2002-2009 Suzuki LT-F250 Ozark Service Manual, Page 258Get this manual
SERVICING INFORMATION
ELECTRICAL
Complaint No sparking or poor sparking12345123451234512341231231212312345678910ReplaceReplaceReplaceReplaceReplaceAdjust carburetorAdjust carburetorChangeClean or replaceChange to standard spark plugReplaceWorn piston ringReplaceWorn pistonReplaceWorn cylinderReplaceExcessive valve-stem-to-valve-guide clearanceReplaceWorn valve stem oil sealChange to cold type spark Incorrect spark plugplugTurn-upOverheated engineTightenLoose spark plugAdjust carburetorExcessively lean airfuel mixtureOpen or short in lead wires, or loose lead connectionsRepair, replace or connect properlyReplaceShorted, grounded or open generator coilReplaceShorted or punctured regulatorrectifierLead wires tend to get shorted, open-circuited, or Repair or tightenloosely connected at terminalGrounded or open-circuited stator coils or generatorReplaceDefective regulatorrectifierReplaceInternal short-circuit in the batteryReplace batteryDamaged or defective regulatorrectifierReplaceLead wire insulation frayed due to vibration, resulting in Repair or replaceintermittent shortingInternally shorted generatorReplaceDefective regulatorrectifierReplaceRecharge or replaceRun down batteryReplaceDefective switch contactBrushes do not seat properly on the commutator in the Repair or replacestarter motorReplaceDefective starter relayReplaceDefective neutral relayReplaceDefective emergency switch(E-17) ReplaceDefective engine stop switchReplaceDefective neutral switchReplaceDefective parking brake switchConnect, tighten or repairWiring connections loose or disconnectedSymptom and possible causes Defective ignition coilDefective spark plugDefective generatorDefective CDI unitDefective pickup coilExcessively rich airfuel mixtureExcessively high idling speedIncorrect gasolineDirty air cleaner elementIncorrect spark plug (cold type)Remedy