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Spark Plugs 1977 70hp Johnson 70EL77S

P

pdotek

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Anyone know the model of Champ

Anyone know the model of Champion plug for this motor? I have googled it with no luck. I also read that you may not want to use the exact model that is currently in the motor since gas has changed/modified. Is this correct?
 
"Thanks for the info, I'm

"Thanks for the info, I'm not sure if I have a cd ignition system... How would I know if I do or don't?"
 
"Patrick..... Your engine'

"Patrick..... Your engine's (1977 70hp Evinrude/Johnson) ignition is what is called "Magneto Capacitance Discharge" ignition. It is a "CD" ignition system.

The original recommended gap was .040 and remained that way until some point in the early 1990's. If the .030 gap gives you a problem, try the .040 setting."
 
"Sorry to have confused you. A

"Sorry to have confused you. As Joe says that engine has CD ignition. the point is with CDI you should not use a plug with a high resistance suppressor, hence the inductive ones. Identified by Q in Champions and Z in NGKs.

Technical article HERE if you like reading that sort of thing."
 
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