I have the following engine in my ride on mower https://www.engine-specs.net/briggs-and-stratton/40h777.html a 40H777 22HP V-twin and I can't get it running smooth. I have replaced the following with no success in fixing the problem. What am I missing?
carburetor
fuel pump
fuel filter
air filter
spark plugs
ignition coils
added new fuel
I confirmed vapor lock is not the problem by taking fuel cap off as the mower was stalling after running it for 30 mins before replacing all of the parts above.
I did find that when I run the mower and disconnect either one of the spark plug cables from the spark plug the sputtering stops. Does this mean anything?