I bought a pontoon boat with a 90 hp Mecury, 2004 outboard. The guy I bought it from said it had been sitting for five years but was in good shape when he put it up. I flushed out the fuel tank and line to the bubble. Put new spark plugs, new battery and fresh gasoline. It turns over but will not start. So I got some starter fluid and sprayed some in the intake. It started and ran untill it used up the starting fluid. Does anybody know if these motors have a shut off valve on the gasline somewhere that I cannot see it? Or can somebody give me an idea what to do next to get it running.