Stihl 031AV Help

[Spiderman69]

I have a Stihl 031AV chainsaw that will only run when I put carburetor cleaner in the carburetor it will run for a moment and then stop I replaced the fuel lines the fuel filter the carburetor and to no avail so I'm at a loss now if anyone could help me I'd really appreciate it thank you in advance for all your help

[spudulike]

You have pretty much answered your own question. The saw isn't fuelling correctly so you need to inspect the fuel system so we are talking fuel filter, fuel line (not split), the carb (diaphragms and gauze strainer) and the impulse line. The most common issue on an old saw is a split fuel line, clogged gauze strainer or hardened diaphragm.

The only caveat to this is that a BIG air leak in the engine can stop fuel vapour being pulled in to the engine but is less likely.