This is a quote from an article by Gordon Groene about the Atomic 4 published in 1976 in Motor Boating & Sailing. It was reprinted by Practical Sailor in May 1981.
"... Fuel should never be turned off to an engine-driven, diaphragm-type pump unless the shut-off valve is between the pump and the carburetor, because any interruption in flow on the suction side causes distortion of the diaphragm,--the major cause of diaphragm leakage"
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