Chainsaw knocking sound

[Gord404]

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.

 

[kamp45]

The sound you hear is known as piston slap. It is from a udersized piston or a oversized cylinder. Years ago Echo had a recall on there 50cc saws for that very reason.

 

[cscltd]

Sounds just like some of the certain range of 026’s that come in with exact same sound, sometimes the piston slap noise is louder than the exhaust. Was there a different in the thickness in the piston skit intake vs exhaust side near bottom? Usually a new piston cures it.

 

[cbfarmall]

045s/056s are known for wearing the intake skirt due to the less than stellar air filters and filter location. Spit back is a problem and I imagine piston slap as well. Lots of these saws also had fine mesh filters rather than flocked.

 

[Vintage Engine Repairs]

045s/056s are known for wearing the intake skirt due to the less than stellar air filters and filter location. Spit back is a problem and I imagine piston slap as well. Lots of these saws also had fine mesh filters rather than flocked.

Spot on, had a mesh filter when I got it. I would love to try a new piston seeing as an 08s I’m working on is making the same clinking sound and this skirt is more worn I just can’t find NOS OEM.