Proper shaft length?

1

1970Thunderbird

Petty Officer 2nd Class
Joined
Dec 24, 2009
Messages
111
I've measured my transom and it is 20.5" in length. This means the boat is designed for a longshaft outboard. However, I'm having difficulty locating an appropriate length motor. I'm looking at a motor whose cavitation plate sits about 3-4" above the keel. Am I going to be cavitating all the time, or is this an acceptable distance from keel to plate?

I'd hate to buy the motor, fix it and not be able to use it.

Thanks!
 
ezmobee

ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: Proper shaft length?

Even to about an inch or so above is typical. 3-4" would probably not work out.
 
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