You are correct sir! In-line tester showed a “spark problem” AFTER the mower was running for about 15 minutes. Other side tested “normal”. Would your best guess be a coil?
Help please!! Engine cranks instantly and runs perfectly good for about 10-15 minutes. Then, it acts like it is flooding or running on 1 cylinder.
Fuel tank has been cleaned, new fuel pump, new plugs and 1 fellow claims to have cleaned the carb.
After a couple of hours, it will crank perfectly...