Why is my Kingfisher FPHT26-4 engine not reaching full speed?
- Rross22Aug 13, 2025
If your Kingfisher Trimmer's engine doesn't reach maximum speed, it could be due to a few reasons. A soiled air filter can restrict airflow, so cleaning the air filter is recommended. Another possible cause is using the incorrect fuel or fuel mixture. If this is the case, stop the engine, empty the fuel tank, and refill it with the correct mixture of fuel to oil (40:1). In some instances, the carburetor setting may not be correct, requiring adjustment by a qualified person.