We visited the idea of pressuring the tank from the pipe on the gas r/c boats. The walbro carbs have a fuel pump built in so there was really no benifit or advantage of using it. One thing to consider is if this is used for example on a plane and the plane quits running in flight is the tank will depressure back into the hot muffler. A inline check valve would be a must but if the carb has a built in fuel pump there is really no advantage.

Jeff