You have found a leak. I have found that using
the Merc O Tronic, to test the ignition this way
has been the biggest benefit of having the device.
Several times, after having a motor that wouldn’t
start, I found a leak testing the coil this way.
Tubs
Tubs, I expected I had a “leak”, so I separated the coils again,
and retested them on the Stevens, using the “Probe” to check
for leaks…… no leaks found though.
The “glow” and buzzing under the coils may have been from the
secondary from the buzz coil being directly grounded to the mag
plate, as Tom M. suggested. I haven’t had time to play today yet,
but heading to the garage soon.
Prepare to be boarded!