J8J spark plug

[benji41]

What is a good replacement for a Champion j8j plug.

Jim Benjamin

[Anonymous]

What motor and year?

[frankr]

J8C is the closest current direct replacement. If you want to make it into a “J”, file the side electrode back half way across the center electrode.

[Mumbles]

NGK B6S would be a good choice.

[labrador-guy]

A J8 is to warm for OMC motors. Most Johnson and Evinrude run J6 or J4 or the AC /NGK equivilent spark plug.

dale

[westwind]

I have a Wizard WG4 with an XJ8, I think that is before J8J, anyone have more details on the sparkplug history?

[frankr]

Old Champion book says XJ8 was a resistor plug, replaced by RJ8. I sort of doubt it belonged in your Wizard (?).

EDIT: Same old book says your WG4 is supposed to have J8J plugs.

• This reply was modified 5 years, 1 month ago by frankr.

[westwind]

That maybe makes sense, google kept finding plugs for a Jaguar XJ8…..if they are resistor, they do seem to work.

[Anonymous]

Resistor plugs should not be used in magneto equipped motors. The Wizard WG4 called for J8J that superseded to J8C that should be gaped at .025 As Frank said you can make a J8J by filing back the ground electrode half way back from the center line of the center electrode of the J8C.

[RICHARD A. WHITE]

My Wizard Super 10 has Wizard dual electrode plugs, pretty cool

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[Author]

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