x dimension

ke_kahuna

Cadet
Joined
Jul 9, 2009
Messages
16
aloha i am ready to cut out my transom hole for my 86 cobra the template
says 14 3/32" from boat bottom this would put the av plate level with the bottom,but the installation instructions recommend the av plate 3/4" from boat bottom,my question is which is better ? if i raise it it would work out because the outdrive shield would clear my drain plug,if i have to lower it ,the plug would be in the way.but if for performance reasons it is better level with the bottom then i will move the drain hole or something.im just worried about the boat ventilating if i choose to raise it the 3/4 in.
any suggestions?
 

cr2k

Captain
Joined
Mar 19, 2009
Messages
3,730
Re: x dimension

Ideally the cavatation plate on your drive should be even with the bottom of your boat.

As long as you are not beyond this I would hope you could raise it to use your drain plug.
 

mkast

Lieutenant Commander
Joined
Nov 6, 2002
Messages
1,934
Re: x dimension

You might want to do a little reserch on this subject.
Rule of thumb is, the higher the propeller, in relation to the hull, the faster the hull will go, within reason. The higher the propeller, the more the hole shot suffers.
 
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