Clean
up
fuel spills
Immediately.
Raw
fuel
spilled on
the
motor
horne
could
damage
the
exterior
finish,
;:lnd
is
oJ
serious
fire hazJrd.
Fuel Types
And
Vapor Lock
Today's
automotIve
fuel and
emissions
systems
are
sophistlc3ted and highly engineered
to
meet
Federal
and
state
emissions
standards.
They
are also
sometimes
sen-
sitive to fuel types
and
blends, particularlv blends that
are
optimized
for
climatic
conditions. Fuel refiners change
the additives in the fuel to compensate for temperature
variations
during
winter
or
summer
months.
This
com-
pensation changes the
"vapor
pressure" of the
fuel.
This
means
that
the fuel vaporizes easier during the winter
than
it
does
during
the summer
when
higi"\er
air
temperatures help the fuel vaporize in the engina Since
colder temperatures reduce the fuel's ability to vaporize
and
burn
in your engine, additives help raise the volatili·
ty of
the
fuel.
This
helps the engine
start
easier and
run
smoother
during
winter
months.
Under
the best of
conditions, the refiners supply their gas station customers
with
the
correct fuel for their location and seasonal con-
ditions.
Sometimes
though, fuel blended for winter
is
supplied during
summer
months.
What
this all means is
that
there is a possibility of
"vapor
lock"
during
summer driving.
This
condition
is
a
combination
of
new
engine design
(with
attendant
higher temperatures under the hood), and excessive fuel
vaporization
caused
by
the
vapor pressure of the fuel
you are using,
If
your engine and fuel system
are
pro·
perly
tuned
and maintained, you should
not
experience
vapor lock.
If
vapor
lock
occurs, the fuel itself could
be
the
cause.
If
at
all possible, check
with
the gas sta-
tion
attendant
as
to
the fuel blend 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,
Another
note
on
long storage -
if
you
plan to store
your
motor
home
for a long period in conditions of widely
varying humidity, consider topping
off
the fuel tank. This
will reduce the. buildup
of
condensation
in
.the tank that
could cause
rough
engine opera.lion. fuel, filter blockage, .
.or
other
problems
associated
with
water
in the fuel.
NOTE:
.
DURING
EXTENDED
.PERIOPS
OF
STORAGE
(60
DAYS
OR
MORE), GASOLINE MAY
DETERIORATE DUE
TO
OXIDATION.
nUS
CAN
DAMAGE. RUBBER AIIID OTHER MATERIALS
IN
THE FUEL SYSTEM SUCH AS CARBURETOR AC·
CELERATOR
PUMP,
DIAPHRAGMS,
AND
CAR·
BURETOR INLET VALVES.
IT
MAY
ALS.o
CLOG
SMALL
ORIFICES.
A COMMERCIALLY AVAILABLE GASOLINE
FUEL
STABILIZER
MAY
BE
ADDED
TO
GASOLINE·
POWERED VEHICLES WHENEVER ACTUAL
OR
EXPECTED
STORAGE
PERIODS
EXCEED
60
DAYS.
FOLLOW THE ADDITIVE MANUFACTURER'S IN·
STRUCTIONS.
OPERATE
THE
VEHICLE REGULAR·
LY
DURING THE
STORAGE
PERIOD
TO
MIX
AND
CIRCULATE
THE
ANTI·OXIDANT
AGENT
THROUGHOUT
THE
FUEL
SYSTEM.
Alternative
Fuel Types
Gasohol, a
mixture
of ethanol (grain alcohol!. or
methanol and gasoline may
be
used
in
your motor home
engine
without
voiding the warranty. However,
DO
NOT
UNDER
ANY
CIRCUMSTANCES
USE
FUEL BLENDS
CONTAINING MORE THAN
5%
METHANOL
OR
10%
ETHANOL.
AND
DO
NOT
USE
BLENDS THAT CONTAIN
BOTH
METHANOL
AND
ETHANOL
Any fuel
blend
you
use containing alcohol
must
also contain cosolvents and
other additives to protect the fuel system components.
If you are
not
sure of the composition
of
the
alcohol/gasoline blend you intend to use. ask
your
ser-
vice
station
operator.
Discontinue
use
of
any
alcohol/gasoline blend if driveability
or
fuel system pro·
blems occur.
Chemical reactions between the fuel components and
the
materials in
the
fuel lines can cause deterioration
of
the fuel lines during storage periods. These
effects
are
especially noticeable
with
gasohol blends. If
you
plan
to
use alcohol blended fuel. and expect
to
store. your
motor
home
for
periods
of
60
days or more. add a fuel
additive
that
is formulated to counteract these oxida-
tion effects. Your dealer can advise you
on
the proper
additives and
their
usa
If
gasohol is spilled on a painted surface, some dull·
ing or soften
inc;
of
the paint
may
result.
Overheating
Operate and service the engine and cooling systems
in your vehicle
as
recommended in the Chassis
Operator's Manual.
Variable
Speed
Engine Fan
Your
motor
home
engine is equipped
with
a variable
. speed
fa[1
clutch.
W,hen the engine is under load
or
re-
quires maximum cooling. tbe' fan adjusts and turns faster.
.The
fan
may become very noisy at high. speed and
when
maximum
cooling is' requin;!d. Whe'n the engine
doesn't
need maximum'·cooling" the fan
just
idles along. This
'conserves fuel
.andihe
fan is .Iess noisy.
10
High speed fan noise can sometimes
be
misinterpreted
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 con-
ditions, such as pulling away from a stop after long
freeway driving, can cause loud fan noise until the engine
cools
down.
This fan noise indicates that the fan
IS