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  #21  
Old 09-07-2010, 04:37 PM
jmmcalpin jmmcalpin is offline
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ah, got it.. I was thinking of doing that test over the weekend and was smart enough not to.. I have heard it can damage things like regulators and ECMs.. so I will definitely not pull the positive terminal while running..
Thanks , I am going to try moving the lugs on the isolator today and will let you know how it goes,
John
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  #22  
Old 09-07-2010, 09:52 PM
jmmcalpin jmmcalpin is offline
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I went to the boat today and took the wire that comes from the alternator to the battery isolator and I moved it to the battery 1 and then batter 2 post on the battery isolator. I only got 12 volts even with the engine running at 2k rpm. I think that means I need a new alternator.. Any other ideas before I order the alternator?
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  #23  
Old 09-07-2010, 10:53 PM
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JimN JimN is offline
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Quote:
Originally Posted by jmmcalpin View Post
I went to the boat today and took the wire that comes from the alternator to the battery isolator and I moved it to the battery 1 and then batter 2 post on the battery isolator. I only got 12 volts even with the engine running at 2k rpm. I think that means I need a new alternator.. Any other ideas before I order the alternator?
I would take the alternator and isolator to a NAPA or other shop that can test it. If it's bad, I would have it rebuilt to the maximum output for that case, which is 105A, IIRC. If you do upgrade it, you'll need to increase the gauge of the charging lead but it's usually well worth doing.
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  #24  
Old 09-07-2010, 11:05 PM
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Wired_Right Wired_Right is offline
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Originally Posted by JimN View Post
I would take the alternator and isolator to a NAPA or other shop that can test it. If it's bad, I would have it rebuilt to the maximum output for that case, which is 105A, IIRC. If you do upgrade it, you'll need to increase the gauge of the charging lead but it's usually well worth doing.
I second that !!!!!
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  #25  
Old 09-07-2010, 11:21 PM
jmmcalpin jmmcalpin is offline
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Thanks I will do that... John
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  #26  
Old 09-08-2010, 07:45 AM
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And let us know where you get it rebuilt...Im thinking on doing the same but would like a decent shop to send it to
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  #27  
Old 09-11-2010, 12:17 PM
jmmcalpin jmmcalpin is offline
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Ok, so I took them to the Napa store and it was a bad alternator, the new one was $174 so I bought a new one instead of rebuilding it. This also got me back on the boat yesterday and went star gazing till 1am, saw a few great shooting stars.. I also put new battery terminals on since the old ones were cracked and I couldn't get them really tight...The voltage read 13.6 at idle and 14.4 running so I think I am all set. Going back out today and take a ride on the air chair, that should charge up the batteries... Thanks for all the help. John
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