then I removed the RD bolt, tip seemed not worn, & re installed, not sure where it should be set. What is indicated by # 4 & #5 not stalling, or causing stumble, when line is cracked? Chuffer, posted recently that he had similar symptom, stall on cracking # 1,2 & 3 but not on 4 & 5 , does it indicate weak IP? I will do comp test when I can but as blowby is non existent & it starts very quickly I think comp is good, could problem be IP?