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44 TROUBLESHOOTING Engine Backfires Engine Pings or Knocks Engine Runs Irregularly, Stalls, or Misfires POSSIBLE CAUSE SOLUTION Weak spark from spark plug Inspect, clean, and / or replace spark plug Incorrect spark plug gap or heat range Set gap to specification or replace plug Old or non-recommended fuel Drain the fuel system and refuel Incorrectly installed spark plug wires Take the generator to an authorized Polaris servicing Incorrect ignition timing Take the generator to an authorized Polaris servicing Mechanical failure Take the generator to an authorized Polaris servicing Loose ignition connections Check all connections and tighten Water present in fuel Drain the fuel system and refuel POSSIBLE CAUSE SOLUTION Poor quality or low octane fuel Replace with recommended fuel Incorrect ignition timing Take the generator to an authorized Polaris servicing Incorrect spark plug gap or heat range Set gap to specification or replace spark plug POSSIBLE CAUSE SOLUTION Fouled or defective spark plug Inspect, clean, and / or replace spark plug Worn or defective spark plug Take the generator to an authorized Polaris servicing Incorrect spark plug gap or heat range Set gap to specification or replace spark plug Loose ignition connections Check all connections and tighten Water present in fuel Drain the fuel system and refuel Kinked or plugged fuel tank vent line Inspect and replace Incorrect fuel Drain the fuel system and refuel SMART throttle control malfunction Take the generator to an authorized Polaris servicing Mechanical failure Take the generator to an authorized Polaris servicing |