Nice condition, little use and well looked after.
All good but it has lost 1/2 of its spark

I am in the process of getting my head round the electrics, there is a stator coil under the flywheel for lighting and a charge coil, also a firing sensor.
Then out side you have a power pack, and 2 further coils.

Both external coils work if fired from the working supply from the power pack.
Does this mean that the three coils are OK and the sensor is OK.
So the fault is in the power pack?
Anyone had an Evinrude/Johnson twin with only 1 spark?
H-A