Right now I'm running a single 930 concentric, so I'm not sure why 1 cylinder would be running richer than the other. The only thing I can think of is if the right cylinder has lower compression and not combusting the fuel all the way? Does that cylinder maybe just need to be decarbonized?Scottie
It'll be fun!
Run some Marvel Mystery Oil, Seafoam, or TCP or some other combustion chamber cleaner stuff through a tank or two and see if that cleans it up. easier to pour a few ounces of that in the gas than tear it down!Bare