The diaphragms are different in the specific kart carburetors but the diaphragms are all the same for the saws.
Mark
That seems to be what I've found out, which is great for me.
In the mean time, I found out why the previous owner stopped running the saw. Not only was the tank about 1/4 full of sawdust, but the fuel filter was sitting on the bottom of the tank... Along with a different fuel filter. So, I decided to tear everything apart and repaint/regasket everything.