Service Spark Plug; Clean Engine - Craftsman 247.770990 Operator's Manual

2. Removepleatedfilter from plastichousingcoverand replacewith
cleanor newfilter.
3. Tilt cover up into placeand tightenscrew.
NOTE:If thefilter istorn or damagedin anyway,replaceit.
_ ARNING:Temperature of muffler and nearbyareas
may exceed 150 ° F (65°C). Avoidthese areas.
SERVICE SPARK PLUG
Cleanthespark plug and resetthe gap to .030"at least oncea season
or every50 hoursof operation.See Figure15.Sparkplug replacement
is recommended at the start of eachseason.Referto engineparts list
for correctspark plug type.
NOTE:Do notsandblastspark plug.Sparkplug shouldbe cleanedby
scrapingor wire brushingand washingwith a commercial s olvent.
f --,,
2 3
II
II
II
II
II
II
1..030 (.76 turn) Gap
2. Electrodes
3. Porcelain
Figure 16
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SERVICE MUFFLER
• Inspectmufflerperiodically, a nd replaceif necessary.
• If yourengineis equippedwith a spark arresterscreenassembly,
removeafter every 50 hoursof use for cleaningand inspection.
Replaceif damaged.
_ ARNING:Do not operate the YardVacuum without
a muffler or tamper withthe exhaustsystem.
Damaged mufflers or spark arresters could create a
fire hazard.
CLEAN ENGINE
• Cleanengineby removingdirt and debriswith a cloth or brush.
Frequentlyremovegrass clippings,dirt, and debrisfrom cooling
fins,air intakescreen,levers,and linkage.This will help ensure
adequatecoolingand enginespeed.
15