Hartley Oscillator Alternate Oscillation Mode
I have simulated the circuit with the following modifications:

1.) Remove C2

2.) Upper part of L1 with 30µH and lower part with 70µH. 

As expected, the circuit oscillates at app. 16 kHz. I suppose, the gain (with C2) is too large - driving the BJT into severe saturation. As a consequence, undesired effects (storage times etc.) have an influence and inhibit correct operation. It should be your goal to fulfill the Barkhausen condition for oscillation with a loop gain (transistor gain multiplied by the inductance ratio) which is only slightly larger than unity. 

EDIT: I have to correct my self - sorry.  For my first simulation I have used an idealized transistor model - now, with a real model I couldn`t achieve self-sustained oscillations.  Perhaps the loading of the resonant circuit is to heavy?