Overview
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 |
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) |
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. |
Product Attributes:
Brands: Champion
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