How to Adjust a Carburetor on a 16 HP Kohler

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The 16 horsepower single cylinder, Kohler engine is commonly found on outdoor power equipment, such as generators and lawn tractors. The carburetor is responsible for mixing the fuel and oxygen going into the engine cylinder. When the mixture becomes too rich or too lean, the carburetor needs adjustment. Knowledge of engine theory will be helpful in the procedure; adjustment of the carburetor will take 10 minutes to complete.

Things You'll Need

  • Tachometer
  • Flathead screwdriver

Set the engine on a hard, flat surface. Start the engine and advance the throttle to the "Medium" position, let run for five minutes to allow the engine to reach operating temperature.

Move the throttle to the "Slow" position. Turn on the tachometer and set to four-cycle engine. Wrap the lead from the tachometer around the spark plug wire.

Locate the carburetor on the right side of the engine directly under the air filter. On the side of the carburetor is a black limiter cap fitted on top of the idle screw.

Turn the limiter cap with the flathead screwdriver until the tachometer reads 1650 plus or minus 75 rpm. Turn the limiter cap clockwise to decrease the rpm and counterclockwise to increase the rpm.

References

  • Tech Manual: STX46
  • Ian Gutoskie, Service Manager; Central Florida Power Equipment; Kissimmee, Florida
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