I had this problem for a very long time. If my Orion was driven every day,
it was fine, but if it was left for a day or two and then driven, as soon as
the engine got warm, it would conk out on me. This was a very frustrating
problem, but turns out it was all down to a fautly coil. I swapped a
new(er!) one in, and hey presto!, no more problem.
Just wanted to to put this there incase anyone else was experiencing the