Briggs & Stratton Vane-Air 592580 Genuine OEM. This is a Genuine OEM Briggs & Stratton part. This air vane (part number 592580) is for lawn and garden equipment engines. Air vane 592580 opens the engine choke as air from flywheel fan blows through the air vane. Disconnect the spark plug wire befo... - Briggs & Stratton Vane-Air 592580 Genuine OEM.