well, the oil in the fuel tanks was actually bar oil. I dumped it and rinsed the fuel tank out several times with premix. nothing nasty came out. saw wouldn't start until I put a little premix in the spark plug hole. fired right up and ran great for like 5 seconds. did that several times but it dies and won't restart. need to figure out what carb I have and order a carb kit, some new duckbills. may have some bar oil in the carb or fuel line. when I cleaned the fuel tank the stone fuel line filter in the tank came off. did not see and signs of bar oil goo in the filter or line at the tank end. when I pull the covers off to look at the carb, will look at the air filter. I think this little guy is a runner.