Outdoor Power Equipment and Small Engines - Craftsman Chainsaw won't idle

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jbh327
01-16-09, 08:03 PM
I have a Craftsman chainsaw that I can't keep running at idle. It dies instantly when i let off the throttle, or i can bump the throttle down to an idle but it only runs for a few more seconds before dying. I've changed the air filter, plug, gas mix, and diaphram; and checked the fuel lines and filter. They seem fine. It has a Walbro Wt-120 carb. I tried adjusting the low speed idle, but that didn't make much difference. Can anyone give me some ideas on what to try next?

cheese
01-16-09, 10:22 PM
You said you adjusted the low speed idle. I am assuming that means the idle speed screw? It sounds like you might want to open up the low speed mixture screw a little.
Airman
01-17-09, 08:02 AM
At the Walbro link below you can download a manual for your carburetor. In addition to the "WT" manual get the "Diaphragm Carburetors" manual.

Service Manuals (http://wem.walbro.com/distributors/servicemanuals/)

jbh327
01-19-09, 08:12 PM
Looks like I just needed to do alittle more adjusting. Thanks for your help, guys.
BuckRivet
01-23-09, 10:41 AM
make sure the exhaust port/spark arrestor isnt clogged with sawdust etc. too much back pressure will make them not idle