Yeah Bigcol ......Seems like a lot of the Patrols run better on gas than petrol. The 2 I've owned seem to run smoother. The previous TB42 had way less power on gas, but the new TB42E with impco gas seems to go great - don't know what it runs like on petrol yet, the pump is on my bench at the moment, it would idle sweet but just backfire and cough if you tried to drive it on petrol.
I wasn't saying the Troll would overheat if you ran it on gas - just that engines running gas generally run hotter than running petrol.