I have Hermco's twin glass bracket. I think Stoner's are from the same mold (?) I still have Don's instructions in mail if anybody needs them. His instructions say top of platform at 26" above keel. Originally I had a 2 stroke 30" 250 Yamaha and re-powered to a 4 stroke 30" 300 Yamaha. I'm all the way up and would like to try higher but that would require a jack-plate. Based on my experience, I would like the ability to have more adjustment.
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