8 - PROPULSION SYSTEM251
8.8.4 Fuel tank
Bleeding
The tank is equipped with a vent with ame retina.
The geometric shape of the tank allows the decantation of possible impuri-
ties or water in the fuel. For the drainage of water and possible impurities
embarked with fuel, it is necessary to wait for some hours after refuelling, so
that the suspended particles have enough time to settle down.
Drain through the opening of drainage valve located underlying the optical
level. To this aim take off the blanking plug from the valve, open the valve
slowly and let the water and the deposits drain into a container, until only
clean fuel comes out. After the operation close the valve, disconnect the
hose and reinsert the plug.
During the long periods of inactivity of the yacht, when the tank is empty, we
suggest to open the ange and to remove the fuel deposits embarked during
refuelling.
WARNING
The bleeding of tank is a special operation, that has therefore to be car-
ried out by specialized personnel. Contact the RIVA Service Department
to receive suitable help.
NOTE
The crew should always be present during this operation, as fuel leaks may
occur in the engine room.
WARNING
During the tank inner cleaning, it is a good norm, to ventilate the room for
a long time with the help of fans and to wear all necessary protections, to
avoid injuries caused by gas fumes.
During the ange assembly, make sure that the screws are correctly and
uniformly tight, in order to prevent leaks of fumes and fuel.
Furthermore, check the condition of the O-ring.
These are extraordinary maintenance operations. Contact RIVA SER-
VICE in advance.
CAUTION
The purge must never be conveyed into the bilge. If the purge falls into
the bilge, clean it thoroughly and collect the water in special containers to
be treated by the appropriate bodies.
CAUTION
The bleeding procedure should be carried out every two or three refuel-
ling operations.
ENVIRONMENT
Handle water mixed with fuel and dispose of it according to the rules in
force. Use only authorized disposal procedures; in case of doubt, refer to
the Port Authorities.
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