Husqvarna 96727750400 Operator's Manual

Engine will not startBlade switch is engagedSteering controls are not locked in theneutral positionPark brake is not activatedDead batteryContamination in the carburetor or fuel lineFuel supply shutoff valve is closed or in thewrong positionClogged fuel filter or fuel lineIgnition system faultyStarter does not turn the engine overDead batteryBattery terminal cable contacts are defectiveBlown fuseFault in the starter safety circuit. See SafetySystem in the Maintenance SectionEngine runs roughFaulty carburetorClogged fuel filter or jetChoke is activated with a warm engineClogged ventilation valve on the fuel capFuel tank nearly emptyFouled spark plugsRich fuel mixture or fuel-air mixture.Wrong fuel typeWater in fuelClogged air filterEngine seems weakClogged air filterFouled spark plugsCarburetor incorrectly adjustedAir trapped in hydraulic systemMachine vibratesBlades are looseBlades are incorrectly balancedEngine is looseEngine overheatsClogged air intake or cooling finsEngine overloadedPoor ventilation around engineDefective engine speed regulatorToo little or no oil in the engineContamination in the fuel lineFouled spark plugsBattery not chargingBattery terminal cable contacts are defectiveCharging lead is disconnectedFault in engine charging systemMower moves slowly, unevenly, or not at allPark brake activatedBypass linkage engagedTransmission drive belt is slack or offAir trapped in hydraulic systemMower deck not engagingDrive belt for the mower deck is looseElectromagnetic coupling contact is looseBlade switch is faulty or loose from cablecontactBlown fuseTransaxle leaks oilDamaged seals, housing, or gasketsAir trapped in hydraulic systemUneven mowing resultsUnequal air pressures in tiresBent bladesSuspension for the mower deck is unevenBlades are dullDriving speed too highGrass is too longGrass has collected under the mower deck31TROUBLESHOOTINGProblem / Cause