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Captn Wil,
First, I wish to thank you for your effort in writing the excellent Diesel
Fuel Polishing System that is posted in the Trawler World web site.
My Lindy has a Detroit Diesel 6-71N. The fuel system has two Racor 900FG
2u filters that I can run individually or in parallel. The 2-tank fuel
system plumbing is similar to your "Polishing System With Racor Filter"
diagram. I have just purchased a Walbor 24V/7PSI pump, but its not yet
installed.
I am not an expert on diesel engines, so please bear with what might be a
very basic question: Looking at your diagram I see that the fuel is pumped
by the Walbor into the lift pump on the engine, whether the engine is
running or not. If the engine is NOT running (and the lift pump is not
turning) how does the fuel get through? Is it able to flow through the
lift pump anyway? Also, what happens to the fuel when it goes into the
engine? It would seem to me that most fuel would return via the return
line, but also some would collect in the cylinders since they are not
firing. Clearly your system works just fine, so I'm obviously confused and
ignorant about just what's going on in there.
Could you enlighten me [us] as to why this doesn't flood the engine with
fuel?
