Hi, I have a 1996 Evinrude 200 two stroke that I recently purchased. The guy who owned it before me let it sit for a year or so. I had a mechanic pump out the fuel tank, rebuild the carbs and replaced the impelar and housing (warped). I replaced the fuel lines and anti siphon valve inside the fuel tank. SO, the ISSUE is, the motor runs fine when sitting on the trailer in my yard. However, as soon as I put it in the water it keeps shutting off. Once I do manage to get it to take off, the boat will run from 1/4 to 3/4 throttle, but if I try to go above it starts raving like its starving for fuel. At idle speed it shuts off as well as in neutral. I noticed that the inline filter constantly has air in it. I also replaced the fuel pump, but no luck....thoughts?