Hacksawhero123 351 #1 Posted November 14, 2016 Yesterday I had the plug out of my k341 while looking for the timing mark on the flywheel. I noticed carbon in the bottom of the threads of the plug hole. It appears that my plug is not long enough to cover the depth of the threads. That also places the electrode and "spark" recessed into the plug hole. I'm using a Champion H10C that I read somewhere is the correct plug. Does this sound right? Thanks. Mark. Share this post Link to post Share on other sites
benji756 341 #2 Posted November 14, 2016 The chart I have calls for a RH10C, not sure if theres a difference or not. after checking it looks like they are the same 11.2mm reach Share this post Link to post Share on other sites
1995 520H+96+97 935 #3 Posted November 14, 2016 Maybe two (too) many washers. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,441 #4 Posted November 14, 2016 H10C and RH10C are the same except the R adds a resistor to suppress radio interference. Years ago there was a H10 and the C was added when they used a copper electrode. Garry Share this post Link to post Share on other sites