My 7 KW Generac is over 5 years old. Last Saturday I had a 9 hour and 35 minute power failure. The generator ran fine and used 4 gallons of propane in that time period. The average load on the generator was 1 KW. Other than standard maintenance the only repairs were a starter motor that failed one month after installation and a bellows that developed tears in the rubber about a year ago.
Thanks for the info. I had heard about the bellows problem, they are cheap and easy to install. I assume the starter motor was covered under warranty.