MJM Yachts 36z Express - Manual (Page 28)

5.0
5.1
FUEL SYSTEM
GENERAL
It is important to understand the fuel system aboard your boat. Diesel fuel is different than
gasoline. In most respects it is safer, however precautions need to be taken to maintain the safety
of your boat. Please study the safety precautions in the NMMA publication “Sportfish, Cruisers,
Yachts – Owner’s Manual.”
Diesel engines need to intake more fuel than they burn, and so they differ from gasoline engines
in that they return excess fuel to the tank. Both feed & return of port and starboard engines are
their respective 175 gallon fuel tanks. The two fuel tanks are connected at the bottom by a
“compensating” fuel line with isolating shut-off valves at both aft inboard corners.
FUEL SHUT-OFF VALVES
These valves are located on top of the fuel tanks aft and are accessed through pilothouse seat
lockers. In the photos below they are shown in the open postion, parallel with the fuel lines.
These valves should be shut down if inspecting a Racor filter, in an emergency
or in case of a fire in the engine compartment.
STARBOARD TANK showing fuel shut-off ,
VacuFlush Tank & Pump and Raymarine
Autopilot Interface Box
A fuel line connects the two fuel tanks with shut off
valves in the lower, inboard aft corners of the two
tanks, underneath the mesh organizer bags in
pilothouse settee lockers. The port valve is shown
in this picture. Generally, It’s a good idea to keep
these closed, allowing each engine to draw from
its own tank and to make filling the tanks easier.
With valves closed, fuel tanks can also be used to
correct static trim. If you have more gear stored on
one side of the boat than the other, add less fuel
to the heavier side.to equalize.
CHAPTER 5
PORT TANK showing fuel shut-off for port
engine as well as AC Compressor.
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