see attachment. same plug, different sides.
i pulled the plug today after probably 100 miles. half is white, half is brown. i've only seen them color pretty much evenly. what's causing this, is it indicative of a problem?
it's an FA50
I would guess that the side toward the exhaust port is running leaner. You could clean the plug, reinstall it, and put an index mark on it with a sharpy. THen you'll know the next time you check it. You better be careful if it's getting frosty white! Give it a little less air, or more fuel.
i'll check on that. thanks!
so you want to index your plug so the spark is on the side with more fuel (black soot), correct?
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