Yep, there is a circuit breaker on the generator where others are describing. Get familiar with it because there will be times when you are running too many 110V things off the generator and that circuit breaker will trip on you. Don't be shy. Remove the Onan cover, it's right there, easy to reset.
A word of caution. MAKE SURE to pay close attention when installing the Onan cover back on. Because you are working a bit by feel, a few people installed the cover incorrectly and later lost it on the road. The generator requires the cover for proper cooling, and a new cover is expensive.