Someone just gave me a well-used, not terribly banged up, Stihl 028. It's been through a couple hands to get to me, but not used on transit so I don't really have any history on it. I have yet to get it running. The fuel smells a little rancid, but not too bad. It has a fairly new bar and chain so I'm assuming it was running when it got shelved. I checked the compression -- at about 65#. Does it have a compression release engaged?--or is it just worn out? I sprayed a bit of starter fluid in it to see if it would fire -- no joy. If it is worn beyond running is it worth putting a new top end on it? The bearings feel smooth so it might not need a full going through.