E3.20 Spark Plug

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Small engine plug that primarily fits 4-cycle, overhead valve engines. profile view
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ITEM # : E3.20
Small engine plug that primarily fits 4-cycle, overhead valve engines.




E3.20 is a 14mm, 0.750” reach plug with a gasket seat. It is used in a variety of four cycle, overhead value small engine applications. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance over an extended product life.


NGK:  BCP4ES-11, BKR4E, BKR4E-11, BKR5E, BKR5E-11, BKRES, BKR6EKB-11, FR4, FR5

Part Number: E3.20

Resistor: Resistor

Hex Size: 5/8"

Thread Reach: 0.750"

Thread Diameter: 14mm

Seat: Gasket

Tip/Gap: DiamondFIRE Adjustable Gap

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Reviewed by mharnish
08/07/2019 - 06:10:49 PM
E3.20 Spark Plug
Thank you E3 for finally making the "no fail" spark plug. We had trouble with starting our Generator, pulling , pulling, and pulling, then when we decided to pay the little extra and get the E3. Never will regret that decision, this starts every time on the second pull. Just recently, our Troy Built lawn tractor was not running well, first thought, lets put the E3 spark plug in this as well , and WOW, what a difference. Thank you for making a good product. Don't believe me, just buy this Lifetime Guarantee product, you will see for yourself. In time, everything we own will have the BEST spark plug , E3 plugs in all of them... Thanks you E3.....
Reviewed by Roygene
10/28/2017 - 03:30:59 PM
E3.20 Spark Plug
Years ago I tried my first E3 Spark Plugs in a Kohler 15 HP engine. I ran that engine for 10 years with that plug. Today I use two E3.20 plugs in my Kohler SV720 with excellent results. My engine feels powerful and doesn't appear to use as much fuel with the E3's as with the standard plug.
I have a 4 cylinder in an S-10 Chevy pickup that I used E3's in for 5 years with no problems. I occasionally inspect them and they still look good so I leave them alone. The truck has 178,000 miles on it. I believe in E3 spark plugs
more power, reduced emissions, improved fuel efficiency, longer life, faster starts