I have a little 15' homemade skiff ( http://bellsouthpwp.net/o/b/ob15/ )with an evinrude 50hp on the back. The antiventilation plate is appoximately 1/4"-3/8" below the keel. I was thinking about raising it 1 hole on the mount which would put it around 1/2" above the keel. What will this do for performance or should I just do it and see what happens? Right now I have the prop/rpm's (4 balde 11.5"x16) tweaked just right (WOT - 5400 rpm) but have another prop with 1" more pitch (3 blade 11.75"x17). I know the 4 blades will give better hole shots & midrange handling and lower top speed vs. the 3 blade.<br /><br />Also, what is the minimum distance the prop should be from the antiventilation plate?<br /><br />Thanks in advance.
