Yamaha - Air Shroud Cylinder Cooling System Component 7HD-E2652-00-00. Overview. Air shrouds are easy to overlook, but they play a big role in keeping your engine temps where they should be. This one helps direct airflow around the cylinder so heat doesn't build up in the wrong spots. I've seen engines run hotter than expected just because airflow wasn't managed properly. When everything's in place, the motor runs smoother and handles long runs without issue.. Key Features. • Directed Cooling Airflow - Guides air around the cylinder to support consistent engine temperature.• OEM Fitment Design - Matches factory layout to ensure proper airflow routing and coverage.• Heat-Resistant Material - Built to handle engine heat and vibration in marine environments.• Supports Temperature Balance - Helps reduce hot spots that can impact engine performance over time.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that use air shrouds as part of the cooling airflow system. Common