One situation with the 115 H.P. motors is that the Optimax 115 just isnt a very strong motor. The E-tech 115 would be much better for any bass boat application in my opinion. The 4 stroke 115s may even have more bottom end umphhh than the 115 optimax. The 115 Opti and the 75 opti are the same blocks so that gives you an idea. Again, If I wanted to put a 115 h.p. motor on a bass boat It would probably be the 115 e-tech for me. I would also look closely at the 115 4 strokes by yamaha, mercury, suzuki, honda. All very good motors and run very well.The Margay should have no problem performing just fine with a 115 h.p. motor. It just requires a little different setup and you must be careful with the amount of weight you are putting in the boat when going with a smaller motor. Chris CoupelPaulina, La.Chris CoupelPaulina, La.