My 1998 johnson 130 is running a little rough at low rpm. I read and I was told that theses motors are very temperamental and they prefer original johnson parts. Right now I have NGK plugs in. I just ordered champion plugs which are recommended. I want to replace the plug wires. The omc wires come in components that I need to assemble. Are the Sierra replacements just as good or will the omc be better?