My Evinrude E4RESR has some degree of fouling that I would like to take preventive action against. Engine has been running Champion QL77JC4. I also see Optional plugs listed are QL86C or NGK BZ7HS-10.
What is a good (slightly hotter) sparkplug to replace the QL77JC4? I would think next hotter is QL77JC6. Or L77JC6 ( I don't need the "Quiet")? Or could I use NGK BZ6HS-10?
Any input will be much appreciated...
What is a good (slightly hotter) sparkplug to replace the QL77JC4? I would think next hotter is QL77JC6. Or L77JC6 ( I don't need the "Quiet")? Or could I use NGK BZ6HS-10?
Any input will be much appreciated...