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before filling your fuel tank. If you purchase your fuel
from nationally recognized fuel dealers, your chances
of vapor lock can be reduced. If you store your motor
home during the winter months, avoid storing large
quantities of winter blended fuel in the tank. When
you take the vehicle out of storage in the spring or
summer, this fuel may cause vapor lock until it is used
up.
Alternative Fuel Types
Gasohol, a mixture of 10% ethanol (grain alcohol)
and 90% gasoline may be used in Chevrolet gasoline
engines without voiding the warranty. However,
because of the composition of gasohol, engines will
tend to operate leaner with gasohol than with gasoline.
This can result in driveability conditions usually
associated with leaner mixtures. Also, the increased
volatility of gasohol can contribute to hot weather
driveability problems (vapor lock) if adjustments are
not made to the gasoline blend during the refining
process.
The higher octane rating of gasohol compared to
most unleaded gasolines could help reduce the tenden-
cy for spark knock. But, gasohol contains less energy
than gasoline, and fuel economy mayor may not be
quite as good . However, in some instances depending
on the engine design and calibrations, and certain
operating conditions, it is possible to get improved fuel
. economy. Exhaust emission levels may change up or
down with the use of gasohol, again, depending on
the calibration of the engine. At the present time
however, the EPA has not restricted the use of
gasohol.
If gasohol is spilled on a painted surface, some dull-
ing or softening of the paint may result.
Overheating
The engine and cooling system in your vehicle
should be operated and serviced as recommended in
your Chassis Operator's Manual.
Variable Speed Engine Fan
The Chevrolet chassis is equipped with a variable
speed fan clutch. When the engine is under load or
requires maximum cooling, the fan suddenly adjusts
and turns faster. The fan requires a lot of horsepower,
and becom.es very noisy at high speed. Maximum cool-
ing is required only a small percentage of the time.
When the engine doesn't need maximum cooling, the
fan just idles along. This conserves fuel and the fan
is less noisy.
High speed fan noise can sometimes be misinter-
preted as transmission slippage. This is not the case.
When the engine is hot and requires extra cooling, the
fan turns at full speed. High engine speed and
temperature conditions, such as pulling away from a
stop after long freeway driving, can cause loud fan
noise until the engine cools down. This fan noise in-
dicates that the fan is doing what it is supposed to
18
do. This noise is not a defect in the fan or the
transmission.
CARBON MONOXIDE
SAFETY PRECAUTIONS
Carbon monoxide is a colorless, tasteless, odorless
gas. It is a by-product of combustion in engine(s). The
engines in your motor home and generator system pro-
duce it constantly while they are running. CARBON
MONOXIDE IS DEADLY. Please read and understand
the following precautions to protect yourself and
others from the effects of carbon monoxide poisoning.
WARNING: EXHAUST GASES ARE DEADLY. DO
NOT BLOCK THE TAILPIPES OR SITUATE THE
VEHICLE IN A PLACE WHERE THE EXHAUST
GASES HAVE ANY POSSIBILITY OF ACCUMU-
LATING EITHER OUTSIDE, UNDERNEATH, OR IN-
SIDE YOUR VEHICLE OR ANY NEARBY VEHICLE
THROUGH WINDOWS OR OTHER OPENINGS
REMOTE FROM THE EXHAUST OUTLET.
OPERATE THE ENGlNE(s) ONLY WHEN SAFE
DISPERSION OF EXHAUST GASES CAN BE
ASSURED, AND MONITOR OUTSIDE CONDITIONS
TO BE SURE THAT EXHAUST CONTINUES TO BE
DISPERSED SAFELY.
Beware of exhaust gas (carbon monoxide) poison-
ing symptoms:
, Dizziness
Intense Headache
Weakness and Sleepiness
Vomiting
Muscular Twitching
Throbbing in Temples
If symptoms indicate the possibility of carbon
monoxide poisoning, turn off the engine immediate-
ly, get out into fresh air at once, and summon medical
assistance.
WARNING: DO NOT UNDER ANY CIRCUM-
STANCES OPERATE ANY ENGINE WHILE
SLEEPING.
You would not be able to monitor outside conditions
to assure that engine exhaust does not enter the in-
terior, and you would not be alert to exhaust odors
or symptoms of carbon monoxide poisoning.
After traveling, inspect the exhaust systems for road
damage before starting any engine.
Check the exhaust system during routine main-
tainance, and repair any leaks, damage, or obstruc-
tions before further operations.
Do not modify the exhaust system in any way
without first consulting the RV manufacturer.
SAFETY TIPS
Read and understand the Chassis Operator's
Manual.
When backing the motor home, have a person stand
to the rear on the driver's side to guide you.
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Troubleshooting
