I had a 42 pound Minn Kota for my 16' Mirrocraft and moved it over to a 20' Lund Alaskan with no problem. My son wanted it when he took the Mirrocraft so I replaced it with a 70 pound /24 volt Power Drive unit. The 70 pounder can be scary when it kicks in and swings the bow rapidly if you're not expecting it. The disadvantage of the higher thrust electrics is the 24 or 36 volts they require, which may require mounting and additional battery. I'd have been happy to stick with my original 42 pound unit so I don't think you'd have an issue with a 55. Glass boats are a little heavier, bit once in motion I don't think they take a whole lot more power to keep moving.
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