Hi Grumpy & Tim, I have checked out all gaskets and diaphragms all seem good. The flap valves are nice and flat their not bent or damaged in any way. Main diaphragm is good, all locating pins are lining up. Should I get another kit and start over again?? When I suck through primer connection with my finger covering fuel inlet I can hear the diaphragm working but sucking air as well? So am I correct in thinking that the diaphragm and or gasket are no good and need to be replaced again?(just thinking this way as I have brought new spark plugs that were no good, maybe this kit was no good???)