WHAT IS BLOWOUT?
“Pro peller blowout” refers to a sudden loss of forward thrust caused by high-speed ventilation of the prop. It’s as if the blades suddenly ran into a big air pocket in the water. The motor revs up, the boat falls off its angle of attack, and sometimes the sudden loss of steering wheel torque causes an unsuspecting driver to yank the boat into a left-hand hook. At very high speed, it can be startling and potentially dangerous. The actual cause of the interruption of clean blade “bite” can vary. Some of the most common causes are: 1) Turbulence ahead of the blades from sources such as: speedometer pick-ups, depth transducers, and barnacles or imperfections along the boat’s running surface or gear case. Fix these problems by relocating, removing or refinishing the offending item. 2) A damaged, poorly designed, incorrectly selected, or improperly modified blades. Repair or replace the blades. You won’t always be able to tell if a blade is bad without inspecting it on a pitch block. 3) A g
Many high-performance boaters are aware of a phenomenon that limits their top speed below what would otherwise be possible with the available horsepower. This phenomenon is commonly called “gearcase blowout,” “propeller blowout,” or just “blowout.” The current gearcases used by Stingray Boats will not “blowout” under normal conditions with maximum available horsepower.
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