So the B112 is very hard to start when it is much below 50. It runs great once it finally starts. It also starts instantly in warm weather. I got to wondering about the condition of the plug. What I took out was a Champion LM 19. I was under the impression that it was supposed to have a Champion RJ8C. I replaced it with the hotter RJ12C. So, could the LM 19 cause the hard starting? I notice that the plug is a bit longer than the LM19. Is the RJ12C fine to run in this? It did seem to start much easier with this plug, though it really is not that cold here.