Yamaha - Driven Gear Engine Gear Component 6C5-11537-10-00. Overview. When a driven gear starts wearing down, you'll usually hear it before anything else-whine, chatter, or a rough feel when the engine's under load. This gear plays a key role in transferring motion through the engine, and when it's off, it puts extra stress on everything around it. I've seen small gear issues turn into bigger repairs when they're ignored too long. Keeping this part in good shape helps the engine stay smooth and reliable.. Key Features. • Efficient Power Transfer - Helps move rotational force smoothly through the engine system.. • Precision Gear Teeth - Designed for clean engagement and reduced internal wear.. • OEM Fit Accuracy - Matches Yamaha factory specs for proper alignment and function.. • High Strength Construction - Built to handle continuous load and engine stress.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before installation..