i purchased a ryobi carb kit from a local parts shop but it has a lot of parts that i don't think go on this model.I already replaced the rubber diaphram with the silverring on one side of it.do i need all the parts?

chip millerick, March 2008

There is a sometimes fuel pump membrane that must be replaced that works in conjunction with the Diaphram. It has a couple of reed valves in it (2 small flappers?) with its associated gasket.
It is sometimes a thin plastic material or a rubber like material like the diaphrams material.

Bob, March 2008