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 Engine Parts - Spark Plugs - Champion - All Champion Spark Plugs
 
CHAMPION SPARK PLUGS
 
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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.

A TYPICAL SPARK PLUG NUMBER WITH SYMBOL EXPLANATION

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 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)


* Shielded barrel thread size. Check barrel size - 5/8x24 or 3/4x20 threads before ordering and select proper plug number, See page 236 for Sparkplug Application Table.

** The "Iridium S" sparkplugs replace the Platinum and "W" Iridium types. Increased bore diameter improves scavenging action. Greater clearance volume can accept more combustion deposits. Single Iridium electrode offers greater resistance to lead attack. Easy to clean Easy to gap


NOTE:
Spark plugs are shipped in factory sealed plastic cases. Opened spark plug cases make the spark plugs non-returnable. Please do not open any spark plug until you are sure you have received the correct spark plugs for your application.
 
MASSIVE ELECTRODES
Shielded Unshielded
5/8-24* 3/4-20*
M41E (18MM)
REJ38 (14MM)
REL37B(14mm)
REB37E
RHB37E
REM37BY
REM38E
RHM38E
REM40E
RHM40E
RHU27E
REB32E
RHB32E
IRIDIUM ELECTODES**
REM38S
RHB32S
RHB36S
RHM38S
REB-36S
RVL38S