Engine Doesnt Turn Over, Engine Backfires | Polaris 550 EPS instruction

TROUBLESHOOTING

Engine Doesn't Turn Over

Possible Cause	Solution
Low battery voltage	Recharge the battery to 12.8 VDC
Loose battery connections	Check all connections and tighten
Loose solenoid connections	Check all connections and tighten

Engine Turns Over, Fails to Start

	Possible Cause	Solution
	Possible Cause	Solution
	Out of fuel	Refuel, cycle key to ON position three
		times for 5 seconds each, then start
	Clogged fuel filter	See your dealer
	Water is present in fuel	Drain the fuel system and refuel
	Old or non-recommended fuel	Replace with fresh recommended fuel
	Fouled or defective spark plug(s)	Inspect plugs and replace if neces-
		sary
	No spark to spark plug	Inspect plugs, verify stop switch is on
	Water or fuel in crankcase	Immediately see your POLARIS
		dealer
	Low battery voltage	Recharge the battery to 12.8 VDC
	Mechanical failure	See your dealer

Engine Backfires

Possible Cause	Solution
Weak spark from spark plug	Inspect, clean and/or replace spark
	plug(s)
Incorrect spark plug gap or heat	Set gap to specs or replace plugs
range
Old or non-recommended fuel	Replace with fresh recommended fuel
Incorrectly installed spark plug wires	See your dealer
Incorrect ignition timing	See your dealer
Mechanical failure	See your dealer
Loose ignition connections	Check all connections and tighten
Water present in fuel	Replace with fresh recommended fuel
Leaking exhaust components	See your dealer

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Polaris 550 EPS owner manual Engine Doesnt Turn Over, Engine Turns Over, Fails to Start, Engine Backfires

