Good evening Scotty, i just tried my engine a while ago.....from an orion plug to a o.s p6 plug....this is what happened.....the engine was running good at the tracks i play on but after a few laps the engine stops. a fter a few tanks still the same.for 1 tank of fuel i think the engine stopped 3-4 times.restarting wasn't a problem.i also checked for leaks on the engine specifically on the button head where the plug is,there was none. i shifted fuel to 30% and it ran much better and had less number of times engine dying than when i used 25%.the temp readings i get are from 190-224F.......i asked help from a fellow player to look at my needle settings if they were ok.he told me i was running on the rich side. so i leaned the hsn about 1 hr on the lean side but still the engine dies on me.what would you recommend i do?thank you again.