Originally Posted by codprawn
Depends on how you use the boat - if you are lugging it around all the time the weight could be a problem.
It depends if its trailered too of course. My SIB, a 3.5 Corsair was rated up to a 20hp, I put a 25hp Mariner on it, only thing it did was put a grin on my face. I had no problems at all.
My only worry was the engine bouncing about on the transom whilst it was towed, but a few well placed ropes and a lump of wood soon put my mind at rest.
I'd say go for it, just don't stray too far from the shore when you first gun it, just in case.
You'll soon know