Thanks Blumbly, you're right about the rods, there was one on the bottom but the top one was missing and I think you're right about it being a 125cc too, I appreciate the diagram, I believe I've got all these parts but I still cannot get the kill switch to work.
I have taken the carby apart again and this time gave it a thorough cleaning using carby cleaner, air compressor and a thin wire to clean out all the orifices. Removed the brass jet and gave that a thorough clean too but mower still does not start. I may be off the mark but I believe that there is not quite enough compression to draw the petrol into the engine. It's a close thing and maybe putting some petrol into the spark plug hole provides just enough of a seal to get the engine going.
