CHAMPION SPARK PLUG TYPE

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 R -- Push-wire--90° to Center 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 U­18mm 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)   CHAMPION SPARK PLUGS SPARK PLUG DESIGNATION MASSIVE ELECTRODES Price Each Buy Shielded Unshielded 5/8-24* 3/4-20* M41E (18MM) $25.25 REJ38 (14MM) $37.50 REL37B(14mm) $37.25 REB37E $21.75 RHB37E $21.75 REM37BY $21.75 REM38E $21.75 RHM38E $21.75 REM40E $21.75 RHM40E $21.75 RHU27E $55.50 REB32E $21.95 RHB32E $21.75 IRIDIUM ELECTODES** Price Buy REM38S $73.25 RHB32S $74.25 RHB36S $74.25 RHM38S $74.25 REB-36S $74.25 * 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. Download Champion Aerospace Aviation Catalog PDF