Thanks AVB, very helpful and suspect you're right regarding the hardened metering diaphragm, took it out last night and it was a little stiff. The pump diaphragm was soft and malleable though. I've got a mityvac pressure tester and tested the carb in water and there were some bubbles coming from the metering diaphragm end, not many but they were there. I also took the little mesh gauze out as I have seen from previous posts that that may help. The machine starts but will only keep running if I press the throttle down. Starts easily enough but won't keep running.
Machine 2 will need a new primer button and I'll install it when I get a chance. Would like to get at least no.1 going.
