By Jim Russell, P. Eng, Aeromarine Research
I receive many questions about the cause and effects of "blowout". Here is an explanation of blowout and causes and cures.
Most all high-performance boaters have experienced the circumstance that restricts their maximum velocity to less than it could be, even though they’ve got the horsepower available to use. This phenomenon is commonly called "gearcase blowout” or "propeller blowout".
Blowout occurs when something causes air/water mixture in the region of the propeller to become sufficiently disturbed that the