Good point. Assuming 10 minutes a week over 2.5 years brings it to 55 hours with load on it.Were those exercise hours or loaded hours.
Professionally installed standby generators are sized for worst case load scenario. During an outage I would be conserving power (minimal load) to conserve resources.
Perhaps the engine was not adequately loaded during this break-in period.
Just a thought.
She’s probably frugal with her energy usage anyway. So it probably wasn’t worked hard at all.
Mine gets a workout. Especially if we’re all home for a snow day. Wife does laundry on those days. Then it gets to run the well pump, washer and dryer plus everything else.