Yamaha - Driven Gear Engine Timing Component 6J8-11537-00-00. Overview. When internal gears start wearing down, it's not always obvious at first-but the engine will let you know over time. I've seen driven gears cause everything from strange noises to performance loss when they're not meshing right anymore. This is one of those parts that keeps everything turning in sync behind the scenes. Replace it when needed, and you keep the engine running smooth and dependable.. Key Features. Precision Gear Engagement - Ensures smooth interaction with mating gears for proper engine operation.. Durable Hardened Construction - Built to handle continuous rotation and internal engine loads.. Factory-Spec Tooth Profile - Designed for accurate timing and reliable performance.. Supports Internal Synchronization - Helps maintain correct movement between engine components.. Wear-Resistant Design - Reduces long-term degradation under normal operating conditions.. Engine & Boat Compatibility. Designed for Y