10,000 hours on a 15 year old generator seems like a lot. That's like 13 hours per week all year. Assuming that the genny doesn't get run 2 hours a day every day of the year, that's some pretty heavy use. For comparison, I use mine lightly and in 23 years the Hobbs says 161.
OTOH, 10,000 a year on the Cummins seems about right for a coach that heads south every year.
Jerry & Jeanne
1996 Safari Sahara 3530 - 'White Tiger'
CAT 3126/Allison 6 speed/Magnum Chassis
2014 Equinox AWD / Blue Ox