Ever try to start a car with a totally flat battery like after leaving the lights on overnight? Somewhat the same with the RV except you don't need to get out the jumper cables in lots of cases.
If you have even a really flat battery in the coach but can start the RV engine, the engine running operates a solenoid to connect coach and chassis batteries together and that means the engine alternator is also pumping power to both sets.
It may help to rev the engine a bit like you might have done on cars? When spinning faster it puts out a bit higher voltage and that will likely be enough to crank the generator.
One thing to know is if it ran out of gas, it may take a longer cranking to first get gas to the generator and then fire.
It's a good idea not to crank steady for more than a minute and then let the starter rest and cool before trying more. Just not doing it enough to get it too hot?
But when any doubt for any reason whether the generator will start, it is always better to have the engine running first as that gives the best power from all the systems without fear of running any battery down!
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!
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