Mainship 40 Trawler Single Operator's Manual - page 58
DANGER
!
!
Leaking fuel is a fire and explosion hazard.
Personal injury or death could occur.
5.2 Fuel Tank Components
5.2.1 Fuel Tank Fills & Vents
The fuel tanks are filled through its respective fuel fill fit-
ting and the cap is marked DIESEL.
The fuel tanks fill fittings are located on each side of the
gunwale amidships. The fuel tanks also have a hull vent
fittings. These fittings are located on the port and star-
board hull sides.
The fuel fill and fuel vent hoses, fittings, and connec-
tions should be inspected for leaks and signs of dry rot
or swelling at least once a year. If any of these condi-
tions are present, have an authorized service technician
inspect the fuel system immediately. If a leak is found,
turn off battery switches, disconnect shore power, and
disable any possible source of ignition. Contact your
dealer or Customer Service immediately.
DANGER
!
!
The use of any hose other than the USCG Type A1
or A2 could result in fuel leakage. Leaking fuel is a
fire and explosion hazard. Personal injury or death
could result.
5.2.2 Fuel Supply Lines and Hoses
If any fuel fill or vent hose's are in need of replacement,
ensure that only USCG Type A1 or A2 are used. Each
engine has a fuel supply hose that runs from the pickup
tube in the fuel tank to the fuel water separator (com-
monly referred to as the fuel filter), then from the filter to
the engine. Also, each engine has a fuel return hose that
runs from the engine back to the fuel tank. If your boat
has a generator, the generator will have somewhat the
same setup, with the supply and return hose. The fuel
supply lines or hoses, fitting, and connections should be
inspected often for leaks and signs of wear, dry rot, chaf-
ing, or swelling. A good way to inspect the fuel hoses is
to run your hand along the length of the hose including
the fittings. Leaks will be revealed as wet spots on your
hand. If any evidence of hose deterioration is present,
have a qualified technician replace all the hoses with
USCG Type A1 hoses immediately!
Note: If a leak is found, turn off battery switches, disconnect
shore power, and disable any source of ignition. Do not start
your engines, the generator, or any devices that could cre-
ate a spark. Contact your dealer or our Customer Service
Department immediately! If hoses need to be replaced, make
sure only USCG Type A1 are used.
5.2.3 Generator Fuel Supply Notice
In figure 5.2 we demonstrate the layout of your boat's
fuel pick up lines on the port side fuel tank. See the
Mechanical Arrangement Drawing in the Boating Safety
chapter of this manual for more location information.
The pickup inside the tank for the generator is higher
than the engine pickup.
Figure 5.2
5.3 Fuel Valves
Your boat has fuel shutoff valves located at the tank in
the supply line route. These valves are used to start or
stop the flow of fuel through the supply lines.
Note: Even if the fuel supply valves are closed, there may be
fuel in the supply lines to the filters and engines (or genera-
tor). Disconnecting these fittings without properly bleeding
the system of fuel could result in emptying the fuel filters and
causing a fuel spill. Only a qualified technician should ever
make repairs to your fuel system.
The fuel supply valves are the “ball type” valves.
Turning the handle so it is perpendicular to the valve
body shuts off the supply or return. Turning the handle
so it is in line with the valve body opens the valve, as
shown in Figure 5.3.
Mainship 40 Trawler Single & Twin • Fuel System
5.4