Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi,let's see if we can work together to get to the root of your problem! will try my best to help!
Do you have spark on the fouled plug side? Remove spark plug wire, attach a spare spark plug and with it grounded, see if you have good spark when cranking. If it has spark , check the compression against the other cylinder. If both are close to the same, check the intake gasket on the fouled cylinder. Last check the valves on the fouled cylinder for clearance, .006 inch would be about right.
I see question is still open. Did you find a bad coil? Please rate using the 5 star rating to close nad get me credit! Thanks.