Operating instructions

4L4: Fuel Management
In the aft end of the engine room there are sight gauges on just forward
of each tank that let you see the level in each. To use, you must open the
valve on the top and bottom of each gauge tube. Be sure to close both
valves after use! They protect the boat in the event a sight gauge breaks!
There also is a fuel manifold consisting of a set of valves for the fuel
supply to the main engines, generators, and Diesel furnace.
Normally, you will leave these fuel valves all “on”, and let the boat
draw equally from the tanks.
Changing the valves risks spilling fuel, starving an
engine, or bursting a hose! Leave them alone.
4L5: Fuel Supply Manifold
The Fuel Manifold is located directly under
the 20KW generator enclosure on the aft engine
room bulkhead under the work table. Each engine
has a fuel supply from this manifold.
Since extra fuel is pumped to the engine
that is used to cool the engine’s injection pump,
there is a fuel return line as well from the engine;
this goes into a return manifold that distributes
equally to the boat’s two tanks.
There are valves in the return lines from
each engine, and in the lines from each tank to the
manifold. These valves should be left in the “all
open” mode. It should be remembered that at slow
speeds, these return lines are pumping a lot of fuel; tampering with the lines could mean that
a return line might be switched long enough to overflow and pollute the water through the tank
vents’ overflowing!
A sight tube.
Transfer Pump
Section 4L: Fuel System 4.29