CHAMPION SPARK PLUG #293, CLOSE OUT (3 IN STOCK),”This closeout item is not returnable nor refundable—all sales are final”
Champion 14mm thread size spark plug. If you’re unsure of the heat range you need, a colder plug will eventually foul and misfire, but will not damage the engine. A plug that is too hot can cause pre-ignition. HEAT RANGE: Cold, SEAT: Flat, REACH: 3/4, HEX: 5/8, TIP: Cut Back.