RE: McCulloch 31cc w/ Rear Exaust and Carb, is it better?
Jstanton,
I'm in the middle of doing exactly what your asking... I have the wacker glow adapter, and the flywheel adapter. Both are well made.
I filed the lip around the spark plug off.... this let the adaptor set as deep in the cylinder as the spark plug did. Didn't want to lower the compression.
I mixed 2 parts gasoline to one part glow fuel. (I used 10% nitro / 18% oil glow fuel).
I would recommend using Aeronuts or Av8tor's fuel mix... I think mine has to much oil.
It fires right up with glow power, and I can remove the glow power and she purrs like a kitten.
I had trouble with it until i put in a saito 4stroke plug.
Also had to readjust the high/low needles.... I'm still working this part out, as mine runs rough at WOT.
This has been fun, and what a great idea to forgoe electronic ignition/and the weight!
After I get the WOT issue worked out, I'm going to try porting for more RPM......