OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Chainsaws and Concrete Cutters Petrol Chainsaws and Concrete Cutters Stihl 024AV

Found a Stihl 024 on a country tip. It has plenty of compression and after replacing the plug and giving it a dose of fuel via the plug hole, away she went. After that starts first pull every time whilst it is warm but after being left for a while will not start from cold without the fuel dose down the plug hole!!!!!
Reluctant to tackle the carby and puzzled by screw adjusters on the side which are marked "H" "L" and "LA". Any advice would be welcome.

Are you using the choke to start it from cold? Getting just the right amount of choke can be difficult, so most people follow the chainsaw system. You close the choke completely, pull it a couple of times until it burps (runs for a second then stops), then you half-open the choke and it should start first pull.

If there is no way to get it to start using that technique, there is a good chance that it needs new carburetor diaphragms. In general, as the diaphragms get older the starting technique gets more critical.

There will be three screws with springs under their heads on the carburetor. One will be marked "H" (high speed mixture adjustment), one will be marked "L" (low speed/idle mixture adjustment) and one won't be marked but is the idle speed adjustment. You will be able to see that one move the throttle butterfly when you adjust it - it acts as the throttle stop.

Thanks Grumpy

Had another fiddle with it and found the air cleaner had a wire caught under it which prevented the choke working. Now starts and runs well except it idles too fast. Will tweak the idle adjustment screw tomorrow.

Jim

Thanks for keeping us posted, Jim. My impression is that the Stihl 024 was an excellent machine, so probably someone had messed about with it to cause that fault in the choke linkage. It should be fixable rather than just sortable, to make it as good, and as easy to use, as a new one.

I'll close this thread.