New model ut08580 backpack will not start

I have the same problem with my ut08580. When inspecting the carb, I noticed the diapham was torn. I cut a small amount off the corner of the diaphram and set it in the spot of the tear and put it back together. It worked for now, but I would like to order a new diaphram does anyone know how. I've been searching different parts sites for 3 hrs with no luck. I hope I don't have to buy a new carb.

Check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. check the primer bulb for pin holes and seating/sealed properly. if that doesn't work have the carb repaired at a service center or replaced.