Your engine's efficiency depends on how good your spark plug works to ignite the compressed air-fuel fusion within your combustion chamber. Typically, the spark plug pulls its igniting power from your Mercury Mountaineer spark plug wire. Generally dubbed as ignition wire, the spark plug wire hooks the spark plug onto the ignition coil. This cable will send voltage to the spark plug that will be used to fire up the compressed fuel-air inside the cylinder.

The Mercury Mountaineer spark plug wire typically features high amount of resistance to thermal stress, but breaks on insulation can make it worthless. Deterioration on the insulation and its fitting make the line worthless. You need to replace the ignition wire right away to prevent engine damage.

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