Hi Norm,
If it's not a fuel problem it sounds like an electrical problem ,when the electrical side starts to fail it warms up and then cuts out then when it cools starts again gets warm and stops.
I've had this sometimes when the 3 starter bolts are loose ,otherwise make sure the spark plug is good ,I would try another module first and
if that doesn't fix it change the coil.
Cheers
Max.
