Yamaha - Driven Gear Engine Timing Component 6H3-11537-01-00. Overview. The Yamaha Driven Gear 6H3-11537-01-00 is one of those internal parts that keeps everything in sync inside the engine. When a gear like this starts to wear, it usually shows up as noise, rough running, or timing issues you can't quite pin down at first. It works behind the scenes to keep components moving together the way they should. If you're already inside the engine doing repairs, this is one of those parts worth replacing to avoid bigger problems later.. Key Features. • Precise Gear Synchronization - Keeps internal engine components moving in proper timing.. • OEM Fit Precision - Built to Yamaha specifications for accurate meshing and alignment.. • Smooth Operation Support - Helps reduce internal resistance and unwanted engine noise.. • Durable Load Handling - Designed to withstand constant rotation and engine stress.. Engine & Boat Compatibility. Compatible with select Yamaha outboard engines using this drive