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Good morning, my name is***** noticed this question has been sitting overnight, was this something you still needed help with?
No problem. Sorry somebody didn't get to you sooner. Good luck!
The pumps really are not designed to be serviceable. When low pressure pressure is found the first thing is to run a vacuum test on the inlet side of the pump to see if there is some kind of blockage or restriction in the boats fuel system and plumbing. (bad anti siphon valves are a common issue). But if vacuum looks good, and there is no blockage showing, then the correct action would be to replace the entire fuel cell assembly.