I have not been making much structural progress with my steel Bruce Roberts Offshore
38,but instead have been working on the new Fuel
After some lively discussion on another thread about the best design I came up with this schematic for the system:
will enter the system from the main tank which will be the only tank with a deck
As the engine
in my boat is a Volvo Penta
2003 28hp which sips fuel at only 1.54 gph, I could use some somewhat smaller filters.
The first filter is a Racor
200FG with a 30 Micron element which has a flow rate of 15 gph.
The second filter is also a Racor
200FG with a 10 Micron element.
both filters will have the fuel drawn through them by the fuel pump
which comes after the 10 Micron filter. This keeps the system from having any pressure on it so that if any leaks
occur no fuel is sprayed around.
After passing through the pump the fuel can be either directed to the Day Tank to feed the Engine
after passing through a third filter at 2 Microns, (this filter will be a Racor 500FG), or it can be directed back to the main tank to allow for fuel polishing.
Heeding some discussion about the need for heat shields to prevent the plastic bowls on the filters from melting in the event of an engine room fire, I decided to put the majority of the system inside a stainless steel equipment
cabinet. I found a used cabinet on eBay for $85 shipped that was 23"X16"X8" which was more than large enough for what I had in mind.
The fuel lines will be stainless braided high performance "AN" fuel hose to prevent chafing damage. They enter the cabinet through bulkhead fittings installed in the bottom of the box.
These re-usable elbow
fittings help to keep everything neat and tidy without putting too much stress on the hose:
Here is a shot of the polishing/ ransfer part of the system so far. The fuel inlet is on the far right with the pump at the far left. I used 1/4" steel tubing and 37 degree flare fittings for all of the connections:
I still have to set up a cabinet for the 2 Micron filter, and build the timer switch and float switches to prevent the fuel pump
from overfilling the day tank. but that will come soon enough. I located an aluminum
50gal tank for my main tank, and I already have a 20gal day tank.
More updates as they come.