Join Date: Feb 2011
Location: San Francisco Bay area
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Re: Tohatsu 6hp Sail-Pro Version
"All I was referring to was not putting the motor mount too far down such that the cavitation plate is way below water level..."
If the propeller is low so that the cavitation plate is way below the water level, there will be no cavitation to prevent. But you WILL prevent the prop from coming out of the water when it is rough. On a sailboat, if you do place the cavitation plate at water level the prop will be coming out of the water every time you hit a wave.
In other words, for a sailboat the longest shaft is best - unless it is so long that you're hitting the bottom. Which I doubt.
Bristol 31.1, San Francisco Bay