Stihl Carburetor Parts

https://www.stihlusa.com/information/how-to-guides/outdoor-power-tool-extended-storage-tips/
Straight from Stihl's own website:
Empty the fuel tank. After the tank is empty, if it has a primer bulb, pump the bulb until dry, then replace the cap and start the engine – otherwise, just start the engine. Run it at idle until the engine stops. It is important that the engine is run only at idle speed, so there will be lubrication in the system. Do not operate the throttle or "rev" the engine. Just let it idle until it stops. On a chainsaw, engage the chain brake.