear Engagement – Provides smooth shifting with reduced noise and vibration.

Engine & Boat Compatibility

VZ150TLR – 2011-2014

FAQ

Q: What are the signs my lower unit needs replacing?
A: Grinding noise, slipping gears, or water in the gear oil are all clear warning signs.

Q: Can I reuse my propeller with this assembly?
A: Yes, as long as the shaft size and spline match your current setup.

Q: Do I need to service the unit before using it?
A: Always check and fill gear oil to the proper level before running it.

Q: How does saltwater affect this lower unit over time?
A: Salt can cause corrosion, especially around seals and housing, so regular flushing is important.

Q: Is installation something I can handle myself?
A: If you’ve done lower unit swaps before, it’s manageable—but proper alignment and torque are key.

• Supersessions
  64K-45300-00-NA, 64K-45300-01-NA, 64K-45300-02-NA, 64K-45300-04-NA, 64K-45300-04-NA