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Old 06-26-2016, 06:53 PM   #1
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How many batteries is a 1999 National Dolphin 5350 supposed to have?

Hi guys! It's me again lol. I'm having so many problems with everything on my recently "as is" purchase of my 1999 National Dolphin 5350. Main one is POWER. We were told but the wolf in sheep's clothing of a salesman, that our model takes 3 batteries. But under the stairs or anywhere for that matter, we can only find 2. One in the left nook and one in the right nook with a gap between. I highly suspect that the 3rd battery goes there because we keep havING to jumpstart the generator, which will not stay running! Starts real strong for all of maybe 5 seconds and then dies. Help! Anxiously waiting for some helpful advice boondocking with the power in a heat advisory! Thanks in advance guys!
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Old 06-26-2016, 09:07 PM   #2
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Sounds like the generator has a failing fuel pump or a clogged filter. Another possibility might be oil level is low.

Make sure the battery connections are clean, including cable to ground connection. Once the batteries are charged, take to an auto parts store and have the batteries load tested. If you have room and cables for a third battery, I'd add it to the house circuit to give more capacity for house functions.

Also you might measure the space for the batteries, perhaps a smaller, cheaper battery was installed. If you have the space, increase battery size and capacity.
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Old 06-27-2016, 12:32 AM   #3
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You should have a minimum of three batteries. One twelve volt chassis battery and two six volt coach batteries (golf cart). The six volt batteries should be connected in series to supply 12 volts to the coach and to start the generator. Sounds like the previous owner took something out.
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Old 06-28-2016, 01:27 AM   #4
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As kennersonf said you should have two 6V Golf Cart Batteries (GC-2) connected in series for the coach or as some call it the house, and one 12V battery for the chassis/engine starting. With the age of your Dolphin the generator starting problem could be a bad fuel hose from the fuel tank to the generator. To check if that is your problem you can get a length of fuel hose, connect it to the generator fuel line and put the end in a gas can. If the generator continues to run the old fuel line has cracks in it and the generator is running out of fuel. Be cautious working with and open container of gas.
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Old 06-28-2016, 01:42 AM   #5
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Generator will also shut down if the controls detect that no power is being generated which could be due to non use.
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Old 06-28-2016, 11:31 AM   #6
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Quote:
Originally Posted by kennersonf View Post
You should have a minimum of three batteries. One twelve volt chassis battery and two six volt coach batteries (golf cart). The six volt batteries should be connected in series to supply 12 volts to the coach and to start the generator. Sounds like the previous owner took something out.
Our 1998 Sea Breeze was the same way when we purchased it. A 12V chassis battery and someone had put in a cheap 12V deep cycle Walmart battery for the house. I replaced the single house battery with (2) 6V Duracell golf cart batteries wired in series from Batteries Plus.
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Old 06-29-2016, 02:27 PM   #7
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Smile

Did you get your generator problem fixed? I had the same issue with my 1997 Dolphin, run about 5 seconds and quit.. My problem turned out to be the oil pressure sensor on the generator. There are several videos on u-tube that explain how to test and replace this sensor. Hope you get it fixed
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Old 06-30-2016, 08:31 PM   #8
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Exactly what happened to my 2004 dolphin. They dropped the fuel tank, replaced the hose and it runs like a champ.
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