Hi Gord, thanks for the message! I took the top end off and checked it all out. There is wear in the piston but bottom end is all good. Without the muffler I don’t get that same noise so that’s what has led me to believe it’s muffler related. However maybe I’m wrong and it’s not exhaust. Have a listen without the muffler on and let me know your thoughts as to if you can still hear anything.
yes I agree with you, I have a small 170 not in great shape inside that I rarely ever use and when it goes to saw heaven so be it but to me its not worth putting any time or money into and Have a Husky 51 and is rebuilt because it is worth it to me, the 2 saws I use most for firewood are a 372xpg and a 385xp both ported top ends- generally large wood in my area.