sld961
Addicted to ArboristSite
I bought an MS 261 CM not too long ago. It starts up, runs good. It has 160 psi compression. I started the process of selling it because I need the money. I pulled the muffler off to take some pics of the piston and was surprised to see that most of the piston is a dark color, as if it is stained by oil or carbon.
I looked at the top of the piston and there is not any carbon buildup. I thought that maybe the rings were sticking and that it was caused by blowby, but with 160 psi, is that likely?
At this point, I'm thinking that the previous owner just used too much oil in his mix. If a good quality synthetic oil is used at the right ratio, this should clean up over time, right? There is no scoring that I can see and the machine marks are visible through the staining.
What are your thoughts? I'll add pics in the next post.
I looked at the top of the piston and there is not any carbon buildup. I thought that maybe the rings were sticking and that it was caused by blowby, but with 160 psi, is that likely?
At this point, I'm thinking that the previous owner just used too much oil in his mix. If a good quality synthetic oil is used at the right ratio, this should clean up over time, right? There is no scoring that I can see and the machine marks are visible through the staining.
What are your thoughts? I'll add pics in the next post.