View Single Post
  #11  
Old 09-26-2009, 11:28 PM
Fr. Frank Fr. Frank is offline
Senior Member
 
Join Date: Oct 2003
Location: Shalimar, Florida
Posts: 2,265
Default Re: Another prop question

Quote:
If I pull a string line down the keel and adjust the motor so the cavitation plate is parallel with the string the plate is 1 1/8 inches above the keel line.
Dave
That should be close. Another way to look is to run on plane with the motor trimmed all the way down and in. Look over the transom at the cavitation plate and it should be clear and above the immediate wake passing from below the hull. If water is coming over the plate or hitting the bottom of the front of the cavitation plate, your motor is mounted too low.
I think Dixon is right here, you're probably going to need to reduce pitch and/or diameter of your prop.
__________________
Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.

Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!

Currently without a SeaCraft
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury
Reply With Quote