What Causes Propeller Ventilation?

Stainless steel propeller with vent holes

What Causes Outboard Propeller Ventilation? Propeller ventilation is often confused with cavitation. For information about cavitation, see our What is Propeller Cavitation post. Propeller ventilation is when surface air or exhaust gasses are drawn into the propeller blades. When this occurs, boat speed is lost, and engine RPM increases rapidly. What causes Propeller Ventilation? Propeller […]