I changed the belt and rollers, which made a little difference, but very little. I've had some just sluggishness as of late. So I pulled the plug, and it's darker than it should be.
I'm about to run out for some new plugs and then I've got to get my mixture right. I never messed with it, and apparently nobody else did when it was sent from Florida to Kansas. Also could explain why I consistently get lower mileage than other LEADER engine folks I know.