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Excess carbon on plug

Plug carbons up in seconds

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The plug can't really carbon up in seconds. Change the oil first. If the plug fouls up with oil quickly you have a broken oil ring on the piston. If the plug fouls with gas, there's a problem with he carburetor.

Posted on Jul 20, 2013

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It is common for carbon-tracking to occur if your original plugs were carbon-tracked and you replace the plugs without replacing the wires. If the plug is carbon-tracked, the boots on the wires or the coil boots (coil-on-plug ignition) are also carbon-tracked. If you do not replace the wires or the coil boots, the ignition will still misfire by following the carbon-track on the inside of the boot. This will cause your new plugs to also be carbon-tracked within a short period of time (days or weeks).

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