Fuel Polishing System
Mounted for easy installation
|I have assembled a fuel polishing system consisting of two Racor
500 FG filters, a 7 psi Walbro fuel pump, 4 three way valves, a vacum
gauge, and assorted fittings and hose onto a plywood board.
Once assembled, I can install mounted system in the boat and hook
up the connections to the fuel tank, to the engine, from the engine,
and the return. I will be using Parker Push Fit fittings for all the
I got the idea of using the Parker Push Fit fittings from Pete Dubler
on Regina Oceani I also got the design off the internet...at a chat
board for trawlers I believe...Fuel Polishing System Plumbing
Layout...The person who designed it is named Bill Bickley. I liked
the design and it fit my limited budget, space, and needs.
See below for the drawings that Bill Bickley developed.......
The fuel system runs through the primary
Racor filter and to the engine as it did
before....only now the feed line goes into
a three-way valve. In normal operation, it
will go to the primary filter and out to
another three-way valve...which will
normally be set to feed the engine. The
engine return runs into another three-way
valve and will normally be directed back
to the tank.
Marked in green tape seen below....
Back up Operation:
In the event the primary becomes
inoperable, I can switch to have the fuel run
through the polishing filter. This will require
me turn the first three-way (marked with
blue tape). It will run throught the polishing
filter and through the Walbro pump. This
will come into another three-way valve and
will require be to turn the three-way valve
that feeds the engine to blue.
Marked in blue tape seen below....
To run on polish....I have the valve settings
the same as on back-up and just change
the return three-way valve to bypass the
engine. I turn on the Walbro pump and now
can filter the tank through a 30 micron
Marked in yellow tape seen below....
Connection to existing lines:
I am planning on connectig to the existing copper fittings using some adapters that will fit the exsisting
copper flare-nuts. I will then run hose back to my fuel polishing set up.
The fittings can be seen below....