Yamaha - Throttle Body Assembly Air Intake Component 6C5-13750-00-00. Overview. When a motor doesn't respond the way it should, this is one of the first places I start looking. The throttle body assembly controls how air moves into the engine, and that directly affects how smooth it runs and how it reacts when you hit the throttle. If it's worn or not operating cleanly, you'll feel hesitation or uneven power pretty quickly. Getting a solid assembly back in place brings back that crisp, predictable throttle feel.. Key Features. • Controlled Air Intake - Regulates airflow into the engine for proper fuel and air balance.. • Smooth Throttle Response - Helps eliminate hesitation and keeps acceleration consistent.. • OEM Fit Accuracy - Matches Yamaha factory specs for proper alignment and installation.. • Durable Intake Construction - Built to handle airflow pressure, heat, and marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and