I have a 20 ft fisher pontoon with a mercury 75hp on it. The boat is rated for a 75hp. A friend of mine has an old bass boat that has a mercury 115hp on it. He just had his 115 rebuilt and he doesn't use it. I want to buy it and put it on my pontoon. What do you think? The motors weigh about the same. Thanks for any input. 1Cove