I think it is time for a new one.
Normally I am all for running a seldom used tool right into the ground, but in a chainsaw's case, I don't think that is a good road to take. One of those reasons is because quality saws are more then just power and longevity...the better ones have some safety features that the lower cost ones do not. If you are going to be using your saw a lot in the next few months, now may be the time to upgrade.
Does your current saw have a chain whip preventer? What about an inertia hand brake instead of the old contact handbrake? Does your old saw have bucking teeth? Which saw is quieter? Which has more power? All this stuff is related directly to safety.
Hold on you say...you said trading up had nothing to do with power?
Well I do not know of any tool that causes fatigue like a chainsaw. If you get a better saw with more power, you are reducing the fatigue by quite a bit. A loud saw makes you tired as well. Being able to jam your bucking teeth into the log and using lever action to run your bar through the wood rather then relying on upper body strength, reduces fatigue as well. For a really scary trial run, grab your saw like you are felling a tree and whip it backwards really fast. Did the chain brake stop the chain from inertial or did it darn near swing into your leg? Cheaper saws lack this type of chain brake, but better saws work by inertial and not by coming contact into your hand alone.
For the occasional use I can see getting by with what you got, but if you are going to use it a fair amount, you may just want to go to your dealer and ask him to explain all the safety features the new saw has. Compare that to your old saw. Here, every saw shop has a pile of wood out back to test the saw out on. I'm betting if you test saw the two saws you will notice a huge difference in the "fatigue factor."
I've been bit by a chainsaw on two occasions Frank and both times I was pretty humbled by how dangerous these tools really are. Granted my saw had all these features and I still got bitten, but I wonder what the carnage would have been after all these years if my saws had not had these things on them???
Saws loaded with safety features and are designed to reduce fatigue are cheaper then ONE trip to the ER!
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"