it seems that your starter motor is damaged or something.. or engine has soo big compression?
Compression ratio, something about 11...11.5. Starter motor is ok, but it old style starter, it has no reductor.
Temperature of engine at startup is -18'C.
Battery is new, but it little freezes too...
The filter would help to solve these problems, but it seems that it does not work on 60-2.
I would like to know if I'm right. Trying to set up a filter is meaningless? It is absolutely excluded from 60-2 configuration in the firmware?