Champion QL77 plugs vs L77 plugs

[patenglish]

I have a 1989 Evinrude 88 hp. When I pulled the plugs out yesterday I noticed that 3 plugs were Champion L77LC4 and 1 plug was Champion QL77LC4. What is the difference in these plugs and would it have made a difference in performance?

 

[tashasdaddy]

Re: Champion QL77 plugs vs L77 plugs

hay, i've got an 88 88spl i run QL77LC4 the Q stands for quiet, it's a resistor type plug, and stops the engine sound in radios, electronics.

 

[F_R]

Re: Champion QL77 plugs vs L77 plugs

Actually, it is an inductive suppressor, not quite the same thing as a resistor, but the same purpose. A resistor suppresses all frequencies of electricity, and inductor is tuned to certain undesired frequencies and does not suppress useful voltages. Layman't terms here, maybe an electronic engineer will get on me for that.