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.

 

[chrisev]

Bob that's great. Nice to find someone that knows a bit about it as I cant find anything on Google. Please assume I am a complete novice, and have no idea which adjusters are which!

With your info, Chat GPT tells me what H&L means and how to adjust

But there are a few other adjusters

Is there a a diagram somewhere that shows all this information or should I post picture of the various unknown adjusting screws?

I have filled it with fresh petrol/oil. It fires up and responds pretty will to the throttle, revving well, but perhaps not to very high revs. It will also tick over a bit but soon dies. Once it fires up should I take the choke off immediately. I had it about half on and it may be flooding.

My aim is to get it running nicely and to ensure any safety features are operating.

 

[Bob Hedgecutter]

Cold start- apply full choke, pull starter until first "pop" as saw fires- move master control to half choke/fast idle, start saw- once running flick master control to the "run" position immediately.
Not quite that easy with the old 020 model and the choke not really part of the carb, but a flap behind the air filter- but the same kind of method.

If you have to keep the choke half closed I am guessing either the tuning is off or there is an air leak in the system and blocking half the air intake is compensating for that leak- IF it will not run happily with the choke fully disengaged.

 

[Bob Hedgecutter]

But there are a few other adjusters

Is there a a diagram somewhere that shows all this information or should I post picture of the various unknown adjusting screws?

Few other adjustments? There are only 3 screws for tuning- the High the Low and the idle speed screw.

I have all the manuals for the 020 somewhere in a box- but they will be on the internet somewhere in PDF form- search 020AV owners manual, or 020T.

 

[chrisev]

Google searching continues

 

[Bob Hedgecutter]

Don't bother with the Stihl site- just go to open internet- it will be there somewhere.
Stihl pretty much drop anything that was not current 15 years ago, it becomes unsupported- the 020AV is WAY older than 15 years.
If you are unsure what the H&L are and which screws hold panels, which adjust mixture- please download the owners manual and read it!
If you try and guess your way through things- bad things will happen.