I have three of the in-tank M151A1 fuel pumps, part number 10950785. Question I have is how do I test them? I can’t really sell them if I can’t verify operability. I’ve checked the various TM’s with no luck. Depending on your TM copy, it’s in figure 21, item 10 of TM9-2320-218-34P dated 15 November 1988.