7-9
Exhaust Tail Pipe
The exhaust tail pipe is customer supplied.
1. Use 16-gauge 1-3/8 inch O. D. aluminized
steel tubing or material of equivalent heat and
corrosion resistance for the tail pipe. Do not use
flexible pipe, which is neither gas tight nor dura-
ble. Clamp the tail pipe to the muffler outlet with
a U-bolt muffler clamp (available from Onan).
Support a tail pipe longer than 1-1/2 feet
(457 mm) near its end and at intervals of 3 feet
(900 mm) or less. Use automotive-type tail pipe
hangers (available from Onan). Do not attach
the hangers to combustible material such as
wood.
2. Use U-bolt muffler clamps (available from
Onan) to connect sections of tail pipe. Overlap-
ping pipe should be slotted (Figure 7-7).
3. Do not route the tail pipe near fuel lines or fuel
tanks.
4. Do not route the tail pipe closer than 3 inches
(76 mm) to combustible material (wood, felt,
cotton, organic fibers, etc.) unless it is shielded.
The temperature rise (above ambient) on adja-
cent combustible material must not exceed
117
°F (65°C).
5. Do not route the exhaust tail pipe underneath
the oil drain or air inlet such that it will restrict
genset cooling air.
WARNING
A hot exhaust tail pipe can ig-
nite oil drain spills causing severe personal
injury or death. Do not route the exhaust tail
pipe underneath the oil drain.
6. To keep the tail pipe from being damaged, do
not route it such that it protrudes into the ap-
proach or departure angles of the vehicle or be-
low the axle clearance line (Figure 7-8).
3/4 INCH (19 MM)
MAXIMUM SLOT
(BOTH SIDES)
FIGURE 7-7. EXHAUST TAIL PIPE CONNECTIONS
DEPARTURE
ANGLE
APPROACH
ANGLE
AXLE CLEARANCE
LINE
FIGURE 7-8. VEHICLE CLEARANCES
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