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Champion Spark Plug RHM40E
Champion Spark Plug RHM40E
Champion Spark Plug RHM40E
Champion Spark Plug RHM40E

Champion Spark Plug RHM40E

Code: CHRHM40E
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Operating up to high temperatures Champion spark plugs stand up to high pressures and lead deposits with superior performance. Every spark plug manufactured has built-in design advantages that assure longer life and greater reliability.

Champion RHM40E Standard Electrode Aviation Spark Plug, Thread size: 18 mm, Reach: 1/2"/1.27 cm, Shielding Thread: 3/4" - 20, Standard Electrode: Two Prong, Plug Gap: .016"-.021"/0.41-0.53 mm.

Please do not open any spark plug until you are sure it is suitable for your application. Champion Spark plugs are supplied in factory sealed plastic cases. We cannot accept back opened spark plug cases unless under warrantee.

Overview of Champion Spark Plugs

In the early 1900s, small planes flew with single ignition systems powered by adapted automobile engines using Champion-brand automotive spark plugs. By the 1920s, the company had developed innovative spark plugs designed specifically for the aviation industry.

Now, as the preferred supplier of spark plugs for general aviation aircraft, Champion Aerospace designs and manufactures Champion-brand piston-engine ignition components for both OEM and aftermarket applications.

Champion manufactures more high-performance, aviation-grade spark plugs than any other company in the world.

All Champion Aviation Spark Plugs are identified by type designations selected by virtue of the plug design as applied to the following Spark Plug Number and Symbol Chart. The symbol is composed of a rating position number together with prefix and suffix numbers to indicate major plug design characteristics.



1. Resistor None--No Resistor R--Mil-Spec. Resistor-Erosion protection
2. Barrel Style None -- Unshielded E -- Shielded 5/8"-24 Thread
  H -- Shielded 3/4"-20 Thread (All Weather Plug)
3. Mounting Thread -- Reach -- Hex Size B-18mm 13/16" / 2.06cm 7/8" / 2.22cm M--18mm 1/2"/1.27cm 7/8"/2.22cm
  L-14mm 1/2"/1.27cm 13/16/2.06cm U?18mm 1-1/8"/2.85cm 13/16/2.06cm
  J -- 14mm 3/8"/0.95cm 13/16/2.06cm
4. Heat Rating Position Low number--cold High number--hot
5. Electrode Design None-Conventional single E -- Two prong massive
N -- 4 prong massive
  W -- Fine wire (Iridium) B --2 prong massive, Tangent to Center
  P--Fine wire (Platinum)

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