Couple of possibilities. Newe models have an air vent line coming out of the tank with a white object at the end. Looks like a filter. Could be plugged. With the gas cap on tight, it won't pass fuel. Older ones have a tank vent. Same issue.
Make sure you have the fuel supply and return lines connected correctly. If they get switched, you'll be sucking air from the tank.
I just bought a whole new carb for a neighbor's Mantis. $10.95. Free shipping off of ebay. Works wonderful.
Make sure you have the fuel supply and return lines connected correctly. If they get switched, you'll be sucking air from the tank.
I just bought a whole new carb for a neighbor's Mantis. $10.95. Free shipping off of ebay. Works wonderful.