FUEL SYSTEM
Page FUEL SYSTEM-4
Z001007/0_4_September 2007
INSTALLATION INSTRUCTION
7. 2. FUEL TANKS
If possible, arrange the fuel tanks at engine level or higher. In case of a lower arrangement, max. suction height
of the feed pump is to be considered which is 1 m for all kinds of engines. Please consider that the suction head
is calculated from the lower end of the suction pipe, i.e. approx. 1" (2,5 cm) over the tank bottom. The return pipe
should lead into the tank at the level of the screen but with some distance to it, to avoid a foam formation of fuel.
In case of arrangement of the tanks at a level lower than the admissible suction height of the feed pump, the fuel
is to pumped up to a daily tank by a manually operated pump or motor pump. In this case, the fuel flowing back
from the engine is pumped into the daily tank.
ill. 7/2
1
water separator, rate of flow > 65 Brit. gl/h (> 300 l/h)
2
fuel stop cock
3
fuel pipe, outside diameter 3/8" (10 mm) for a length of 20 ft (6 m). For longer lines, use a
1/2" (12 mm) pipe.
4
inspection cover
5
filler socket - cover
6
lead-in sleeve made of fuel-resistant rubber, with drain possibility
7
air-vent pipe, diameter at least 1 1/2" (38 mm)
8
guide bulkhead
9
ground connection
10
return pipe
11
suction pipe, complete with screen (distance to tank bottom 1" / 25 mm)
12
anti-siphon valve
NOTE:
If demanded by
THE US COAST GUARD
install a anti-siphone valve which must be
opened by fuel pump suction to withdraw fuel from the tank and which will remain closed without
fuel pump suction, preventing siphon action created by a break at any point in the fuel feed
system.
The valve shall be designed and sized to provide the requiered fuel flow
of 65 Brit.gl/h (300 l/h) to the engine.