Yamaha - Air Shroud Cylinder 2 Cooling System Component 7FK-12652-00-00. Overview. Air shrouds like this don't get much attention, but they're key to keeping your engine running evenly. It helps guide airflow right where it's needed around the cylinder, especially when the motor's working hard. I've seen uneven temps across cylinders just from missing or damaged shrouds. When everything's in place, the engine just runs smoother and holds temperature better.. Key Features. • Focused Airflow Routing - Directs cooling air specifically around cylinder two for balanced temperature control.• OEM Form and Fit - Built to match factory design for proper airflow alignment and coverage.• Heat-Tolerant Construction - Handles constant engine heat and vibration in marine environments.• Supports Even Engine Cooling - Helps reduce hot spots that can affect long-term engine performance.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that use cylinder-specific air shrouds as part of