also, the ethanol gas beats up the Fuel pump rubber and Needle valve rubber in the carburetor.
Check the Dipstick for Overfull crankcase caused by gas getting past the carb. I just a 782 this Sunday because after I got the machine running for this guy, a month later "it's blowing oil out of everywhere. Come get it, it's yours." I get it home, the oil smells like gas, the dipstick reads very high. I chaneg the oil and fire it up. runs fine. No oil leaks. Closed teh petcock, let it run itself out of gas. DONE