T&T: Fw: Fuel Polishing System

[Larry N. Brown]

> I installed Capt'n' Wil's system about 6 years ago.  Four x 125 gallon
> tanks, plumbed through manifolds so I can move fuel from any tank to any
> tank.  We wore out the little Walbro after abut 18 months and replaced
> it with a 120 gallon/hr Oberdorfer from Depco Pumps, the same one
> recommended by Gulf Coast Filters for boats with tankage of 500 gallons
> or more.  Not possible to do shift tank draw/return automatically at any
> reasonable expense.  That gives me an excuse to go into the holy place
> to change tanks and check everything out.  I typically run the system on
> one tank for a few hours on Saturday and then move to the next tank the
> following weekend.  I installed the Racor vacuum gauge, but I don't
> think there's any magic there.
>
> Regards,
> Larry Telford
> Carpe Diem
> 1985 Royal Star 42
> Emery Cove YH
> San Francisco Bay


This raises a point of interest to me. My polishing system involves separate 
pickups and returns for fuel transfer/polishing/bleeding. The heart is the 
aforementioned Walbro 43 gph pump and a GCF F-1 linked together by braided 
SS covered 3/8" fuel hose and Aeroquip fittings. My question is if this hose 
diameter is sufficient to withstand the suction and flow of the 120 GPH 
pump?

By the way, I installed two switches in the system. A simple SPST switch for 
fuel polishing- suction and return on same tank- and a spring powered timer 
switch for transfer. I calculate the volume of fuel I want to transfer and 
set the appropriate number of minutes on the timer.

Regards,

Larry and Teri
M/V Cigano, 47' Prairie Sundeck Cruiser
Lying: Bear Point Marina
           Orange Beach, AL