What is propeller ventilation?
Ventilation occurs when air from the water’s surface or exhaust gases from the exhaust outlet are drawn into the propeller blades. The normal water load is reduced and the propeller over-revs, losing much of its thrust. This action most often occurs in turns, particularly when trying to plane in a sharp turn or with an excessively trimmed-out engine or drive unit. Ventilation can also be caused by aerated water from step bottom hulls. Stingray Boats’ patented z-plane hull’s bottom allows for less propeller ventilation than boats with conventional hulls.
