Yamaha - Throttle Body 1 Air Intake Control 6D0-13751-01-00. Overview. When you're dialing in a Yamaha outboard, throttle response is one of the first things you notice. This throttle body plays a key role in how smooth and responsive the engine feels when you bring it up or back it down. I've seen engines hesitate or feel uneven just from buildup or wear in this area. When it's working right, you get clean, steady control that makes a big difference on the water.. Key Features. • Controlled Air Intake Flow - Regulates airflow into the engine for consistent throttle response.• Smooth Throttle Operation - Helps deliver steady acceleration without hesitation or surging.• Durable Internal Design - Built to handle constant movement and engine vibration.• Precision Airflow Management - Supports proper air and fuel balance for efficient combustion.• Factory-Spec Fitment - Designed to match Yamaha intake systems for accurate installation and performance.. Engine & Boat Compatibility. Designed