A.GapIftheplugisoilyorhascarbonbuiltuponit,re-placeit.Ifthesparkplugelectrodesarecorroded,ordamaged,oriftheinsulatoriscracked,replacetheplug.Thestandardsparkplugisshowninthetablebelow.StandardSparkPlugNGKSILMAR9F9seatrearward.●Removetheaircleanercover(seepage62).●Removetherightsidecover(seepage99).Thesparkplugshouldbetakenoutperiodicallyforinspection.Measurethegapwithawire-typethicknessgauge.incorrect,replacethesparkplug.SparkPlugGapIf0.8–0.9mm(0.031–0.035in.)○Iftheengineperformancedrops,tryreplacingthesparkplugtoregainperformance.A.SeatBolt(BothSides)B.SeatC.UpwardD.RearwardSparkPlugRemovalandInstallation●Removetheseatbolts.●Lifttherearpartoftheseatupwardandslidethe54MAINTENANCEANDADJUSTMENTSparkPlugNOTE
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