Hello all, I have a stihl 066 or a stihl 064. I can not ID which one it is. But i did writhe the serial number down, it is 122058766. Can any one tell me year and model from this? I didn't take off the clutch drum to see how the oil pump mounted. I also have a crack in the crank case (see pictures). The saw runs like new, with no flaws. There is no pressure coming from the crackcase. Can I have this thing tig welded with 1/8" magnesium tig welding rod?? Or what other options do I have besides replacing the crank case. Need to fix this on on the cheap if I can. If I have to replace the case I might as well do a total rebuild, and that is more than I am mechanically inclined to do. I have never split a case before. There is a guy in my area that does chainsaw work, however he quotes one price, and by the time he's finished it more than he quoted (like to stay away from those)! I hear $40 per hour is a good rate, but 6 hours is $240 in just labor.... But any way, Does anyone have a service manual? Please give me any suggestions that may help fix this crack in the crankcase, and any ID information. Thanks in advance.