I have a PM 610 sitting in my shop. I got it running a year or so ago, but it is to heavy to do much with it. I also have an XL-12 but don’t use it for the same reason. If I want to cut something I grab my Stihl 021 or 024. If I need some real grunt I grab my MS 260 Pro or my 026 Pro. After toting all those boat anchors you usually tote the Pro MAC probably feels light but it ain’t. Mine weighs 21.25# and my Homelite weighs 20#, go figure.
I just pulled one from the trash! It has great compression but missing top air filter cover and pulley cover plan to get it running regardless. Curious do you know how to date them? Mine looks exactly like yours. And did yours run when you got it or did you rebuild carb?
No it has both high and low. Since the carb is mounted "vertically" one is on top of the other, lowest is "low speed", upper a conventional high speed :)