on an empty tank gunge wont come through on a victa as they should have a filter ontop of the tap, the filtewr will strain out any particles that would cause trouble.
try pulling off the air filter tube up near the throttle control and pour a tablespoon of fuel down it, if it fires then, try blocking the air tube with your hand while pulling the rope, if there is a blockage this "may" clear it without pulling the carb to bits.
