Absolutely. I'm going to give you a link to a zip file with several screenshots (can't figure out how to upload them here and imgur won't let me upload because file sizes are too big). The first proves that I have enough radiators, the second is the reactor info window, showing that it's generating power, the third is the thermal generator, fourth and fifth are the engine itself, one after just activating and the other after activating and timewarping a couple hours. As you can see, the engine has everything it needs, it just refuses to consume fuel for some odd reason.
https://mega.nz/#!npY2haAR!1xHQS7pdRyHrTDW1xNG_lj68z7yJH1Lb5bG2lBpROno
Glad to see this is not localized to my install. Try the thermal launch nozzle, has the same problem for me.