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ENGINE CONNECTIONS
Actual Connector:
Fuel supply and leak-off = 8 mm conex with olives
Seawater cooling pump = 22 mm OD
Exhaust water injection bend = 50 mm OD
FUEL SUPPLY & LEAK OFF
25
Fuel Supply and Leak Off
Vent
Fuel tank
Stop tap / valve
NOTES:
1. A fuel / water separator must be installed.
2. The mechanical fuel lift pump is fitted to all engines
as standard, but if a suction head of 0.25m or more
is required, then an electric fuel lift pump must be
fitted (ask your dealer or Beta Marine).
3. It is very important that the excess fuel from the
injectors is fed back to the fuel tank and not back to
any point in the supply line. This will help prevent air
getting into the system.
4. The fuel return (leak off) pipe must loop down to be
level with the bottom of the tank before it enters the
top of the tank - see drawing. This prevents fuel
'drain down'.
Required Pipe Size:
8 mm OD piping for both, a flexible section is required
Seawater pump inlet = 22 mm ID hose
Flexible rubber exhaust pipe of correct quality = 50 mm ID
Flexible Fuel
Connections
to be used
Fuel / water
separator
5. Fuel lines and hoses connecting the fuel tank to the
6. Any fuel leaks in the system when static are likely to
18
Engine (All Fuel Connections Supplied)
Fuel injectors
Fuel filter
engine, must be secured, separated and protected
from any source of significant heat. The filling,
storage, venting, fuel supply arrangements and
installation must be designed and installed so as to
minimise the risk of fire. When connecting the engine
to the fuel supply and return lines, flexible fuel hoses
must be used (next to the engine) and must meet the
requirements set in standard
ISO7840:1995/A1:2000 and/or as required by your
surveyor / authority.
cause poor starting and erratic running and must be
corrected immediately. These leaks will allow air to be
sucked in when the engine is running.
Fuel injection
pump
Fuel lift pump
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