Jun
30
Written by:
marineadmin
6/30/2011 8:07 AM
Spark plug wires are typically pretty durable. They aren't a moving part so they don't wear out but resistance does increase in the carbon core over time which can result in a weak spark and poor performance that will affect your fuel economy and idle quality. A careful inspection and regular replacement of your plug wires will keep your engine running at peak performance and avoid any problems.
Make a habit of routinely checking your engine before you head out on the water, the things to look for when inspecting your wire set is a break in the insulation. The insulation (the rubber on the outside of the wire) keeps the electricity where it needs to be so it sparks on the inside of your engine, not someplace else before it gets there. If the insulation is cracked, the spark will jump off the wire, or arc, onto something metal in the engine compartment. Sometimes these breaks are not visible but you can see a spark jumping from the wire to a ground in the engine compartment.
An arcing plug wire can cause a weak spark or no spark at all in the cylinder with the bad wire. This makes your car run rough and can affect your gas mileage. It can also cause unburned fuel to pass into the exhaust system where it can end up in the water through your exhaust. There have even been stories that involve both a fuel leak and an arcing plug wire, resulting in a fire! It does happen.
So do a quick inspection and save yourself some headaches. Here's how:
With your engine off, start at the distributor end of the spark plug wire and follow it all the way to the plug end. You're looking for any area that is not smooth and pliable. Bend the wires slightly to be sure no cracks appear. Check the boots at the distributor end of the wires to be sure they are not torn or cracked. Finally, check the wires at the spark plug end one at a time by pulling it off the plug and inspecting the end for any tears or cracks. Also look to be sure there is no burning or darkening of the end.
If you find any damage, it's time to buy a new set. Replace them with Mallory Marine's high performance Pro Master spark plug wires for a customer fit and superior performance.