- Yes, the disc and blades are installed. - I couldn't see any cracks in the carby body. I also replaced the standard needle with one of the rubber tipped needles. I don't think this was necessary, but did it as a troubleshooting step wile it was apart. - I confirmed that the main jet was clear. - I confirmed that the internal channel between the main jet and the poppet valve was clear. - I confirmed that with fuel supplied, it was running out of the carby outlet.
So at this point I know that fuel should be able to get into the engine. I have also previously tested spark and confirmed it was sparking. I have also already changed the head gasket and when I replaced it, from memory there was no scoring on the bore.
- I pulled the starter cord, it was catching and rotating normally. - I sprayed SYB in the spark plug hole and tried to pull start it. Not only did it not start, but the pull start cord could not retract - I removed the pull start mechanism. The spring looked OK. - When removing the pull start shaft, I found it was dry. - When inspecting the under side of the pull start mechanism, I found one of the pockets was full of what appeared to be a metal substance which I could not remove.
I initially thought maybe it was for balancing, but U don't think so. And if not that, what is it, where did it come from, and how did it get lodged in there? Could it be causing pull start issues? Finally, I think I'll try lubricating the pull start shaft to ensure it rotates with ease and isn't grinding in any way.
Any thoughts would be appreciated, I'll let you know the next update when I have it :-)