litefoot
Addicted to ArboristSite
I posted on a different thread about my problems rebuilding a 440. I had debris still in the crank I had not totally cleaned out which scratched up a brand new OEM piston. I tore down the saw, cleaned out the crankcase (thoroughly, I thought), buffed out the piston scratches and all was fine until today. Tried to start the saw. Rope got stuck. Took off the muffler...more black debris. Here's pic of what was in the muffler. It's not carbon and no the nickel wasn't in there.
And a view looking down into the crank.
This saw had a toasted p&c when I acquired it. What do you think this is? Is there a bearing disintegrating down there. I see more flecks of the black stuff in the crank case. I removed about the same amount of debris the first time. Another question? How much lateral movement should that connecting rod have on the crankshaft bearing? Thanks everyone. I'm tired of tearing down this saw over and over....but realistically, I'm afraid I'm looking at maybe splitting the case to get to the bottom of this.
And a view looking down into the crank.
This saw had a toasted p&c when I acquired it. What do you think this is? Is there a bearing disintegrating down there. I see more flecks of the black stuff in the crank case. I removed about the same amount of debris the first time. Another question? How much lateral movement should that connecting rod have on the crankshaft bearing? Thanks everyone. I'm tired of tearing down this saw over and over....but realistically, I'm afraid I'm looking at maybe splitting the case to get to the bottom of this.