Yamaha - Flyweight Shaft Gear - Engine Timing Component - 7FK-11972-01-00

Overview

This is one of those internal parts you don’t see often, but when it’s worn, the engine won’t feel right. The flyweight shaft gear plays a role in timing and mechanical movement inside the powerhead, so everything needs to stay in sync. I’ve come across engines with odd timing behavior that traced back to worn or damaged gears like this. When it’s in good shape, the motor runs smooth and predictable like it should.

Key Features

• Precise Gear Engagement – Ensures accurate interaction with connected components for proper engine timing.
• Durable Metal Construction – Built to handle constant rotation, load, and internal engine stress.
• OEM Machined Fit – Designed to match factory tolerances for smooth operation without binding.
• Supports Engine Synchronization – Helps maintain consistent mechanical timing within the engine system.

Engine & Boat Compatibility

Designed for Yamaha outboard engines that utilize a flyweight shaft gear within the internal engine timing or control system. Commonly used across a range of Yamaha outboards where precise gear-driven movement is essential for proper engine operation.

FAQ

Q: What are signs this gear is worn or failing?
A: You might notice unusual engine noise, inconsistent timing behavior, or reduced performance.

Q: Is this something that fails often?
A: Not typically, but it can wear over time or if lubrication issues occur.

Q: Can this affect how the engine accelerates?
A: Yes, if timing or internal movement is off, acceleration and smoothness can be affected.

Q: Is replacing this gear a simple job?
A: It usually requires opening up the engine, so it’s more involved than external parts.

Q: What should I check when installing a new gear?
A: Make sure alignment is correct and that all related components are in good condition.

• Supersessions
  7FK-11972-00-00