Stihl 020AV Super chainsaw

[chrisev]

I have acquired the above Stihl chainsaw which looks in good nick. I have adjusted the chain and it fires up but will only run for about 20 seconds. Where can I find info on starting procedure and adjustments like tick over.

I am in the UK
Thanks

 

[Bob Hedgecutter]

Idles for 20 seconds, starts, idles and goes up to full throttle for 20 seconds?

H&L should be around 1 turn out from lightly seated- idle screw can go in as far as you like and then adjusted once running to a speed the clutch disengages and the chain stops rotating.
Generally, if a saw does not pop on full choke after 3-5 rope pulls, then not fire up on half choke/fast idle on the next 2 or 3- you have other issues.
With an old 020AV, I would be thinking air leak.