The Challenge 2000 Class boats have FOUR fuel tanks built into the hull. The arrangement shown below is NOT correct for Ironbarque. For example,

  • The fuel filling loop terminates at the AFT Stbd Fuel Tank. The fuel suction loop terminates at the Aft Port Fuel Tank.
  • The filling pipe into the Aft Stbd Fuel tank is aft of the fuel suection pipe.

However, the general concept of a circuit with each tank having an independent valve for both filing and suctioning is correct. In Ironbarque, the filing hose is the THICKER and the fuel suction hose is THINNER of the two pipes.

The primary fuel filters are the two glass bowls on the forward bulkhead of the Oilskin Locker. You should check them at least daily or each time you fill the day tank.

Drawings of the fuel lines in the Oilskin Locker including the connectioins to the oil fired heater are given in the menu item: Drawings.

The main engine and the generator both have their own dual fuel filters as well.

As sold to us, Ironbarque did not have USCG approved fuel hoses or vents. Since we intended to start our lives with Ironbarque in the USA at the time of purchase, we fitted the appropriate grade of fuel hose. However, we found that you could not fit the same type of hose to the vent hoses without either cutting metal or reducing the internal cross sectional diameter. We accordingly left the vent hoses as supplied.

Fuel Consumption

Fuel consumption figures are provided here courtesy of Peter Pearce. These are for a boat under motor only. For the motor only configuration, Peter recommends 2,000 rpm as the efficient engine speed. On our delivery trip to the USA we found that, when motor sailing, 1,200-1,400 rpm was efficient. We did this by starting at 2,000 and then dropping the rpm until we saw a significant drop in boat speed.

Fuel Consumption Graph

Deisel Engine Facts and Figures

The location of the four tank lids:

  1. Under the sole inside the cupboard under the aft sink.
  2. Under the sole inside the forward compartment of the small settee that is outside the oilksin locker.
  3. Under the sole inside the starboard most compartment of the seat of the chart table.
  4. Under the sole direclty in front of the aft transverse section of the main settee.

To facilitate filing, we have had put into the top of each of the tank lids a 1" bolt that can be removed to both:

  • Augment the tank vents
  • Allow direct visualization of the fluid level

We have a length of dowel that we keep in the Oilskin Locker that we use as a level dip stick.

Tips for Filling

No sources of ignition, please.

You fill from the deck fittings marked "Fuel" immediately forward of the exhaust of the heater (heat + fuel, hmmmmm - interesting design idea).  There are two fittings that both run hoses to the day tank, open both. One acts as a vent.

You open the valve at the bottom of the day tank (not the one without a hose attached) and the deisel enters the tank filling circuit from the day tank. Watch the level in the day tank. If it starts to get to full - stop the bowser for a while until it drains to a safer level. In Ironbarque there is a red line about two thirds of the way up the upper sight glass that says "Stop Here".

I do not like to leave fuel captive in the filling circuit, so, one approach is to:

  • Start with the tank closest to the day tank on the circuit.
  • Open each tank in turn and monitor the level of deisel in it. Fill the tank until about an inch from the top (the level really all depends upon how alert your filling team are!).
  • When full, switch ON the next tank and OFF the tank that has just been filled using the valves on the inlet to each tank,
  • For the tank at the end of the circuit, stop filling when the level is sufficient to allow space for the volume of the day tank and the circuit contents - about four to five inches.
  • Stop the bowser at this level but keep the nozzle in place.
  • Let the day tank and circuit drain into the final tank.
  • Turn off the day tank drain to the circuit.
  • Turn off the final tank fill valve.
  • Fill the day tank from the bowser (and sell one of your children to pay for the deisel).

If the last bit is too fussy - fill the last tank as the others.