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crack the line going from fuel pump to "throttle" / flow control with mixture in off position, tank valve open. See if there is dripping. My expectation is there should be no flow (ie-cutting off the engine is achieved through no flow through the pump).
What I understand the purpose of diaphragm in the flow divider is, is to provide an "abrupt" cut off of fuel flow as the pressure drops from cutting fuel pressure via the mixture on the control on the pump. But it is not your "stop" of fuel flow. It just provides a clean break. Your pump should be the control that alters fuel line pressure or stops fuel flow.
Last edited by wslade2 : 10-24-19 at 10:11 PM.
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