well, I was looking for more of a SYMPTOM sort of thing, thinking someone MUST have had this happen
I was thinking rings, then a head gasket...but its looking like it was a clogged air filter. The machine would start and purr, but after a few minutes, would begin to sputter and puff blue smoke with each sputter. I noticed quite a bit of oil build up in the air cleaner housing....made me curious. I wrapped the air intake with an old clean shirt and let it run for 15 min..NO sputtering, NO blue smoke. And when I placed the air cleaner back on, it slammed back down from suction...telling me nothing is getting pulled through the filter and a LOT of oil and exhaust is getting pulled up into the carb from the vent. Could It be that simple??
Ed