"Chris Selwyn-Smith" wrote in
message . 254.254...
"Alan" wrote in news:1126626730.822726.93670
@g44g2000cwa.googlegroups.com:

Not neccersarily the solution to your problem but a lot of Stihl machines
have a gauze spark arrestor in the exhaust that after a time can clog this
will lead to loss of power and stalling

Chris


And people often take the _crankcase_ compression for granted.

Sylvain.