Hi Jim.
bit late in replying.
I use my G-Booster 80 in Dubai and have the same issue.
The air temperature is not the issue but the humidity.
If it is a humid day then the G-Booster turbines do not like it and flame out on start up. All sizes are affected here.
I recently returned mine to IQ engines in Germany for retrofitting with a different Nozzle guide vane which is suppossed to cure this issue, still awaiting its return, but hopefully will be ok.
We are coming into our winter now so humidity drops to nothing and the turbine works a treat.
Darryl