Fuel
System
Model
60
Hz
50
Hz
GENERAL
This
installation manual covers gasoline and
LPG
(liquid-propane gas)
fuel
systems.
The
Onan
BGE
model
is
gasoline-fueled, and
the
Onan
BGEL
model
is
liquid
LPG
fueled. Separate procedures are given for
each.
No
Load
Half
Load
Full
Load
0-4
gallhr
0.6
gal/hr
0.8
gallhr
(1.5
Ilhr)
(2.3
I/hr)
(3.0
Ilhr)
0.35
gal/hr
0.53
gallhr
0.73
gal/hr
(1.3
Ilhr)
(2.0
Ilhr)
(2.8
Ilhr)
*
b.
Fuel presents the hazard of fire
or
explosion which can result in severe
personal injury or death.
Do
not smoke or allow any
ignition sources in the installation area. Keep a type
ABC
fire extinguisher nearby. The ventilation system of
the installation area mustprovide a constant flow of air
to expelany accumulation of fuel vapor while the vehi-
cle is in transit. Compartments must be vapor tight to
fhe vehicle interior
to prevent any fumes from entering
the vehicle interior.
GASOLINE
FUEL
SYSTEM
.
Fuel System Provisions
Generator set installations may
be
designed to share the
vehicle fuel
supply
tank
with
the vehicle
engine.
AI1
connections to the vehicle
fuel
tank
must
be done
in
accordance with chassis
(vehicle)
manufacturer's
detailed installation instructions. See Fuel
Line
In-
stallation.
The generator set includes a
fuel
shut-off valve as a
safety feature and
is
an integral part of
the
fuel
pump.
Should
the
vehicle fuel tank become pressurized,
the
positive fuel shut-off
prevents
flooding of
the
generator
set
when
the
set
is
not operating.
Forlhe possibility
of
contaminatedfuel, Onanrecommendsan in-line
luel filter.
.
Recommended Fuel
Use clean, fresh, unleaded or regular grade gasoline.
Using
unleaded gasoline
results
in
extended periods
between service, longer spark
plug
life,
and
reduced
carbon. clean-out maintenance.
If
regular gasoline
is
used, lead deposits
must
be
removed from
the
cylinder
heads as required
to
'alleviate engine power loss.
Unleaded gasoline may
be
safely
used
after
lead depos-
its
have been removed.
.
.
Do
not alternate between leaded
k&%!@l
(regular) and unleaded gasoline.
Lead deposits can cause engine damage if
not
removed before using unleaded gasoline.
Fuel Consumption
It
should be noted that
under
varying
electrical loads,
fuel
consumption of
engines
for recreational vehicle
generator
sets
varies accordingly.
Fuel
Line
Installation
Recreational vehicle
fuel systems
are designed to oper-
ate
in
a
critical pressure range. It
is
very
important
dur-
ing
the installation
of
the
generator set that
the
vehicle
fuel
supply
design
NOT
be
altered.
The
fuel
fill
tube,
fill
limiter vent, vapor canister, vapor
lines
and gas
fill
cap
should
never
be changed, removed or replaced
without
PRIOR
approval
from
the vehicle manufacturer. Check
the filler
cap
to
ensure
that the
pressure
vacuum
relief
valve
is
functioning properly. Replace
if
required.
If
separate connection
is
not supplied for the generator,
addasecondfuel pickup inthetank.This pickupshould
not
extend
below the bottom
1
/4
of tank
so
the vehicle
can
still
be
run,
after generator
runs
out of fuel.
.
Do
NOTtee
off
the vehicle fuel
line,
doing
so
may cause
poor operation of the generator or
the
vehicle. Consult
with
vehicle manufacturer for further specifics regard-
ing
ashared fuel
supply.
Unauthorized fuel system mod-
ifications could
result
in
dangerous operating con-
ditions.
ACA~ON
Connecfing fhe generator set fuelline
a
with
a
fee
to
the
main fuel.line
can
resun
in
fhe
generafor set starving for fuel when
ihe
vehicle
is
operated at highway
speeds.
The generafor
set fuelpump has neither the
capacity
nor the power to
overcome fhe
draw
of the vehicle engine fuelpump. Use
a
separafe
fuel
line
for
the generafor set.
Gasolinepresents the hazardof explo-
[-I
sion
or
fire which
can
resulf in severe
personal injury or death.
Do
not connect the generator
set fuel line to the pressurized part of the vehicle fuel
system.
Flooding
of
the generator set engine and
com-
partmenf
can
occur, resulfing in a fire hazard.
tnstall
an
approved,
flexible
non-metallic (non-
conductive) and non-organic fuel
line
between the
veh-
ickfuel
system
and the generator
set
to
absorb vibra-
tion.
Onan recommends using
a
seamless steel tubing
and flared connections for long
runs
between
the
fuel
tank
and
the
flexible
connector to
the
generator set.
Run
fuel
lines at the
same
height as the top
level
of tank
to a point as close to the
engine
as possible.
This
redu-
cesthedangeroffuelsiphoningoutofthetankiftheline
should break.
.
16
Redistribution or publication of this document,
by any means, is strictly prohibited.
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