Spark Plug Condition Chart

A normal spark plug will have brown or grayish-tan deposits on the side electrode.

Spark plug condition chart. When reading spark plugs you will likely find one of the following conditions. Most spark plug gapping tools are shaped in a circle. Home XS11 Info Tech Tips Maintenance Battery - Electrical Common Spark Plug Conditionswhat they look like.

This is often caused by over advanced ignition timing poor engine cooling system efficiency a very lean airfuel mixture or a leaking intake manifold. I have a problem with finding the rite sparkplug for my 2007 xtreme typhoon 125cc. Call 440 1477 532 317.

The operating temperature of a spark plug is the actual physical temperature at the tip of the spark plug within the running engine normally between 500 and 800 C 932 and 1472 F. Oil Fouled Combustion deposits are slight and not heavy enough to cause any detrimental effect on engine performance. This is important because it determines the efficiency of plug self-cleaning and is determined by a number of factors but primarily the actual temperature within the combustion chamber.

Check out Dans MC Spark Plug chart provided by NGK for further diagnostic help. However the greyish tanwhite colour indicates that the plug is the correct heat range and also that the fuelignition systems and engine are generally in good. If everything is good the spark plug should have a tanlight brown color.

The insulator will have a glazed white appearance and may have small black deposits. Oil fouled see valves or piston rings White no color on spark plug. Black oily Spark Plug.