In an internal combustion engine, a spark plug is used to derive enough power through exploding gases inside the combustion chamber. The spark plug is used ignite the air and fuel mixture, and is positioned at the top of the cylinder where the ratio of the mixture is compressed. As the distributor sends an energy surge along the spark plug wire, the air and fuel mixture is compressed inside the combustion chamber. When the surge reaches the spark plug, the latter will fire and ignite the air/fuel mixture. On the other hand, the explosion inside the chamber forces the piston down again and turns the engine further with the same process in all other cylinders. Such process usually happens one at a time. As such, the spark plugs play an important role in the operation of the vehicle's engine, thus a proper maintenance is needed to maintain a reliable combustion process. However, there is another important component called spark plug wire that cannot be dispensed with when you talk about spark plugs. If you need something that will provide your vehicle a reliable and efficient spark during ignition and combustion process, invest on good quality spark plug wires. For your Mercury vehicle, we carry Mercury spark plug wire products. Simply call our toll free numbers to place your orders, or you can also do it online. We also offer complete shipping as we deliver your order just in time.