Contents

Sportsman X2 550 EPS Page Welcome Page Table of Contents Introduction European Vibration and Noise Vehicle Identification Numbers VIN Safety Safety Training Safe Riding Gear Helmet Eye Protection BootsEquipment Modifications Gloves Age Restrictions Safety WarningsOperating Without Instruction Failure to Inspect Before Operating Handling GasolineExposure to Exhaust Carrying a Passenger Using Alcohol or DrugsProtective Apparel Carrying More Than One Passenger Operating on Public Roads Carrying a Passenger Cargo BoxOperating on Pavement Operating at Excessive Speeds Jumps and Stunts Physical Control of the ATVTurning Improperly Crossing Hillsides Improper Hill ClimbingDescending Hills Improperly Stalling While Climbing a Hill Operating on Steep Hills Operating Improperly Reverse Operating on Slippery TerrainOperating in Unfamiliar Terrain Skidding or Sliding Improper Tire MaintenanceOperating Over Obstacles Operating Through Deep Water Improper Cargo Loading Operating on Frozen Bodies Water Poor Visibility Hot Exhaust Systems Operating a Damaged ATVPhysical Skills Unauthorized Use of the ATV Safety Labels and Locations General Warning Age 16 Warning Reverse Override Warning/AWD Caution Passenger Safety//Discretionary Warning Passenger Must Always Tire Pressure/Load Warning Hitch Capacity Label Rack Warning, FrontClutch Cover Warning Box Warning Mode/Reverse Override Switch Features and ControlsSwitches Engine Stop Switch Headlight Switch Main Key Switch4X4 Switch Throttle Lever Brake Lever Master Cylinder/Brake Fluid Parking Brake Locking the Parking Brake Auxiliary Foot Brake Brake Fluid Level Belt Life Electronic Power Steering EPSAutomatic Transmission Gear Selector Extreme Use 30 AH Battery Fuel Tank Cap All Wheel Drive System ADC 4X4 Mode4X4 Mode Engaging 2X4 ModeTurf Mode Disengaging Active Descent Control Active Descent Control ADC SystemEngaging Active Descent Control Passenger Seat Seat Conversion Backrest Adjustment Latch Passenger Front Box/Compartment Speedometer Instrument ClusterDigital/Analog Gauge Indicator Lamps Lamp Indicates Condition Rider Information Center Features and Controls Display Units Standard/Metric Odometer Mode Programmable Service Interval Engine Error Codes Diagnostic Display Code Definitions Sportsman X2 550 EPS Diagnostic Codes EPS Models Only Engine and Drivetrain Break-in OperationBreak-In Period PVT Break-in Clutches/Belt Pre-Ride Checklist Remarks Safe Operation Practices Know Your Riding Area/Tread Lightly Trail Etiquette Starting the Engine Cold Weather Operation Driving Procedures Turning the Vehicle Driving with a Passenger Operation Driving on Slippery Surfaces Driving Uphill Driving on a Sidehill Sidehilling Driving Downhill Turning Around on a Hill K-Turn Operation Driving Through Water Driving Over Obstacles Driving in Reverse Parking on an Incline Hauling Cargo Do not Travel Faster than the Recommended Speeds Never exceed 50 MPH 80 km/h while carrying a passenger Towing Loads Dumping Cargo Winch Safety Precautions Winch Guide Winch Guide Winch Guide Winch Operation YES no Winch Guide Winch Guide Winch Guide Winch Cable Care Shock Loading Winch Guide Winch Maintenance and Service Safety Emission Control Systems Severe Use Definition MaintenancePeriodic Maintenance Chart Maintenance Chart Key Symbol Description Miles Fuel system 100 H 12 M Procedure Lubrication Guide Engine Oil Oil Recommendations Oil Level Oil and Filter Change Oil Filter Transmission Oil Oil Check Oil Change Front Gearcase Demand Drive Fluid ADC Extreme Use Definition Fluid Check Fluid Change Active Descent Control ADC Fluid Fluid Level Position the vehicle on a level Rear Gearcase Oil Power Steering Unit Cooling System Recovery Bottle Coolant Radiator Coolant Auxiliary Foot Brake BrakesHand Brake Steering Assembly Toe Alignment Seat Removal Side Panel/Footwell Removal Front Wheel Hub Tightening TiresTire Tread Depth Wheel Removal Wheel Type Nut Type Nut Torque Wheel InstallationWheel Nut Torque Specifications Air Filter Fuse Replacement Headlight Lamp Replacement Lights High Beam Adjustment Low Beam Adjustment Headlight Housing Replacement Lower Headlamp Replacement Taillight/Brakelight Lamp Replacement Spark Plug Recommendations Plug Condition Torque SpecificationSpark Plugs Spark Plug Inspection Normal Spark Plug Wet Fouled Spark Plug Vehicle Immersion Spark Arrester PVT System 127 Condition Range to Use When To Use Low Range and High RangePVT Drying Battery Battery Removal Battery Installation Battery Storage Battery Charging State Voltage Action Charge Time Throttle Body/Idle RPM Throttle Cable Freeplay 135 Handlebars Camber and Caster Front and Rear Springs Accessories Transporting the ATV Washing Tips Cleaning and StorageWashing the Vehicle Polishing the Vehicle Polishing Tips Oil and Filter Clean the ExteriorStorage Tips Fluid Levels Air Filter / Air Box Battery StorageFog the Engine Inspect and Lubricate Troubleshooting Drive Belt Wear/Burn Engine Backfires Engine Doesnt Turn OverEngine Turns Over, Fails to Start Engine Pings or Knocks Engine Runs Irregularly, Stalls or Misfires Engine Stops or Loses Power Engine Overheating Polaris Products Part Number Description Specifications Sportsman X2 550 EPS Clutching N/R/P Warranty Limited Warranty Limitations of Warranties and Remedies Lubricants and Fluids 152 HOW to Obtain Warranty Service Exported Products A. EPA Emissions Limited Warranty 156 California Residents Maintenance LOG 159 Battery Index 161 162 163 9924657