didn't ask this exact question not a month before? If this wasn't you, you should check out that topic. Yes, on a boat that small, the horsepower rating should be taken very seriously. For example, if you had a horsepower of 15 on the 14 jon, taking it any further will result in a heavy stern - which will probably result in bow-tailing during the process of planing and may result in sinking...you know, the kinds where you take water from the stern and sink from that end! Hull design: most jon boats have very flat, thin hulls and if enough weight and power is acheived, the hull may give in, warp, and something bad's about to happen
I wouldn't try...is my answer
also, above the recommended horsepower and insurance won't take it as an excuse:blush:
Good Luck,
-Fish Mode