Ignition or Carb problem

Also, how strong or bright is everyone’s spark. I had to close my hangar doors to see the spark rel goog. 

Spark isn't real bright. So yours sounds normal.

Roger is correct, it is difficult to see.  

You can't see it normally, especially in bright light.  This is because if is far faster than a magneto ignition spark as we see in a conventional aircraft engine.  The CDI spark snaps very fast resulting in a very thin blue spark.  The rise time of the conventional magnito is much slower resulting in a far more visible (fat) spark.  The discharge voltage is about the same. 

Cheers