E3

Buying Guide: E3 Small Engine Spark Plugs

Reach and Engine Applications
The 0.375 in. reach plugs are used in small engines, especially lawn and garden equipment, and the 10mm plug with a 0.500 in. reach is used especially for handheld lawn and garden equipment. The 0.307 in. reach plug has a taper seat and is used in a variety of small engines, especially chainsaws.

Four Cycle and Honda Engines
The 0.750 in. reach plugs are used in four cycle, overhead valve small engines, and each comes in a pack of 6. One of them is widely used in Honda small engine applications. Check your engine manual to confirm the plug before you order.

DiamondFire Technology
E3 plugs in this lineup use DiamondFire technology on the ground electrode of one plug and on the side wire of the others. It is designed to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.

Frequently Asked Questions

What does E3 offer?
E3 offers spark plugs for small engines, with 14mm plugs at 0.307 in., 0.375 in. and 0.750 in. reach, and a 10mm plug at 0.500 in. reach. Some plugs come in packs of 6, and the lineup covers lawn and garden equipment, chainsaws and four cycle overhead valve engines.

How do I choose the right spark plug?
Start with the number on your old spark plug and match it to the same E3 number. Compare the reach, such as 0.375 in. or 0.750 in., and the size, such as 14mm or 10mm, before you order. Your engine manual is the final check.

What is DiamondFire technology?
DiamondFire is E3 technology used on the ground electrode of one plug and on the side wire of the others. It is designed to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.