Well, my Earthquake running problems continued this weekend, but are now fixed. I had recently reinstalled the stock Earthquake flywheel and coil due to difficult starting/flooding, and that seemed to fix it. But this weekend it was inconsistent - I just could not tune it. I'd get it right but then the idle speed would be all over the map, sometimes it would bog and sometimes rev right up. I messed with it for a tank while clearing brush, but then set it aside. I cleaned the Walbro carb I had in there (nothing obvious wrong), and then it would not start - the plug was dry. A little fuel down the throat and it would fire.
So I replaced the diaphragm, but the results were the same. I checked all the passages and could not find it. By then it was dark so I left it for the morning - whereupon it started right up! And still ran like crap. I decided to try putting the original carb back in - it is a better carb anyway, as it has a fixed main jet in addition to the needle, which allows more acrruate adjustment. The problem was that the check valve had failed, but I was able to repair that (I started a thread on that). Now it's running great, and the saw is returning to more Earthquake parts!
I dislodged and dropped a 14" ash snag, and bucked it up with no issues.
It usually never leaks a drop. It turns out it was the cap - they put an O-ring on there as a seal, but the case was clearly designed for a flat rubber washer. I made something up that works for now, but I have to find my sheet of rubber or an old innertube to make a more permanent piece.
