Lenny, my cutout which I am closing in is for a 20'' outboard. It is right at 20'' from the bottom of the keel. The cut out is 33 1/2''wide at the bottom and 44 1/2''wide at the top.('73 20SF)You can lay out these numbers on your transom or template, draw it out to get these angles and come up 5" at the bottom of your cut out and you should be there.(25'' from the bottom of the keel and bottom of your cut out)
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