Hello everyone! I recently purchased a demo, low time, propane-start JetCat P-70 turbine to put in an extra Boomerang jet. I installed the turbine, re-calibrated the temperature prob, and re-learned the ECU. On my first run, the engine started perfect, although running temperatures were from 780 - 850 degrees. I shutdown the turbine, let it cool, and re-calibrated the temperature prob. I attempted to start the turbine again. About 1 minute after the start sequence was complete, the running temperature exceeded 860 degrees and the engine shutdown. All subsequent start-up attempts have resulted in a shutdown due to overheating. I am not convinced that it is truly overheating, but that is what is being reported. Any ideas?

Chris Wilson

Did you switch fuel jugs?

Have you checked the position of the temp probe in the tailcone?

Is it possible you dinged the temp probe while fastening the motor to the bracket??? They are not expensive and easy to replace, i would try that first.
Vin...

use a pair of needle nose pliers and pull out the EGT probe some and restart, if the turbine starts and is running to cold around 400 degrees then push it in a little bit at a time till you idle temp is around 550-590 degrees roughly. If when you start it is still hot keep pulling it out a little at a time until you get to a good temp. Try that it should work, sometimes when engines are shipped the EGT get pushed in and cause a little bit of a problem

All mine run the best with the probe about .062 sticking inside the cone!!! FWIW. Good luck to ya!!!

HI, did you switch ECU's, their are 2 versions, analog and smart chip.
Rcpete

I remember reading somewhere that JC advise not to recalibrate the temp as it can cause problems, I suspect that maybe the problem, try the JC forum, may help.