Chainsaw Repair

I should have known better, but I offered and left the old rebuilt 3750 behind other day.   Hoping to get some more run time on it to break it in.
Me and 660mag was cutting up some test wood one day and on the way home I stopped at a friends place to BS. Well while I was there his landlord ask me to muffler mod and sharpen his chains for his 310.
Well I exchanged saws and he said the poulan wasnt running right and had to be run on half choke. 

 So guys what does it do to a saw that is being used in cuts on ash run on half choke when not running right?











First thing I looked at after carb adjustments was IMPULSE line which had come off.  Put it back on it it seemed to run fine with 140psi. Still I want to know more. Took muffler off and some scoring on new ring hmmmm. So I pulled it down ad even found a small corner piece off the skirt on 1 exhaust corner missing.

To end all. Then noticed the tensioner bolt missing.

 Nuff said on my part and LESSON learned if you dont know the chainsaw operators skill levels.