On my echo CS-490 with a 20" chain, I keep getting the nose freezing up and stopping the chain.
Seems to be using plenty of oil and nose gear is greased.
Have this on two bars. using good/same bar oil I always use.
Bucking dead ash. It's a pain when halfway through a 15" or so branch and chain stops.
Any ideas what I should look for. One bar is new, only a few hours and never pinched.