I'm thoroughly confused after cross referencing plugs this afternoon. I pulled up the manual for my Champion generator, model 46555 and the manual says to use NGK BR6ES (notice the lack of a "P" between the "B" and "R"). The Torch plug that came out of my generator from factory was model F6RTC. When you cross reference the Torch F6RTC on either of the NGK or Champion websites you get the NGK BPR6ES or the Champion RN9YC. The NGK BR6ES cross references to the Champion RN4C. These are obviously different plugs, so I am confused. Do I go with the BR6ES stated in the manual, or the cross referenced Torch F6RTC equivalent which is the NGK BPR6ES or Champion RN9YC?? For the record I put in a BR7ES in the generator and she's running like a champ (I couldn't find the BR6ES and decided to go one step cooler as a stop gap to get the generator running). However, with the Torch plug cross referencing to the BPR6ES, I'm not sure what to do.