8-4
2. Install the genset housing and reinstall the gen-
set.
3. If replacing the original exhaust tailpipe, refer
to the Tailpipe Recommendations section.
4. Attach the exhaust pipe to the exhaust outlet
using a U-bolt type automotive muffler clamp
marked 1-3/8 inch I.D. (Spec A) or 1-1/4 inch
I.D. (Begin Spec B).
5. Attach an automotive type tailpipe hanger ev-
ery 2 to 3 feet (0.6 to 0.9 meters). In addition,
the exhaust system must be supported at or
near the perimeter of the vehicle to prevent the
tailpipe from being damaged and being pushed
up under the vehicle skirt.
CAUTION
Excessive vibration transfer
and exhaust pipe damage can be caused by
angular mounting. Tailpipe hanger clamps
must be mounted directly above the com-
ponent being supported and not at an
angle.
6. Run the genset for five minutes and check the
entire exhaust system (visually and audibly) for
leaks or excessive noise. Correct any prob-
lems immediately.
Tailpipe Recommendations
Tailpipes must meet several design specifications
to provide safe genset operation. If replacing the
tailpipe, make certain the replacement part is the
same size and configuration as the original part.
Refer to the following guidelines for selecting and
locating the tailpipe.
WARNING
Inhalation of exhaust gases can re-
sult in severe personal injury or death. Exhaust
gases can enter the vehicle interior if the tail-
pipe is damaged, missing, or improperly
installed. Follow the recommended exhaust
system replacement procedures.
Spec A:
Use 1-1/2 inch O.D., 18-gauge aluminized
or stainless steel tubing for tailpipe.
Begin Spec B:
Use 1-1/4 inch O.D. (1-1/8 inch I.D.)
18-gauge aluminized steel or stainless steel tubing
for tailpipe.
Do not use flexible tailpipe since it might break due
to road shock and vibration.
WARNING
Hot exhaust components present
the risk of fire that can result in severe personal
injury, death or equipment damage. Follow the
recommended clearances between the exhaust
system and any combustible materials.
The exhaust system must be placed no closer than
3 inches (76 mm) from combustible material (wood,
felt, cotton, organic fibers, etc.), or be so located, in-
sulated or shielded that it does not raise the temper-
ature of any combustible material more than 117
° F
(65
° C) above the ambient air inlet temperature.
The exhaust system must extend a minimum 1 inch
(25 mm) beyond the perimeter of the vehicle. Do not
terminate the exhaust tailpipe under the vehicle. Be
aware that any vent, window, storage compartment
or opening that can be opened and that is not per-
manently sealed from the vehicle living space can
be an avenue for carbon monoxide.
The tailpipe must not terminate so that any vent,
window, or opening into the living area is within a six
inch (152.4 mm) radius of the tail pipe as shown in
Figure 8-3 on Page 8-5.
WARNING
Exhaust gas presents the hazard of
severe personal injury or death. Do not termi-
nate an exhaust pipe under the vehicle. The tail-
pipe must not terminate so that any vent, win-
dow, or opening into the living area is within a
six inch (152.4 mm) radius of the tail pipe as
shown in Figure 8-3 on Page 8-5. Keep all
openings closed when the genset is running.
To reduce the chance of damaging the tailpipe and
emitting exhaust gases under the vehicle, make
certain that no part of the exhaust system intrudes
into the departure angle or approach angle of the
vehicle, unless it is protected by a skid bar or other
protection device. The shaded areas in Figure 8-3
illustrate typical mounting locations.
WARNING
Exhaust gas presents the hazard of
severe personal injury or death. Do not mount
any portion of the exhaust system into the ap-
proach or departure angle unless it is adequate-
ly protected. Use only Onan-specified exhaust
equipment with the genset. Use a sufficient
number of hangers to prevent dislocation of the
system.
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