What Plugs Should I Use with Marine CDI?
Do not use a standard resistor type plug on an outboard marine motor with CDI... Read More
Should I Gap My Plugs?
Yes. A spark plugs gap directly affects the tip temperature and the voltage necessary to fire the plug.... Read More
What is a Spark Plugs Heat Range?
The term heat range refers to the speed with which a plug can transfer heat from the combustion chamber to the engine head... Read More
NGK Spark Plug Metal Types
What are the various metal types used in NGK spark plugs? Read More
What are Copper Core Spark Plugs?
Almost all spark plugs use a copper cored center electrode to conduct the electricity, jump the gap, and promote heat dissipation... Read More
NGK Center Electrode Designs
Center electrodes come in a variety of shapes and sizes... Read More
NGK Ground Electrode Designs
Ground electrodes come in a variety of shapes and sizes... Read More
What is a Resistor Spark Plug?
Resistor spark plugs prevent interference with electronic equipment... Read More
Spark Plug Terminal Types
Spark plugs are manufactured with three different terminal configurations... Read More
ISO vs. JIS Spark Plug Heights
What are ISO and JIS plug heights? Read More