Scheduled maintenance is a necessity for all standby generators. The Liquid Cooled Scheduled Maintenance kits offer all the hardware necessary to perform a complete maintenance on Generac liquid-cooled generators. Oil will need to be purchased separately based upon the recommendations listed. Maintenance is recommended at every 200 hours or 2 years. If running in a dusty environment, more frequent maintenance may be required. Further maintenance details can be found in the generator owner's manual.