MOtor has 250 hrs on it. I recently replaced everything from the gas in the tank to rebuilding the carb. The motor seems to starve itself for fuel once it gets running. The only way I can start it is to squirt some fuel down the carb throat and hold the throttle open. It will run at a fast idle but then it runs out of fuel. Are there other issues I should look at besides the carburator? I'm convinced the problem does not lie within.