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Mercury
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2010
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Mountaineer 4WD V8-4.6L
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Repair and Diagnosis
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Tune-up and Engine Performance Checks
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Spark Plug
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Specifications
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Spark Plug Gap
Spark Plug Gap
Spark Plug
Gap 4.0L
0.052-0.056 in. (1.32-1.42 mm)
Spark Plug
Gap 4.6L 3 valve v8
0.039-0.043 in. (1.0-1.1 mm)
4.6L 3 valve v8
spark plug
gap is not adjustable.