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Old 04-22-2014, 04:12 PM   #1
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1991 25' Airstream 250
Oxford , Oxfordshire
Join Date: Jun 2007
Posts: 286
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High output alternator options

Hi all,

My alternator crapped out on Bank Holiday Sunday in deepest Devon. I'll need a new one. I recall advice that we should shoot for a high output version, but can anyone confirm that this looks reasonable for my 1990 250 Classic?

DB Electrical - ALTERNATOR HIGH OUTPUT 220 Amp 7.4L P VAN 89 90 91 92 93 & 6.2L Die

Many thanks

Think outside the box
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Old 04-22-2014, 04:14 PM   #2
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2002 30' Classic S/O
Garden Valley , Idaho
Join Date: Jul 2010
Posts: 1,254
DB Electrical is the best. I would call them and confirm the 220 will work with your existing wiring and fuses, that would be my only concern.


2008 F-250 4X4 Lariat V-10
2002 Airstream Classic 30' w/SO #2074
2007 Kubota 900 RTV
1996 Ford Bronco
2007 Lincoln LT
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Old 04-22-2014, 06:10 PM   #3
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1979 28' Airstream Excella 28
Commerce , Michigan
Join Date: Jun 2012
Posts: 30
I just wanted to pass along some experience about high output alternators in these old p30 chassis first off the 10si / 12si framed alternators can't she'd enough heat in the cramped doghouse at anything much above 100 amps and the stock wiring defenatly will not handle any output more than that anyways when I redid mine I went with 105amp low cut in alternator and I run 4 electric engine fans use the extra money to go led on the lighting and up the battery capasity. I did rework the charge line to 4G a . I changed all of my vehicle lighting as well as my boat trailer to led and I have had zero charging problems in 4 years now. I have 4 group 31 battery's on board and the bottom line to all this is much better boondocking capasity and good prep for solar for about the money just spent differently

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