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post #11 of Old 05-10-2019
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Re: Fuel lifting pump making noise when first starting engine

Originally Posted by krisscross View Post
Yes, its a NAPA pump that PO installed between the Racor filter and the injection pump. Any idea what fuel delivery pressure is needed there? I would like to have a backup and guy at NAPA tells me I need to know that. I have read somewhere that it’s about 6 to 8 psi.
It's not about pressure at that point in the system, just GPH. Obviously, your pump must pump enough fuel for the diesel to run.
We on sailboats don't have much problem with even the smallest pumps rated by GPH but imagine a motor vessel using 75 to over 100 GPH per engine. That's when electric fuel pumps start getting expensive.

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