I have a 99 johnson 115 that is on a 99 triton bass boat. I just bought this and it has a miss at idle and is hard to start but once it warms up it will start fine. I went out today to try to test it out and once i got it started i put it in gear and it would die, i could ease it into gear and it would be okay but the second i gave it any more fuel it would shut down. I was told it was not run in a while, all i have done is changed the plugs, put new gas in it and put c-foam in the tank. Any thing you suggest that may be an easy fix before i take it somewhere and spend more, thanks!