Polaris Scrambler 50 - Manual (Page 177)

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Troubleshooting
Engine Runs Irregularly, Stalls or Misfires
Possible Weak Spark Cause Solution
Fouled or defective spark plugs Inspect, clean and/or replace spark plugs
Worn or defective spark plug wires See your Polaris dealer
Incorrect spark plug gap or heat range Set gap to specs or replace plugs
Loose ignition connections Check all connections and tighten
Water present in fuel Replace with new fuel
Low battery voltage Recharge battery with .5 amp charger
Kinked or plugged fuel vent line Inspect and replace
Incorrect fuel Replace with recommended fuel
Clogged air filter Inspect and clean or replace
Electronic throttle control malfunction See your Polaris dealer
Other mechanical failure See your Polaris dealer