Actually I do need to limit the demand on the generator. The problem is the charging systems on most boats will demand the maximum from the AC source. With my system, for example, the charger will demand 28 amps AC from the source if it thinks it is available. This is fine at the dock, but when running my Honda generator, I only get 16.67 amps AC out of the generator. If I leave the setting on 30 amps AC available, the charger will try to get 28 amps and the Honda generator will try to provide 28 amps, overloading the generator's output capacity. The generator's overload protection shuts off the AC output. The generator's motor keeps running, but with no AC output until you reset the breaker. I learned this one the hard way!
Hence the original question. If the engine on the Honda generator is running, but nothing is coming out, usually the Honda generator is in the overload state, and has to be reset. The only way to prevent an overload is to limit the demand on the generator.