9
English
High altitude operating
At high altitude, the standard carburetor air-fuel mixture will be too
rich. Performance will decrease and fuel consumption will increase.
A very rich mixture will also foul the spark plug and cause hard
starting.
High altitude performance can be improved by specific modifica
-
tions to the carburetor. If you always operate your engine at altitudes
above 1,524 meters (5,000 feet), have your authorized service cen
-
ter perform a carburetor modification.
Even with a carburetor modification, engine horsepower will decrease
about 3.5% for each 300 meter (1,000 feet) increase in altitude. The
effect of altitude on horsepower will be greater than this if no car
-
buretor modification is made. A decrease in engine horsepower will
decrease the power output of the engine.
notE:
When the carburetor has been modified for high altitude
operation, the air-fuel mixture will be too lean for low altitude use. If
the engine is used at low altitudes after a carburetor modification, the
carburetor may cause the engine to overheat and result in serious
engine damage. For use at low altitudes, have your authorized ser
-
vice center return the carburetor to original factory specifications.
maIntEnanCE
WARNING:
When cleaning, use only mild soap and a damp cloth
on plastic parts. Many household cleaners contain chemicals which
could seriously damage plastic. Also, do not use gasoline, turpen-
tine, lacquer or paint thinner, dry cleaning fluids or similar products
which may seriously damage plastic parts. Never let any liquid get
inside the engine; never immerse engine into a liquid.
The following procedures must be followed when maintenance or
service is performed on the engine.
Any service operations not included in this section should be performed
by a D
e
WALT factory service center or a D
e
WALT authorized service
center.
This engine is only for use in D
e
WALT approved applications. If used
in unapproved applications, D
e
WALT is not responsible for repairs or
damage and the warranty if void.
maintenance Chart
procEDurE
d
ail
y
100
hour
s
50
hour
s
or
weekl
y
(w
hic
he
ve
r
comes
first)
150
hour
s
or
monthl
y
(w
hic
he
ve
r
comes
first)
500
hour
s
Clean air filter (3)
X
Check oil level
X
Change oil (1,2,3)
X
Clean spark plug
X
Clean engine’s exterior
X
Check and adjust valve clearance
(.15 mm intake, .2 mm exhaust) (2)
X
Clean spark
arrester (if equipped)
X
Clean debris screen (if equipped)
X
1. The engine oil must be changed after the first 20 hours of
operation. Thereafter change oil every 150 hours of operation
or monthly, whichever comes first.
2. See D
e
WALT shop manual for detail instructions.
3. Perform more frequently in dusty or humid conditions
Summary of Contents for DW13LAG
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