Frustrating they are. I've got 4 Ryobis that I've had for some time. I can get them all to start but none run on zero choke. I assume it's fuel related but most of the carbys have been cleaned and had diaphragms replaced. I know the compression is ok, spark is ok. I have to assume there is an air leak but I can't work out where? I did read that the gaskets on the crankcase fail after a few years on whipper snippers, I guess a last resort is to buy some gasket material and make up some new gaskets. Other possibility is to try a brand new carby but I can't find a direct equivalent to what I have. Did ring one mower shop who said they could sell me a 2nd hand Ryobi carby for $35. They are pretty sure that it was working when they stripped the machine down.
