Fuel Supply - Beta Marine BV1305 Operation And Maintenance Manual

FUEL SUPPLY & LEAK OFF -
1
9
(1) Fuel tank
(2) Injection pump
(3) Injection nozzle
Notes:
1. The mechanical fuel lift pump is
fitted to all engines as standard,
but if a suction head of 0.25m is
required then an electric fuel lift
pump must be fitted (ask your
dealer or Beta Marine).
2. It is very important that the
excess fuel from the injectors is
fed back to the fuel tank and not
back to any point on the supply
line. This will help prevent air
getting into the system.
3. Fuel pipe sizes are:
A typical system is shown below
12
11
(4) Injection pipe
(5) Mechanical fuel feed
pump with priming lever
(6) Fuel filter
4. Any fuel leaks in the system are
likely to cause poor starting and
erratic running and must be
corrected immediately.
5. A fuel/water separator must be
installed.
6. 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
12. This prevents fuel 'drain
down'.
Supply (mm)
8
8
7
(7) Fuel water separator
(8) Overflow/leak off
(9) Drain plug
Leak off (mm)
8
28
4
2
3
5
(10) Air vent
(11) Stop cock
(12) Fuel pipe loop
7. Fuel lines and hoses must be
secured and separated or
protected from any source of
significant heat. The filling,
storage, venting and fuel supply
arrangements and installations
must be designed and installed
so as to minimise the risk of fire
and explosion. Flexible fuel hoses
connecting the engine to fuel
tank supply and return lines
must meet the requirements set
in standard ISO
7840:1995/A1:2000 and as
required by your surveyor /
authority.
10
6