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Message: <blockquote data-quote="Ray Clark" data-source="post: 522991" data-attributes="member: 31103">Welcome to the forum.I think Crazyboat is right; that motor looks like a long shaft on short transom.  A quick review of the Alumacraft catalog from 2016 showed that their jon boat offerings in 12' had 15" transoms.  Short shaft motors are about 5" shorter, and the cavitation plate (that flat piece of the lower unit just above the prop) typically rides about even with or just below the bottom of the boat.  It sounds as if you intend to run the boat in shallow areas; that long shaft motor will be very inconvenient.  I don't know of any cost-effective ways to shorten the existing motor.</blockquote>