Fireplaces, Heating Stoves, Flues and Chimneys - Pilot light = too small

My natural gas fire place does not seem to be starting for this winter season. I have narrowed down the problem to the pilot light. It does not seem large enough to fully engulf the thermocouple, meaning I am not getting enough mV (only 100, compared to what we are supposed to get which is over 300) to keep the pilot light on. So, I am wondering how to increase the size of the pilot light. I have already tried running a wire through the thing that the gas comes out of to clean it out, still the flame is far too small. Any help?

Does the size of the pilot change after burning for a while? The positioning of the flame and thermocouple form the Oxygen Depletion Sensor. If the flame starts large and then gets small then there could be a serious problem with combustion. For this reason there is normally no adjustments possible to the pilot. If you look closely, the thermocouple has a flange that prevents adjustment. If the above is true, a professional should be consulted.

If the flame is never large enough to reach the thermocouple then look for blockage of the pilot assembly. A vacuum cleaner can remove dust and cob webs. Just be careful not to damage the pilot assembly. If the flame is still small then a pro should be contacted.

Just to be sure, you said that the flame didn't engulf the thermocouple. Descriptions can be misleading so here is my take. Only the tip of the thermocouple should touch the flame. By that I mean that only about 1/8 inch should be in the flame. This is also part of the ODS and is critical for proper operation. If this is the case then there is a problem with the thermocouple or associated coil. Quite often there is simply a bad connection where the thermocouple connects to the gas valve.