Generac Power Systems 91355 - Manual (Page 18)

EXHAUST SYSTEM
The generator exhaust system must be safely and
properly installed. Only approved mufflers and other
exhaust system parts must be used. A properly
installed exhaust system must be vapor tight, quiet
and completely safe.
CAUTION: Never tee the generator engine exhaust
pipe into the vehicle engine exhaust piping. This
causes excessive back pressure on the generator
engine. Also, water from one engine can damage
the other engine.
DANGER: THE GENERATOR ENGINE GIVES OFF
DEADLY CARBON MONOXIDE GAS THROUGH ITS
EXHAUST SYSTEM. THIS DANGEROUS GAS, IF
BREATHED IN SUFRCIENT CONCENTRATIONS, CAN
CAUSE UNCONSCIOUSNESS OR EVEN DEATH. SYMP­
TOMS OF CARBON MONOXIDE POISONING ARE (a)
INABILITY TO THINK COHERENTLY, (b) VOMITING, (c)
TWITCHING MUSCLES, (d) THROBBING IN TEMPLES,
(e) DIZZINESS, (f) HEADACHE, (g) WEAKNESS AND
SLEEPINESS. IF ANY OF THESE SYMPTOMS ARE
EXPERIENCED, MOVE INTO FRESH AIR IMMEDIATELY.
IF SYMPTOMS PERSIST, GET MEDICAL ATTENRON.
DO NOT OPERATE THE GENERATOR UNTIL ITS
EXHAUST SYSTEM HAS BEEN INSPECTED AND
REPAIRED.
MUFFLERS AND SPARK ARRESTORS
If the generator is not equipped with a spark arrestor
exhaust muffler and is to be used on any forest cov­
ered, brush covered or grass covered unimproved
land, you may have to install a spark arrestor. The
spark arrestor must be maintained in effective work­
ing order by the vehicle owner/operator.
For assistance in ordering, installing and maintaining
spark arrestor exhaust mufflers, contact your nearest
authorized service facility.
Exhaust mufflers supplied by Generac are spark
arrestor types. Generac exhaust mufflers for NP and
Q series generators do not have a spark arrestor
screen, but are of the more efficient “toroid” or “swirl”
type. To remove carbon and combustion deposits
from such mufflers, remove the PLUG from muffler
and run engine for about 15 minutes. Shut down, let
the muffler cool and install the plug.
WARNING: BE SURE TO RE-INSTALL THE PLUG
FROM THE MUFFLER TIGHTLY. ENGINE VIBRA­
TION COULD CAUSE A LOOSE PLUG TO FALL OUT.
WITHOUT THE PLUG IN PLACE, HOT ENGINE
EXHAUST IS DIRECTED OUT THE OPENING. THIS
HOT EXHAUST, DEPENDING ON THE INSTALLA­
TION, COULD BE DIRECTED TO AREAS NOT ABLE
TO WITHSTAND THE EXTREME HEAT SUCH AS
WOODEN FLOOR BOARDS OR OTHER FLAMMA­
BLE MATERIALS. THIS COULD RESULT IN A FIRE.
A
TYPE OF EXHAUST SYSTEM
Two types of exhaust systems for “NP” and “Q” series
generators are available from Generac. They include
these;
• “Out-the-bottom” exhaust system, Model 9742 (Figure
21
). '
• “Out-the-side” exhaust system, Model 9743 (Figure 22 on
Page 17).
NOTE: No matter what type of exhaust kit best fits
your recreational vehicle, the mounting base has
openings for either “bottom-ouf or “side-out exhaust
systems. Use the cover plate provided with the gen­
erator to cover the opening you do NOT use.
Figure 21 — Model 9742 Exhaust System
ITEM PART NO. DESCRIPTION QTY
52108 Rinffler r
2 46591 Hanger 1
3 28238 U-Bolt 3
4 28237 Clamp, Saddle 3
5 22129 Lock\Vasher 6
6 22259 5/16”Hex Nut 6
7 75238 Pipe 1
8 75411 Elbow 1
9 77643 Gasket 2
10 77642 Adaptor, Bottom Out 1
11 68527 M6-1.0 X 20mm Screw 2
16
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