Not a chainsaw but,

[Efisher26]

Stihl bg 86c. Not running good, gas filters clean new carb kit good spark, just sputters and then dies no matter what the carburetor adjustment. Compression is around 107, that’s probably too low correct?


Sent from my iPhone using Tapatalk

 

[HarleyT]

Muffler screen plugged?

 

[cus_deluxe]

the only one i messed with had a severely clogged spark screen, similar sypmtoms.

 

[Efisher26]

You guys are freaking awsome, that was it


Sent from my iPhone using Tapatalk

 

[Wood Doctor]

This is one of the worst designs I have ever seen, I've replaced half a dozen of them. They can be scrub cleaned and reused. It only takes a year or two of typical use to clog them up and completely block the exhaust. Here is one that I cleaned up. It was jet black and air would not even bl;ow through it. Now it's ready for service.

 

[Efisher26]

Ya that’s it, i soaked mine with carb clean then took a torch to it. First pull it ran perfect


Sent from my iPhone using Tapatalk

 

[stihl86]

This is one of the worst designs I have ever seen, I've replaced half a dozen of them. They can be scrub cleaned and reused. It only takes a year or two of typical use to clog them up and completely block the exhaust. Here is one that I cleaned up. It was jet black and air would not even bl;ow through it. Now it's ready for service.
View attachment 755940

Eh....just burn it off with a propane torch. Won't get hot enough to damage the screen or the braze.
They will come perfectly cleanActually the design is quite good.
Some screens get so clogged you cant get them out.
Meaning the flat panel style screen.

 

[Huskybill]

Yup it’s the only thing that went bad on my old husky 240sg, well one fuel line melted too.