Ok I have the bottom of the mixer off, I see no number on the diaphragm.

It does have a new ignition coil. I'm not sure if it has a built in resistor or not, it doesn't have an external resistor. I do have good spark now and it runs much smoother. Still just will not run anything over idle without partially covering the intake. It will idle without that but it idles nicer if you do partially cover the intake.