I was reading about my Chainsaw online and wondering how I can tell if mine has a screen that might need cleaning. I replaced all the fuel lines which had disintegrated some in the fuel tank do not know how long it has been like that so do not know how much crud would of gone thru to the carb. It was staving for fuel (for obvious reasons) but would not idle either way and still does not before I go adjusting the fuel mix and idle screws I want to make sure there is know screen in carb I need to clean first ?

Jim Crowley, June 2016

Well got it running tryed to setup up fuel mixture So I could set idle(kept not wanting to idle) then all of a sudden nothing chased problem and the coil stopped working . Now I need a coil and do not know if it is worth spending more money on when I can get a new stihl for 150 bucks .

Jim Crowley, June 2016

How can you tell? Do a search online for the manuals (Owners and service) and read them.

Try these:

http://s30387.gridserver.com/partsDiagrams/McCulloch%20Late%20models.pdf

http://lawnandgarden.manualsonline.com/manuals/mfg/mcculloch/mc3516.html?p=1

Anon, June 2016