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Thanks guys Have isolated the house battery ends with plywood. Will try the voltage idea. I do have the original owners manual, but doesn't seem to helpful Will look closer. thanks again for the info. cheers Rex

Thanks Herman I get all the lights and whistles running when I turn on the key but not starting. There is a separate start booster so I do not know if when starting it uses house power. Maybe the starter batteries aren't up to snuff, but they read near 13.8 Perhaps put new house batteries and see what happens. Cheers Rex

Hi there I have a 97 Patriot 330 hp. Will the engine start if the house batteries are not in the motorhome? Cheers Rex

Cheers Thank you very much

I have a 97 Beaver Patriot 330 hp. This may sound stupid but are the start batteries wired in parallel or series? Is the starter a 12 or 24 volt? . Cheers Rex