Bad running

[Hobbo]

Hi all, eureka have just got it free, undid the bolt and overnight sprayed with plusgas, it was still very tight but worked back on forth and have now got movement. Looking at the threads on the bolt shown on the picture, it may not have gone fully home in the first place, lesson learned examine everything carefully before undoing. Many thanks for all your valued help, back  into the garage to do some timing adjustments. Thanks all Mike p.s. have still got in place little oiler tube