Newman
Well-Known OPE Member
Disaster has struck my big Husky chainsaw which I acquired 10 years ago. I am new to your site, but have seen a lot of expertise available to members seeking help and opinions in situations like my current dilemma. As you say, "find out why it failed before you just start putting in new parts". Please see attached pictures. It appears to me that the saw was running plenty rich, looking at the spark plug deposits and the carbon on the piston top. The fuel line is in poor shape, some cracks. I had not used the saw in about a years time..new fuel was just mixed before using the saw on this day. The saw was running great after about 5 cuts through a 3 foot diameter cottonwood log. Then it lost power and would not rev up, the fuel tank was about half full, I suspected the crack in the fuel line which I didn't discover until I disassembled the saw, may have become exposed in the half empty tank, thus causing fuel starvation, lean mixture and resulting piston scoring. But the damage to the piston and rings looks more like (foreign object damage) than heat damage. Scoring is all the way from top to bottom, and the steel rings did cut some tiny grooves in the hardened cylinder wall. I have ordered a new piston from the DLA site in Greece. Plus a new fuel line. Any opinions on what else I should check or change before destroying another piston? I think this is a 1979 saw, not sure, since it is also an early XP model.
Thanks for all your help..
Thanks for all your help..