Recently picked up a NAMCO Express, with a 20hp Kohler Engine (I'm just about ready to slap my 24hp Honda in it). So the other day, I was replaced the coupler, rebuilt the carb. and tried to fire it up with no luck. I checked to see if I had spark, used the spark plug tester and on one side there was spark and the other had none. I replace the ignition module and now both sides have a spark. Although the spark plug tester lights up, it seems dim. I then pulled the spark plug out and grounded it to see if I can see the color of the spark, but no spark either side. I thought the spark plugs went bad so I bought 2 to replace, but again no spark. I put the spark plug tester on and attached the spark plug, and grounded it... the spark plug tester lit up (dim) and no spark at the spark plug. Any help would be greatly appreciated.