Need help reading Sparkplug

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swampratt

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Should I change this out to a hotter plug or a colder one?

Maybe just leave it alone? It's a Champion F-9Y

champion F9y 002.JPG
 

p238shooter

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I would go with a hotter one and add another ignition system to drill a second plug for each cylinder to get more spark at higher rpm's as you add some nitromethane to your fuel tank so you can outrun the rust buildup.

Shiesh, that is nasty with not even threads showing. Where did you find that, in a mudhole in the yard?
 

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