1. Please check if you used correct oil and mixed them in correct ratio: Fuel:91# gasoline; Mixture ratio of fuel and oil is 20:1~25:1
     Use regular 2 stroke oil (easy to find in the supermarket) and 91+ octane fuel. Ratio mix should be 1 gal of fuel to 5.5 oz of 2 stroke oil. You can also use the mixing bottle provided with the unit to achieve proper mixture.
  2. Please make sure that the oil can flow into the oil filter.
  3. Please check if the fuel valve is open and the kill switch is off.
  4. Please check if the damper is on.