I need some advice.

[user 188535]

I bought an 015 off of eBay that runs. However it won't stay idling. It definitely needs a new spark plug. The carburetor is clean as well as the engine. I need advice on the following subjects:

• How to adjust carburetor
• Can I spray WD-40 into an engine that has moisture?
• How to do recoil assembly

Any help would be greatly appreciated as this is my first project saw.