Re: no compression

Posted by Fish'n Jim On 2014/5/28 15:26:11

Unless you want a blue plume, I'd forego the 2 cycle oil mix. That'll upset the fuel/air ratio and cause more soot.
My guess would be that the oil runs are plugging off, and/or sludge is building up. Weak springs or excessive wear(sloppy) would be next. Non-roller lifters after long abuse can "mushroom" over at the cam end and get stuck if over revved. Another reason to get rid of the carb starters. Since it's seems like more than just one cylinder, because it would fire off with a couple cylinders out, I'd change the oil, clean the pan, and adjust the valves and not worry about the gas... If it continues, then it's overhaulin time. Oil degrades more than gas sitting around since it's already contaminated. Ethanol fuel is another story, mostly water pickup/corrosion issues.