9
Exhaust Connections
The genset is equipped with a U.S. Forest Service
approved spark-arrest muffler. Failure to provide
and maintain a spark arrestor can be a violation of
the law. Liability for damage, injury and warranty ex-
pense due to the modification of the exhaust system
or to use of unapproved parts is the responsibility of
the person performing the modification or installing
the unapproved parts. Contact an Onan dealer for
approved exhaust system parts.
WARNING
EXHAUST GAS IS DEADLY! Keep
exhaust gases from entering the vehicle. Do not
terminate the exhaust tailpipe underneath the
vehicle or closer than 6 inches (153 mm) to
openings into the vehicle or route it such that it
is not protected. Use approved materials only.
The genset exhaust system must be gas-tight and
designed to prevent entry of exhaust gases into the
vehicle interior. The muffler is mounted inside the
genset and has a collar to which the tailpipe is
clamped (Figure 5).
1. Use 18-gauge 1-1/8 inch I. D. aluminized steel
tubing or material of equivalent heat and corro-
sion resistance for the tailpipe. (Straight and el-
bowed tailpipe kits are available from Onan.)
Do not use flexible pipe, which is neither gas
tight nor durable. Clamp the tailpipe to the muf-
fler with a U-bolt muffler clamp (available from
Onan). Support a tailpipe longer than 1-1/2 feet
(457 mm) near its end and at intervals of 3 feet
(900 mm) or less. Use automotive-type tailpipe
hangers (available from Onan). Do not attach
the hangers to combustible material such as
wood.
2. See OUTLINE DRAWING (Page 21) for the
location of a 5/16-18NC threaded hole in the
base of the genset for attaching a tailpipe hang-
er. The bolt must protrude at least 1-1/2 threads
beyond the base pan weld nut but not more
than 1/2 inch (13 mm), to avoid interference.
3. Use U-bolt muffler clamps (available from
Onan) to connect sections of tailpipe. Overlap-
ping pipe should be slotted (Figure 6).
FIGURE 5. TYPICAL TAILPIPE INSTALLATION
3/4 INCH (19 MM)
MAXIMUM SLOT
(BOTH SIDES)
FIGURE 6. EXHAUST TAILPIPE CONNECTIONS
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by any means, is strictly prohibited.
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