[flyingfrizzle]

I built a jig to hold the bracket in a floor jack so I could raise and lower easily when fitting up the one on my 20. Used a plumbob on the mounting tab and measure down from mounting height to your position you want your av plate. Make sure you pull measurements on the outboard as all 25" motors are not the same length to the av plate. Use a stright edge off the bottom of the boat to determine where the hull bottom is at your set back. Figure in the water rise off of the transom. Get the plumbob and market length of the mounting point of the outboard to the av plate on the string. Set the bottom mark (av plate) of the string of the plumbob at the correct height above the stright edge corrected for water rise and the top mark on the string (outboard mounting point) is where the bracket mounting tab needs to go. Figure it so that your outboard is in the lowest position in the adjustment so you can still raise the outboard as it likely will need to be raised not lowered once water tested in motion. Also don't forget the boat must be sitting on the trailer how it will sit in the water when mocking this up. Guessing the boat angle will be the hard part.