Fuel Supply And Leak Off - Beta Marine Beta 10 Operator's Maintenance Manual

ENGINE CONNECTIONS
Actual Connector:
Fuel supply and fuel leak-off connections are
8 mm conex with olives
Heat Exchanger - Yachts
Seawater cooling connections are is 19 mm OD
Exhaust water injection bend is 50 mm OD
Keel Cooling - Narrowboats
Keel cooling connections are 22 mm OD copper pipe
Keel cooled exhaust stub is 1
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'.
1
/ " BSP male thread
2
Flexible Fuel
Connections
to be used
Fuel / water
separator
Required Pipe Size:
8 mm OD piping for both, a flexible section is required
Sea water pump inlet = 19 mm ID hose
Flexible rubber exhaust pipe of correct quality = 50 mm ID
Engine inlet and outlet = 22 mm ID hose
1
1 / " BSP female thread flexible exhaust pipe
2
Engine (All Fuel Connections Supplied)
Fuel injectors
5. Fuel lines and hoses connecting the fuel tank to the
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 detailed in standard
ISO7840:1995/A1:2000 and/or as required by your
surveyor / authority.
6. Any fuel leaks in the system when static are likely to
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.
18
Fuel injection
pump
Fuel filter
Fuel lift pump