Fuel Supply And "Leak Off; Engine Connections - 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 pump connections are is 22 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
9
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 = 22 mm ID hose
Flexible rubber exhaust pipe of correct quality = 50 mm ID hose
Engine inlet and outlet = 22 mm ID hose
1
1 / " BSP female thread flexible exhaust pipe
2
Engine (All Fuel Connections Supplied)
Fuel injectors
Fuel filter
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 set 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.
9
Fuel injection
pump
Fuel lift pump