Re: 15hp ignition conversion plug change

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June 1, 2017 at 11:57 am #58762
joesnuffy
Participant

    I to use the NGKs B7HS in the 9.9s they seemed to do the best both on cd and points ignitions on the 9.9 motors I have worked on. I think the R is resistor if memory serves me correct not using the resistor worked better for me.

    Joe

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