Hi Danny and Norm,
If you haven't tried to start the mower it could be a few things ,if it's the needle sticking ,when it stopped you could have put
some fuel in the spark plug hole and if it started then it's a fuel problem , fuel flow can be restricted from a bad fuel filter or
a restricted breather on the fuel cap.
Spark plugs can fail when they get hot and even new plugs fail occasionally.
Cheers
Max.