hello
i have a 73 inch wing hanger 9 cap with a mds 148 with a pitts muffler on it. it has all new fuel lines. i can prime the engine over and fuel gets to the carb. it will start after about 2 turns and run for a few seconds but then quits. it seems as though it runs out of fuel, when i open the carb the fuel runs back to the tank. the tank is a little below the carb but their is no other place to mount the tank. it seems to me that when started it should continue to run because the tank should be pressurized at this time. i think their was a prob with the older mds carbs but im not sure. the engine is mounted sideways as per instructions, and their doesnt appear to be any leaks. turning the engine downwards doesnt look like it would change the position of the carb any.
any help would be appreciated
thx
robert