Craftsman 247.288870 Operator's Manual page 21

6.
Attachthe airfilter cover, m aking sureto alignplasticrib features onthe
shroudto the plastic features on the airfilter cover. S eeFigure 17. T urn
thumbscrews clockwise untilsnug.Check f or anymisalignment.
Air Filter
Cover
Plastic
Feature
Shroud
k_ Feature
Figure 17
SparkPlugService
Toensureproperengineoperation, t hesparkplugmustbeproperlygapped and
freeofdeposits.
1. Remove t he sparkplugbootandusea sparkplugwrenchto remove the
plug.SeeFigure18.
F
k_ Spark Plug Boot
Figure 18
Spark Plug
J
If the engine hasbeenrunning,the muffler will beveryhot.Becareful not
to touch the muffler.
Measure the plug gapwith afeelergauge. C orrect a snecessary b ybending
sideelectrode. S eeFigure 19.Thegapshouldbesetto 0.024-0.031 i n.
Electrode
J
Figure19
4. Check thatthe sparkplugwasherisingoodcondition andthreadthe spark
plug inby handto prevent c ross-threading.
5. Afterthe sparkplugisseated, t ightenwith asparkplug wrench to compress
the washer.
NOTE: Wheninstalling a newsparkplug,tighten 1/2 turnafter the spark
plug seats to compress t he washer. W henreinstalling a usedsparkplug,
tighten 1/8-1/4turn afterthe sparkplug seats to compress t he washer.
IMPORTANT: Thesparkplugmustbesecurely tightened.Animproperly
tightenedsparkplugcanbecome veryhot andmaydamage the engine.
Muffler
Temperature ofmuffler and nearby engine areasmayexceed150° F(65°C).
Avoidcontactwith theseareas.
Inspect m ufflerperiodically, andreplace if necessary. Replacement parts
forthe mufflermustbethe sameandinstalled i n thesamepositionasthe
originalparts.
CleanEngine
Daily or beforeeveryuse, c leangrass, c haffor accumulated debris from
engine.Keep linkage, s pring,andcontrolsclean.
Keep areaaroundandbehindmufflerfreeofanycombustible debris.
Keeping enginecleanallowsair movement a roundengine.
Engine partsshouldbe keptcleanto reduce t he risk of overheating and
ignition of accumulated d ebris.
Donotusewater to clean engine parts. W atercould contaminate fuel
system.Use a brushor dry cloth.
Carburetor Adjustment
Thecarburetor o n thisengineisnot adjustable.
2.
Visually inspect the sparkplug.Discard the sparkplugif thereisapparent
wear, o r if the insulator iscracked or chipped.Clean the sparkplugwith a
wirebrushifit istobe reused.
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