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This engine is only for use in DeWALT approved applications. If
used in unapproved applications, D
eWALT is not responsible for
repairs or damage and the warranty if void. Call 1-800-4-D
e
WALT
(1-800-433-9258) for more information.
PROCEDURE
100 hours
50 hours
(whichever
comes first)
150 hours
(whichever
comes first)
500 hours
Clean air filter (3)
X
Check oil level
X
Change oil (1,2,3)
X
Clean spark plug
X
Cleanengine’sexterior
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 DeWALT shop manual for detail instructions. To order a shop
manual call 1-800-4-D
eWA LT.
3.
Perform more frequently in dusty or humid conditions
WARNING: Hot surfaces. Risk of burn. Engine and surrounding
parts are very hot, do not touch (see the Hot Surfaces identified in
Figure 1). Allow engine to cool prior to servicing.
A dirty air cleaner will restrict airflow to the carburetor. To prevent
carburetor mal func tion, service the air filter regularly. Service more
frequently when operating the engine in extremely dusty areas.
WARNING: Using gasoline or flam mable solvent to clean the filter
element can cause a fire or explosion.
WARNING: Risk of fire. Do not operate without air filter.
TO CLEAN THE ELEMENTS
DW168F-2E, DW177F-E, DW168F-2H, DW177F-H
1. Remove the wing nut (Y)
Y
X
Y
Y
AA
Z
and the air filter
cover
(X)
.
2. Remove the second wing
nut (Y) and remove the
filter (Z).
3. Remove the foam-type
pre-filter (AA) from the
filter (Z).
4. Inspect foam and paper
elements. Replace them if damaged.
TO CLEAN THE ELEMENTS
Wash element in warm, soapy water. Then saturate
it in clean engine oil. Squeeze the element to remove excess oil.
Clean element by tapping gently to remove dust.
Use compressed air to blow off dust.
WARNING: When using compressed air, user always must wear
eye protection that conforms to ANSI Z87.1. (CAN/CSA Z94.3).