Re: 1954 Feathercraft Skipper

[rapier]

There used to be a table / chart from the Outboard Industry Association to calculate safe horsepower, i.e length in ft x transom width in ft and read off on a scale gave you an (approximate) max hp. As westwind says anything higher than rated might negate your insurance policy, even if lighter than the original motors of the time. As an aside, I did run a ’65 Merc 200 on a 12ft Starcraft Sea Scamp (12ftx52in beam 44in transom, factory rated at 1-12hp) and it was very scary..