Yamaha - Air Shroud Cylinder 1 Engine Cooling Component 7CT-E2651-00-00. Overview. Air shrouds don't look like much, but they play a big role in how well an engine stays cool. I've seen motors run hotter than they should just because a shroud was cracked, missing, or not seated right. These pieces help direct airflow exactly where it's needed around the cylinder. When everything's in place, the engine runs more efficiently and holds up better over time.. Key Features. • Directed Airflow Design - Channels cooling air around the cylinder for proper heat management.• OEM Fit and Coverage - Matches factory shape for correct placement and airflow routing.• Heat Management Support - Helps prevent overheating during extended operation.• Durable Construction - Built to withstand engine heat and vibration in marine conditions.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that utilize air shrouds as part of the engine cooling system. Commonly used across a range of Yamaha o