Re: Manual Trim Adjustment - help!
Welcome aboard pgott!!
I am going to move this over to the non-repair Outboard section.
The best answer is testing on the water. If she is hard to plane move further down (in) if she planes OK and you want more speed go further up (out). Other issues are burying the bow, then adjust up (out). If the bow seems too high in the air at speed adjust down (in). Sort of a feel and experience thing.
Another tip is to only make one adjustment at a time. Move it one hole at a time and then retest, and don't combine with other changes, like moving weight around. Do things independently and you'll learn more about that specific change