Kohler 4EOZ User Manual

TP-6137 5/03 19Section 5 Fuel System
Section 5 Fuel System
5.1 General
Fire.
Can cause severe injury or death.
Do not smoke or permit flames or
sparks near fuels or the fuel system.
WARNING
Combustible materials. A sudden flash fire can cause
severe injury or death. Do not smoke or permit flames or
sparks near the fuel system. Keep the compartment and the
generator set clean and free of debris to minimize the risk of
fire. Wipe up spilled fuels and engine oil.
In most installations, both the generator set and the
propulsion engine operate from a common fuel tank with
a dual dip tube arrangement. The generator set dip tube
is shorter than the propulsion engine’s dip tube. With
this arrangement, fuel may not be available to the
generator set when the fuel supply is low.
Description
An electric fuel pump draws fuel from the tank. The fuel
flows in the fuel supply line, through the electric pump,
the filter, the engine stop solenoid, and then reaches the
fuel injection mechanical pump.
The injection pump pushes the fuel from the nipple valve
to the injector. The injector ejects and atomizes the
required fuel at high pressure before the piston reaches
TDC. Any excess fuel returns to the tank. The rubber
pipe located between the mechanical pump and the
injector’s banjo return bolt allows for bleeding air from
the fuel system.
1. Fuel tank
2. Electric fuel pump
3. Fuel supply line
4. Fuel filter
5. Stop solenoid
6. Air bleeding pipe
7. Injector assembly
8. High pressure fuel line
9. Fuel injection pump (mechanical)
10. Fuel return line
1
2
3
5
4
6
7
8
9
10
Figure 5-1 Fuel System Schematic Typical
5.2 Fuel Specifications
Use a clean, good quality diesel fuel oil with a cetane
number of 45 or greater. Clean fuel prevents diesel fuel
injectors and pumps from clogging.
Fuel Recommendation
D
I
N
5
1
6
0
1
D
I
N
5
1
6
0
1
(
A
S
T
M
D
9
7
5
6
7
I
D
+
2
D
/
B
S
2
8
6
9
1
9
6
7
A
1
+
A
2
)
(
A
STM D 975--67 ID + 2D
/
BS 2869 1967
A
1+
A
2)
Note: Never store diesel fuel in galvanized containers;
diesel fuel and the galvanized coating react
chemically to produce flaking that quickly clogs
filters or causes fuel pump or injector failure.
Avoid storing fuel for more than one month. Take special
precautions to keep all dirt, water, and other
contaminants out of fuel to prevent the growth of
microbes. Microbes form slime that clogs the fuel filter
and lines.
Do not run the generator set out of fuel because the fuel
lines will draw in air and necessitate bleeding the fuel
system before restarting the unit.

Kohler 4EOZ Specifications

General

Brand	Kohler
Model	4EOZ
Category	Marine Equipment
Language	English