Yamaha - Starting Motor Gear Assembly Engine Starting Component 7CP-H1807-00-00. Overview. When you turn the key, this gear assembly is what helps bring the engine to life. If it's worn or not engaging properly, you'll hear it right away-grinding, slipping, or no turnover at all. I've dealt with a lot of no-start situations that came down to this exact part. When it's in good shape, the engine cranks clean and fires up without hesitation.. Key Features. • Reliable Starter Engagement - Transfers power from the starter motor to the engine for dependable starts.• Durable Gear Construction - Built to handle repeated starting cycles and engine load.• OEM Fit and Alignment - Matches factory specs for proper gear mesh and smooth operation.• Consistent Cranking Performance - Helps eliminate slipping or grinding during startup.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that utilize a gear assembly within the starting motor system. Commonly used across a range of Yamaha