I have a mercury 150 mercruiser(oil and gas Mixture) the boat itself is an astro.Entering the water boat started fine,drove to first location fine,stopped and started to next location boat was fine,after doing this about three times and letting boat sit,while i used trolling motor to fish,each time i stopped on an average of 30 to 40 minutes.When I try to start this time it would not start,not onlt that it would have the strong smell of gas and look like it was leaking out,or possibly flooding.I replaced hoses and figured that would work.Ran motor at home sarted fine.Get to the dock this week to try to fish the same exact thing happened again, I need help.