Anything is possible, but adding to the length or width may make the boat a bit tippy. Usually pontoon boats are as wide as can be towed on the highway so that also poses a concern. The boat should have a maximum horsepower rating posted on it and I'd use that as your guide as to how much power you can safely run on it. I'd bet it's not rated for over 90 h.p - if that.


I would think converting an existing boat trailer to a pontoon trailer would only allow you to use or salvage the axle, wheels / tires, and some of the frame as they are completely different designs. That doesn't mean you shouldn't consider it, just keep in mind that the retrofit might be more work than starting with individual parts.