2243 spark plug (MS35909-1). NSN 2920002883126. For M37, M39 w/ Continental R6602, M35 w/ OA-331, M151, M38, etc ... most 4 and 6
cylinder gas engines on M series vehicles except for M715 (see type 2344).
Price listed is per spark plug.
In most applications also replaces p/n 2245, WR46, XMJ17, MS35909-2, SR6F15, AR7S, WS506, 54526A. NSN 2920002879135
2243 is the original version. 2245 (MS35909-2) was a hotter plug with a pre ignition rating of 155 psi vs. 200 psi on the 2243 spark plug. The 2243 is recommended for year-round normal driving conditions.
0.2 lb ea