She said:
"it started smoking near the push start area"
It seems like for the first report and for the second mention of smoke the poster was not there and getting the report from her daughter. I assumed since there was no mention of unusual smoke from the muffler that the smoke was from the head only - big difference.
So the possibilities are:
It might have been from the muffler only and not so unusual.
It might be that there was smoke going out the muffler AND from the head area on top. The muffler might be loose and smoking. Some smoke might be comming from muffler block connection and going up through carburetor heater box and possibly seeping through the head area.
There might be no unusual smoke out of the muffler and smoke up through the head area which is unusual. Possibly the head is cracked or leaking through the head gasket.