Pontoon Motor Cavitation
Water disturbance from the pontoons can also cause it on some toons.
Pontoon motor cavitation. Why Ventilation in turns occu. Recently mounted a Force 85HP motor on a 21 foot National Pontoon. Seems to be a great combination with only one issue that I have yet to figure out after only two outings.
Cavitation wastes energy and makes the propeller noisy as the vapor bubbles collapse and most seriously erodes the props surface due to localized shock waves against the blade surface. 2009 LOWE SS204 25in logs. Working on getting the prop right went from 19P to 15P to 13P.
Normally cavitation occurs when the prop is too close to the surface of the water. Its a plague of pontoon boats and why merc invented Big Foot motors. Should get a smooth flow from bottom of mounting box across cavitation plate-like air over an airplane wing.
They arent the same thing and people often mistake one for the other. Cavitaion usually occurs as a result of damage and youll feel it in the form of vibrations. Motor cavitating on pontoon boat I have a friend who bought a palm beach 22ft pontoon boat with the 22 pontoons instead of the 19 standard pontoons.
Since I have fishing chairs in the rear seating passengers behind the helm is not an option when I am underway. Cavitation is bad for three reasons. Cavitation plate on motor should be even with bottom of mounting box.
A similar but quite separate issue is ventilation which takes place when air is introduced to water around or to the water flow fed to a propeller. Pontoon Motor Cavitation I have just purchased a new 18 ft pontoon with a new Honda 50 hp outboard. Cavitation wastes energy makes the propeller noisy as the vapor bubbles collapse and most seriously erodes the props surface due to localized shock waves against the blade surface.
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