Zenoah AIR G26 Instruction Manual

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Zenoah AIR G26 Instruction Manual Manual pdf 11 page image

11Troubleshooting Guide for Gasoline Enginesa) The engine does not start.The crankshaftdoes not rotateSeizure, intrusion of a foreign substanceThe fuel has not been fed tothe carburetorThe fuel has been fed to thecarburetorThe Stop switch hasbeen turned offWiring is disconnectedDisassemble and repairDisassemble and cleanCleanLoosenedspark plugAbrasion or damage ofthe cylinder, piston, orpiston ringTighten furtherReplaceReadjustReplaceWet plug Remove the sparkplug and dry itThe carburetor hasnot been properlyadjustedThe fuel is notsuitableTurn onRepairThe spark plug does not spark The spark plug does sparkClogging inside thecarburetorClogging of the fuelpipingNo compression(normally 7 kg/cm299.5 psi or more)The crankshaftrotatesThe spark plug is defectiveThe ignition module is defectiveReplaceReplaceThe air gap is too large AdjustThe spark plug gap is too large AdjustCompression adequateb) The engine stops by itselfIt suddenly stops The crankshaft does not rotateor is abnormally heavyThe crankshaftrotatesOut of fuelNot out of fuelThe carburetor has not beeen properly adjustedSee a)See a)Put backRepairUse a standard plugTurn onUse clean fuelReplaceThe fuel is not fed to the carburetorWater is mixed in the fuel ReplaceReplaceRefuelReadjustIt slows down and stopsThe plug cap has come offWiring disconnectionSpark plug bridgeThe Stop switch hasbeen turned offAir suction from a carburetor joint or oil sealAbrasion of the piston ringRepairReplaceThe fuel is not suitableCleanClogging of the muffler or exhaust port due to carbonThe spark plug heat range is not properSee c)RepairOverheatingRepairThe Stop switch is defectiveSwitch wiring is disconnectedc) Lower power outputd) The engine does not stopOverheatingGenerally speaking, there are very few things that willkeep today’s modern engines from starting. Use goodquality “fresh” fuel and make sure that good plugs areinstalled. Should the engine fail to start after these itemsare verified, refer to the charts on the following page.