2002-2009 Suzuki LT-F250 Ozark Engine Stalls

Suzuki LT-F250 Ozark Engine Stalls 2002 2003 2004 2005 2006 2007 2008 2009

2002-2009 Suzuki LT-F250 Ozark ATV engine stalls refers to when the all-terrine vehicle stops running, typically because of an overload on the four-wheeler’s engine. Stalling conditions often occur when the engine is warm, when putting the vehicle in or out of gear, or when accelerating. A stalling condition can also be accompanied with backfiring. Whatever the situation, here’s what you should check if your Ozark 250 engine stalls.

Engine Stalls Easily

Suzuki LT-F250 Ozark Engine Stalls 2002 2003 2004 2005 2006 2007 2008 2009

  • Valve clearance out of adjustment. It’s recommended to download the factory service manual to fix this. The manual contains complete step-by-step valve clearance adjustment procedures.
  • Fouled spark plug. Either clean the plug or replace it, whichever is necessary.
  • Defective generator. Replace the generator with a new part.
  • Faulty CDI unit. Replace the CDI unit with a new part.
  • Obstructed or defective fuel valve. Clean or replace the valve, whichever is necessary.
  • Clogged carburetor jet. Clean jet, refer to download repair manual for cleaning procedures.

Always refer to the download repair guide when performing maintenance or repairs to your Suzuki Ozark 250. The manual contains easy-to-follow repair instructions, diagrams, photos and advance troubleshooting information to ensure you complete the repair job successfully. It also covers everything discussed here in greater detail.


  1. My 2003 Ozark stalls and backfires at top speed. When I’m running it at wide-open throttle for more than 30 seconds it will start backfiring and stall. It takes me about 1 minute to get it started again.

    – The spark plug was black so I replaced it but it didn’t remedy the problem.
    – I turned the pilot screw about 1/2 clockwise to lean mixture. Again, it didn’t help solve the problem.
    – Should I make it richer instead?

    Any suggestions?
    Thank you!

    • Have you check he gasoline? Sounds like there could be some contaminated fuel issue. If gas is contaminated it might require you to clean the carb after you clean the tank and the lines. Also clean the fuel vent. Sounds like you played with the carb settings. After you resolve all the issues you might need to tune the carb again. I’d recommend downloading the factory service manual and refer to the carburetor tuning guide.

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