Question about Watts Onan Portable Generator - 4000 , Model# 5500
Do you have a volt meter so that you can check battery output when unit is running. The charge rate on most small engines is about 3 amp so it will not charge very fast. If you have a battery charger I would disconnect negative cable from battery, check voltage on battery then hook up charger for a couple hours. Recheck voltage.Then leave battery neg. cable off overnight and check voltage again the next day.You may have a bad battery that wont hold charge. If it holds charge overnight then I would hook neg. cable back up and leave set for a day or two and recheck voltage. If voltage has dropped then you have something draining battery. Before I did anything to drastic I would clean all connections to battery and starter switch. If your system is really not charging you will have to replace starting diode. Good luck.
Posted on Nov 12, 2010
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Posted on Jan 02, 2017
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