Here is the oscilloscope waveform of the Victa 160 ignition coil:

The secondary voltage is only producing a maximum of 2.4kV and isn't producing a proper voltage spike.

Generally, the operating output voltage of a small engine coil is up to 6kV, depending on resistance in the HT lead, plug gap etc.

The blue trace is the ignition primary voltage.

The red trace is the ignition secondary voltage.

The green trace is the ignition primary current.

In another post I'll illustrate what the ignition secondary waveform should look like.

[Linked Image]