Generac Power Systems quietpact 85d, Owner'S Manual

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3.3 SERVICING THE ENGINE
AIR FILTER
To access the engine air filter (Figure 3.2), remove the front service
door, located beneath the unit, by retracting the two latches and
pivoting the door downward. Loosen the hose clamp at the base
of the air filter and remove the filter. Place the hose clamp on the
new filter and install it, making sure it is positioned properly before
reattaching the service door. Make sure the service door latches
are fully engaged.
Figure 3.2 – Engine Air Filter
REMOVABLE FRONT
PANEL TRANSPARENT
FOR VIEWING PURPOSES.
See the “Service Schedule” for recommended air cleaner main-
tenance.
3.4 SPARK ARRESTOR MUFFLER
The exhaust muffler supplied with the generator is a spark arres-
tor type. The exhaust mufflers for recreational vehicle generators
do not have a spark arrestor screen, but are of the more efficient
“toroid” or “swirl” type. To remove carbon and combustion depos-
its from the muffler, proceed as follows (see Figure 3.3):
1. Place the unit above a noncombustible surface, and ensure
that the generator exhaust piping is cool.
2. Remove the two screws holding the spark arrestor access
plate to the rear floor pan.
3. Remove the spark arrestor access plate and gasket.
4. Remove the hex pipe cap from the end of the spark arrestor
cleanout pipe.
5. Thread on a 3/8” NPT pipe coupling and pipe nipple to extend
the cleanout pipe at least 10 inches (250 mm) below the rear
floor pan; additional piping may be added to direct the muffler
exhaust away from the cooling air discharge flow beneath the
unit.
6. Start and run the engine for approximately 15 minutes.
7. Shut down the engine, and allow the piping to cool.
8. Remove the 3/8” NPT coupling and piping.
9. Apply a graphite-base, anti-seize compound to the cleanout
pipe threads.
10. Reinstall the hex pipe cap, spark arrestor access plate, gas-
ket, and two screws.
Figure 3.3 – Spark Arrestor Muffler Maintenance
3/8" NPT HEX
PIPE CAP
GASKET
ACCESS PLATE

The exhaust system of this product gets
extremely hot and remains hot after shut-
down. High grass, weeds, brush, leaves, etc.,
must remain clear of the exhaust. Such mate-
rials may ignite and burn from the heat of the
exhaust system.

Failure to provide and maintain a spark
arrestor may be in violation of the law. If this
generator is used on any forest-covered,
brush-covered, or grass-covered unimproved
land, the vehicle owner or operator must
maintain the spark arrestor in good condi-
tion. In the state of California, the preced-
ing is required by law (Section 4442 of the
California Public Resources Code). Other
states may have similar laws. Federal laws
apply on federal lands.

Be sure to reinstall the hex pipe cap tightly
to the spark arrestor cleanout pipe. Vibration
could cause a loose cap to fall out, resulting
in hot engine exhaust being drawn through
the centrifugal cooling fan and out beneath
the unit. This could result in damage to the
generator or in discharge of hot exhaust
sparks beneath the unit.
Maintenance