An underspeed alarm will show when the engine is not able to come up to its full speed of 3600 RPM. There can be many causes for this, including, but not limited to, low fuel pressure or bad spark. We would recommend first contacting your gas line installer to ensure that the fuel pressure is proper. If the fuel supplied to the unit is adequate, then we would recommend contacting your local certified service technician. To locate a certified service technician in your area, search your postal code here: http://www.generac.com/Service/Deal...
. We recommend contacting your gas line installer first, as ensuring correct fuel pressure is the first step in the troubleshooting process, and if applicable, would fall under improper installation under the warranty statement.
answered 3 years, 11 months ago