Not sure if it's the same model, but parts look the same.
I followed the help in there, replaced the diaphragm and air filter. If I prime the engine, it'll rev up to really fast, and run 15-30 seconds, even on only 1-2 pumps. But it won't stay on.
What else do I have to do? I don't want to have to buy a new mower for something simple like this.