Johnson Pump 2321247 New Airv Radial Blower johnson Pump 80-47417-01 Flange Hose 4" CFM 324 12V 12.5A 11.5"H x 10"W x 6"L : Extra heavy duty marine radial blower is designed for engine compartment ventilation prior to startup. Made for continuous duty and is therefore suitable for air intake or extraction in bilges galleys accommodation and other compartments. Flange Mount design with double ball bearing motor high-impact anti-shock ABS body with stainless steel shaft and screws.