Be prepared for a 25% loss of wattage potential of the gen set. Natural gas mixtures vary per region of the country. Having been forced to work with Worthington natural gas prime movers I have the opinion that the spark system must be maintained in top condition. Do not hesitate to reduce spark plug gap to .020" if that's what it takes to produce max power and easiest starting.Recommend changing lube oil every 1,000 hours of use as methane strips lube oil of high pressure shear additives. Watch engine temp as it's going to run hotter.
