Ignition coil Arcing

Forum: 

My rockys ignition coil has been acring ( sparking ) over the the coil body from the boot of the plug. Sometimes so bad that the battery drains. I dont see any cracks in the plug. Any thoughts on what this may be?

Leads

Most likely a microscopic crack in the insulation ot boot, or tracking through a conductor such as oil or grease on the coil.