Someone explain the carb adjust screws on Stihl chainsaws

[BJE80]

I took apart my MS 250 over the weekend and gave it a once over. Changed the air filter, fuel filter and fuel line hose. Now it runs way too fast at idle to the point the chain doesn't stop. My saw is over 10 years old. I've had it in before and I belive they mentioned they turned the idle up then. I guess now that I've cleaned everything out it is making it go too fast? There are two screws and I want to slow down the idle. What do they mean?

 

[wiscwhip]

You should have 3 screws, not 2. One marked "H", for high speed, one marked "L", for low speed and one marked "LA", which is your low speed air adjustment for idle. There are very good and simple directions on page 41 of your MS 250 owners manual, if you don't have one, follow the link below:

http://www.stihlusa.com/WebContent/...ls/STIHL-MS-250-Owners-Instruction-Manual.pdf

Good luck.

 

[Terrific_tom]

Here's a youtube video.

 

[BJE80]

You should have 3 screws, not 2. One marked "H", for high speed, one marked "L", for low speed and one marked "LA", which is your low speed air adjustment for idle. There are very good and simple directions on page 41 of your MS 250 owners manual, if you don't have one, follow the link below:

http://www.stihlusa.com/WebContent/...ls/STIHL-MS-250-Owners-Instruction-Manual.pdf

Good luck.

Ahhh yes. I think there is 3 screws there. I'll read up here in a bit. Thanks for the help.

 

[j-bird]

I took apart my MS 250 over the weekend and gave it a once over. Changed the air filter, fuel filter and fuel line hose. Now it runs way too fast at idle to the point the chain doesn't stop. My saw is over 10 years old. I've had it in before and I belive they mentioned they turned the idle up then. I guess now that I've cleaned everything out it is making it go too fast? There are two screws and I want to slow down the idle. What do they mean?

You adjust them = your screwed!!!!:D

No not really - just couldn't pass it up.