Originally Posted by Sitka deer
Negative, cavitation is when the propellor or impellor moves liquid so fast it creates bubbles and the bubbles collapse back on themselves. It is a term in science.

Ventilation is when the design of the boat allows water to get under the hull and into the prop or pump. They are not the same thing and yes, many people do not know the difference.

http://www.dictionary.com/browse/cavitation

cavitation
[kav-i-tey-shuh n]
Spell Syllables
Word Origin
noun
1.
the rapid formation and collapse of vapor pockets in a flowing liquid in regions of very low pressure, a frequent cause of structural damage to propellers, pumps, etc.
2.
such a pocket formed in a flowing liquid.
Origin of cavitation


The smartest man I ever met, ( and the wealthiest) quit college in his second year. He always said the most valuable lesson he ever learned was in his freshman year. His english teacher told him not to worry to much about proper english, the most important thing was to speak and write in such a way that you are easily understood by your audience. As a licensed EMT the first thing I think of when I hear "ventilation" is an exchange of air between the lungs and atmosphere.......or I need to get my window down to get some ventilation because the inside of the ambulance doesn't smell to good...

https://www.google.com/search?clien....1.1.64.psy-ab..7.1.566....0.5xd2HflZkBs

I dont think to many outdoorsmen worry to much about scientific terms. I've been running jet boats for 35 years and I've never heard anyone use the term "ventilation". Either way you dont want a hull that causes your pump to suck air, what you call it doesn't really matter, but if you use the term "cavitation" experienced boaters will know what you mean.

Last edited by yukon254; 05/04/18.