[JohnB]

What I found is boats with flatter deadrises are closer to 2" per foot of setback, and boats with deeper deadrises are closer to 3", but it really comes down to having someone driving, and someone looking at the cavitation plate when your running.

I moved my motor up and down 4 times before I finally was statisfied. As stated above, get the straight edge, and I would start with the cavitation plate 3.5" above the straightedge. With twin 4 strokes on the back, it is problably going to ride a little lower in the stern.

Then dial in the negative trim with the engine trim.