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It's the metal threaded portion of the body that screws into the cylinder head. Too long and the piston can get damaged. Too short and the cylinder will not fire properly

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Q: What is spark plug reach?
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What happens when spark plug wires are to short?

They will not reach the plug, therefore the engine will not work.


The length of the metal threads at the end of a spark plug is called the?

The length of the metal threads at the end of a spark plug is called the "reach".


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Where is the spark plug on a 1996 Polaris sportsman 500?

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How do you get a spark plug out on fiesta zetec?

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