DeWalt DW168F - Spark Plug; Spark Arrester; Valve Clearance

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
 2.Removeoilfill/dipstickandwipeclean.
 3.Reinsertoilfill/dipstickfullyintooilfillport
PATTERNS
PATTERNS
and tighten. Allow oil to collect on the
dipstickforafewseconds.
 4.Remove oilfill/dipstick toreadoillevel. If
oil falls below top of pattern on dipstick,
add oil.
NOTE: When filling the crankcase, allow
theoiltoflowveryslowly.Iftheoilisaddedtooquickly,itwilloverflowandappeartobe
full.
 5.Replacedipstickandtightensecurely.
TO CHANGE OIL
NOTE: Engine oil contains substances that are regulated and must be disposed of in
accordance with local, state, provincial and federal laws and regulations.
 1.Disconnectsparkplugwire.
 2.Locateasuitablecontainerunderoildrainplug(Q9).
 3.Removetheoilfill/dipstick(J9)fromcrankcase.
J9
Q9
4. Remove the oil drain plug.
5. Allow ample time for all oil to drain out.
6. Install the oil drain plug and tighten securely.
7. Fill with recommended oil. Refer to the Viscosity-
Ambient Temperature Chart for recommended oil.
NOTE: Synthetic oil is NOT recommended.
˚F -20 0 20 40 60 80 100
˚C -28.8 -17.7 -6.6 4.4 15.5 26.6 37.7
5W-30
10W-30
30
VISCOSITY-AMBIENT TEMPERATURE CHART
 8.Replacedipstickandtightensecurely.
 9.Reconnectsparkplugwire.
10. Dispose of oil according to local, state, provincial and federal laws and regulations.

Userecommendedsparkplugs,seeSparkPlugCrossReferenceforcorrectsparkplug.
Toensureproperengineoperation,thesparkplugmustbeproperlygappedandfreeof
deposits.
WARNING: If the engine has been running, the muffler and spark plug will be very hot.
To reduce the risk of injury, allow cooling before proceeding.
WARNING: Always wear certified safety equipment: ANSI Z87.1 eye protection (CAN/CSA
Z94.3) with side shields.
SPARK PLUG CROSS REFERENCE
BRAND PART NUMBER
NGK BP6ES, BPR6ES
AUTOLITE 63
AC DELCO R41XL,R42XLS, R43FS,R43XL, R43XLS, R44XLS, R45XLS
CHAMPION RJ14YC
 1.Removethesparkplugboot.
 2.Cleananydirtfromaroundthesparkplugbase.
 3.Useasparkplugwrench(notsupplied)toremovethesparkplug.
 4.Visuallyinspectthesparkplug.Replaceitiftheinsulatoriscrackedorchipped.Clean
thesparkplugwithawirebrushifitisgoingtobereused.
5. Measure the plug gap with the feeler gauge. Correct as necessary by
carefully bending the side electrode. The gap should be: 0.70-0.80 mm
(0.028-0.031in).
 6.Makesurethespark plug washerisingoodcondition.Thread the spark
plug in by hand to prevent cross threading.
 7.Afterthesparkplugisseated,tightenwithasparkplugwrenchtocompress
thewasher.Ifinstallinganewsparkplug,tightenthesparkplug1/2turn
after it seats to compress the washer. If reinstalling a used spark plug,
tighten1/8–1/4turnafterthesparkplugseatstocompressthewasher.Do
not overtighten.
NOTE: Thesparkplug must be securely tightened. Animproperlytightenedspark plug
canbecomeveryhotandcoulddamagetheengine.Neverusesparkplugswhichhavean
improperheatrange.Useonlytherecommendedsparkplugsorequivalent.

WARNING: DO NOT operate engine without muffler cover or spark arrestor.
WARNING: If the engine has been running, the muffler will be very hot. To reduce the
risk of injury, allow engine to cool before proceeding.
WARNING: Always wear certified safety equipment: ANSI Z87.1 eye protection (CAN/CSA
Z94.3) with side shields when removing carbon deposits.
NOTE:Thesparkarrestermustbeservicedevery100hourstomaintainitsefficiency.
R12
CC
 1.Removethesparkarrestorscrews(R12)andremovethesparkarrestor(CC).
 2.Usebrushtoremovecarbondepositsfromthesparkarresterscreen.Inspectthespark
arresterscreenforholesortears.Replacethesparkarresterifnecessary.

WARNING: Hot surfaces. Risk of burn. Engine and surrounding parts are very hot, do not
touch. Allow engine to cool prior to servicing.
NOTE: Enginemustbecoldtocheckthevalveclearance.
1. Remove the cylinder head cover.