Carburetor; Engine Air Cleaner; Chassis Electrical System - GMC MOTORHOME 1978 Operating Manual

Carburetor idle speed .
Carburetor mounting torque .
Carburetor choke mechanism and choke
hoses.
Fuel filter.
CARBURETOR
To obtain maximum engine performance and
fuel economy, the following items should be
checked or replaced as recommended in the
Maintenance Schedule folder :
NOTICE:
Refer to Tune-up label on engine
for correct specifications .
NOTICE:
Tightening fuel inlet nut
beyond specified torque can damage
nylon gasket .
FILTER REPLACEMENT
To replace carburetor filter, disconnect fuel
line, remove filter nut, gasket, filter, and spring.
Install spring and element (open end of filter
facing toward filter nut) . Install gasket ; tighten
fuel inlet nut . Do not exceed 18 foot-pounds
torque . Reconnect fuel line and tighten fuel line
nut. Do not exceed 18 foot-pounds torque on
fuel line nut. Then, with engine running, check
for fuel leaks.
ENGINE AIR CLEANER
The air cleaner is a disposable type element.
Replace the element as specified in the Mainte-
nance Schedule folder . Do not wash, oil, or clean
Fuel Filter Components
10 2
with air hose. The air cleaner will require more
frequent service under dusty conditions. Your
GMC Motorhome dealer can advise you on the
proper interval . When replacement is necessary,
an AC ACron air filter element is recommended .
NOTICE:
If the air cleaner is removed
during repair or maintenance, be sure
to put it back on correctly. Without the
air cleaner on, the engine may backfire
and cause a fire in the engine comport-
ment .
CHASSIS ELECTRICAL SYSTEM
FREEDOM BATTERY
Your new vehicle is equipped with a Delco
FREEDOM battery. It needs no periodic main-
tenance . Its top is permanently sealed and has
no filler caps. Water will never have to be added.
The test indicator (if so equipped) on the
top of the battery provides information for test-
ing purposes only. For full power needs, a Delco
battery is recommended at replacement time.
DISTRIBUTOR
Distributor maintenance, which is the owner's
responsibility, includes regular examination of
the distributor cap for cracks, checking condition
of ignition wires, and adjustment to proper
ignition timing at specified intervals . Refer to
the Maintenance Schedule folder for additional
information.
Removing Engine Air Cleaner Element