This was a tougher one. The saw came in rough. Missing filter cover, muffler and burnt up oil tank from running no muffler. Parts for these are difficult to find at best, luckily member kr5258 had one with a banged up piston. Swapped the tank/handle over, when I took the tank off mine I found almost all the antivibe bushings were broke, luckily the donor saw had all good ones. I rebuilt the injection tilly carb and new lines/ filter. No good. Would not draw fuel to the carb. Compression is great no kinks in lines pulse passage clear. Re check carb, clean metering lever correct. Check tank vent seems ok. Wound up swapping carb from parts saw and it popped. Reset h/l to one turn out and this saw rips. Very strong, I plan on putting a 24"on it and run it along with my 540. I also added the spike from the donor saw on the clutch cover. I've always thought dollars were smartly engineered, making a spike that can mount in or out is evident of that.