Onan 15.0MDJF-3CR User Manual

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The diesel engine requires a fuel supply line and a separate
fuel return line. Install the fuel return line from the 7/16-24
size opening in the overflow fitting located on the injection
pump (where the nozzle fuel return line is also connp.cted) to
the top of the fuel supply tank (Fig. 5).
Do not use galvanized lines, fittings, or fuel tanks 10 the
fuel system. Carefully clean all fuel system components
before putting the plant into operation.
Any di rt or contam-
inationmay
cause major damage to the fuel injection system.
OIL DRAIN
The oil drain may be extended to suit the installation. The
oil base has a
1/2" pipe tapped hole.
VENTILATION
I
,
PROPUI.SION
ENGINE GENtiHATOR'
,~
BELOW FUEL
PUMP LEVEL
FUEL
RETURN
LINE
-J
FIGURE 4. FUEL LINE ARRANGEMENT
The generating set requires fresh air for combustion and
generator cooling.
Onan recom mends that the vent Hat ion
sy~tem be able to deliver 1-1/2 to 2 times the air required
b~ the set. When the ventilation system depends on wind
or boat motion, use powered exhausters to provide ventila-
tion
when the boat is not in motioh. For more information,
refer to Onan Technical Bulletin T-021.
EXHAUST
, Pipe exbaust gases outside of tbe bull
L!ARNING
- exhaust gases are poisonous!
See Installation, Figures 2 and 3. The engine exhaust
connection
is 1-1/2" pipe tapped.
Install a separate exhaust line as follows:
1. Above vessel load water line.
2. Pitched downward to prevent water backflow.
3. Shield line near combustible material.
4. Use flexible hose or tubing.
5. For turns use sweeping (long radius) elbows.
6. Increase one pipe size for every 10 ft. in length.
Provide a tee for water line connection for wet ex-
CONNECT
FUEL RETURN
LINE HERE
(Flexible Line)
PUMP
: t·
quired forinstaUation.'·; ,0
10
haust (Figure 3) - refer to Water Discharge Line
Instructions. Raise the dry portion of the exhaust
line high enough to prevent water backflowing into
the engine under all co nd itions.
The water jacketed exhaust manifold is pipe tapped
at both ends for convenience in, exhaust line conn,·
ection.
.'-:'.
'\:'
'}i;'
AQUALIFT MUFFLER (Optional) '.
The Aqualift is a highly efficient ma.rine muffler designed for
above or below water line installations when water cooled
exhaust systems are used. Because
of installatiorii,varil:t.iiles,
cus tomer's must .provide the' 'brackets" ,hoses 'anlL clam;ps, ,r&-

Onan 15.0MDJF-3CR Specifications

General

Brand	Onan
Model	15.0MDJF-3CR
Category	Portable Generator
Language	English