Re: 1929 14HP Evinrude Fastwin sparkplug

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April 20, 2015 at 10:48 pm #14384
George Emmanuel
Participant

    US Member

    Richard,

    I’ve had poor luck with the D-9s (509) in some of my bigger engines and several of my fellow Fl Ch. members feel the same. Steve Wood put new Champions in a Speeditwin this past weekend at the Suwannee meet and it wouldn’t go—-put in the old plugs and off it went. I don’t know. I cruise my ’48 Speedifour a lot and can’t afford problems. I must say though that I have some D-9s in other motors and have had no problems! Maybe it is just me???