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Old 01-16-2017, 04:00 PM   #68
smitty477
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City: Northport
Join Date: Aug 2015
Posts: 2,046
"Hmm...I see what you're saying. But without the pump to create suction there could be no vacuum created, yes?"

Agreed 100% - without the ability tp pump the fuel the vacuum is lost at the point that the fuel pump cannot keep up. Just like any main engine or any genset once the vacuum overcomes the pump then the fuel does not flow. One of the reasons that all gensets as well as mains have fairly robust fuel pumps so they can maintain a running status with random fuel tank installations and fairly pugged filters. Many folks that work on these typical diesel pumps believe that higher restrictions of fuel flow and pressure lead to higher heat and a lack of lubricity which affects these components negatively. So most feel that removing/replacing a filter prior to the point where is affects engine rpm will avoid that lack of flow to these components.
Much more information would likely be gained by posting and/or reading over at boatdiesel(dot)com where many industry professionals often respond.
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