Well, glad you found it, that's kinda unusual, but not impossible I suppose, there are lots of possibilities with all these parts, trying to work together, I woulda thought a quick look at the gear in the pump would have indicated a wear problem, that's another good reason to use a good, Klotz Uplon, upper lube, the fuel pump gets no other lube, maybe that's the reason I've not had any pump failures. Good luck! Bob
"Being old, isn't half as much fun, as getting there"! Ole Robert I!