Stihl MS 211/c idle issue

[John Rainford]

I've learnt a bit about my saw from spudulike and others who have helped me solve a couple of issues over the years. I have succesfully stripped the saw right down to a minimum , replaced the crank seals and put it back together, as well as other easier things. I have a new issue at the moment which I need to solve and am having problems with it. The saw starts fine, idles for a minute or two and then cuts out. I did a bit of research on "Steves small engine saloon" on you tube and tried a few things, but no success yet.

Cleaned the plug and the air filter

Checked the h and l screws were correctly positioned

Pulled the carb and used carb cleaner to blow through the internals, as well as inspecting the Diaphragm

While it was idling, I turned the idle screw in, expecting the revs to increase and at some point the chain to start moving. However, I turned the idle screw all the way in and the revs failed to increase and the chain did not start moving.

 

I am thinking of buying a new service kit and trying fresh fuel. It's time for a service anyway.

 

Any help with diagnosis would be appreciated.

[Stubby]

7 hours ago, John Rainford said:

I've learnt a bit about my saw from spudulike and others who have helped me solve a couple of issues over the years. I have succesfully stripped the saw right down to a minimum , replaced the crank seals and put it back together, as well as other easier things. I have a new issue at the moment which I need to solve and am having problems with it. The saw starts fine, idles for a minute or two and then cuts out. I did a bit of research on "Steves small engine saloon" on you tube and tried a few things, but no success yet.

Cleaned the plug and the air filter

Checked the h and l screws were correctly positioned

Pulled the carb and used carb cleaner to blow through the internals, as well as inspecting the Diaphragm

While it was idling, I turned the idle screw in, expecting the revs to increase and at some point the chain to start moving. However, I turned the idle screw all the way in and the revs failed to increase and the chain did not start moving.

 

I am thinking of buying a new service kit and trying fresh fuel. It's time for a service anyway.

 

Any help with diagnosis would be appreciated.

@spudulike

[spudulike]

Has the L screw still got the rev limiter fitted on it? If the L screw is turned in fully, the saw revs should rise and then die. If it doesn't do this, I would suspect an air leak.