I scanned the pages from my Kohler manual for the smart spark, see attached. Sorry for the page orientation, the manual is a bound book and would only go one way into the scanner. Hopefully this helps your mechanic.AUTOMOTIVE SERVICES . Sparks Affordable Automotive in N. St. Paul, MN is your trusted, local, complete car care and auto repair provider. We are a family-operated business and we offer services including, but not limited to oil changes, tune-ups, brake services, alignments, transmission service, air conditioning repair, heating repair, and so much more. To check for a spark, remove the spark plug from the cylinder, hold the tip of the plug against the cylinder head and crank the engine. You should see a spark across the gap. If you don't, there's a problem with the ignition. Could be a faulty coil or electronic ignition module which will have to be replaced, or it could just be a lose wire.