Did you verify that you have the fuel line connected to the Fuel Inlet Nipple on the carb? I made this mistake this weekend and couldn't get the ski to start. I crossed to hoses and had them connected to the wrong carb nipples. You should have 3 carb nipples, Fuel line from the main fuel filter to the Fuel Inlet Nipple, Pulse nipple to the engine, and the Return Fuel line nipple to the Fuel Pump.