Lt4000 Spark plug
Hi i have a craftsman lt4000 with a briggs and stratton model # 28n707. i recently broke the spark plug when tightening it back in and researched and found that the replacement is spark plug "rc12yc" (had to research because ceramic broke into tiny little pieces and couldnt see number on that plug) i picked up one of these plugs and compared it to the threads on the one i broke. the threads on the new one are considerably longer and i dont wanna put it in my engine and completely destroy it. i researched more and everything ive found still says plug rc12yc so i was wondering if anyone could help.