For the love of Jesus someone get her a new chain for that chain saw!!!!!!!!!!!!!!!!!!!!!!!!!!!  I know that not everyone,  probably most people have never ever touched a chainsaw, I am not one of those people.  If you look at this video at about 1 minute in the sweet angel is attempting to go thru a 6 inch limb....notice there is no wood being removed from the cut?  The older Mac10-10 that I've had for going on 40 years would go thru that in about 4-5 seconds.  That saw she has has a very dull chain and should replaced,  I wish I could teleport down there and at least sharpen it for her,  she is burning fuel and breathing a lot of smoke..................When a chain saw has a good chain it should be shooting out the cut wood like a fountain,  2-3"wood strips flying out the base of the chain.

http://insider.foxnews.com/2017/09/13/miami-nun-chainsaws-tree-felled-hurricane-irma-florida

Mine doesn't have the yellow safety bar. Manual oil pump and 10Hp.