looks like you have this model...
Up button for temp increase.
1/4 turn adjustment if near optimal setting is not a good recommendation, it very well may not make it through that next cut.
Start with cold saw.
90 sec on choke, move switch to off without touching throttle.
Move switch to run, start and idle for 90 sec, cut wood.
Stock saws require carb tuning also.
Learn that first.
Large o ring is a #425, small one inside is a #329
That part there in red, did you try the plug?
How many board ft cut?
Did you have the oil pump gear on the crank when you tightened the bolts on the oil pump?
I've had a 131r since they were 1st offered, no babying for break in is needed. Run the valves after the 1st season and you'll be good.
How thick was the b card you set the coil gap with.
How long did it warm up first?
You may have cold scored it at 10 deg.
Pull the muffler and have a look.
Were you cutting with it when it quit? B4 the coil replacement?
Looks to be an EK308, single stage cylinder model.
Clean both surfaces and apply a thin coat of threebond.
Separate names with a comma.