65 amp alternator

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  #1  
Old 12-22-16, 12:11 PM
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65 amp alternator

My son has a 1990 Bronco II. The 75 amp alternator that was in it died, the replacement [same part #] had the wrong pulley on it and as it turned out the old pulley wouldn't fit the new alternator. The parts store finally found an alternator that was an exact match except for it's only 65 amps. Is there much of an issue downgrading by 10 amps? It does seem to be running/charging ok.
 
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Old 12-22-16, 01:04 PM
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You should be fine, wouldn't give it a second thought myself.
 
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Old 12-22-16, 07:16 PM
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just dont plan on him using a huge sound system or excess of off road lights. and the rating of amps have been modified from earlier years. they went from using the max output for short time, to using the highest it can maintain for a length of time. so really any newer alt will work fine. but i will add the quality just dont make it any more. always get a life time warranty.
 
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Old 12-23-16, 03:10 AM
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As Ice said, extraneous loads can affect the alternator. Like a winch
 
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Old 12-23-16, 03:14 AM
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The new alternator does have a lifetime warranty The old one's warranty did too, the salesman claimed it was one of theirs but it was purchased by the previous owner and my son has had the vehicle for 12 yrs.

I don't think he has anything but the stock radio but he does have a row of off road lights on the roof rack, ..... but it has been yrs since he's been off roading so I doubt they ever get turned on these days. No winch currently installed.
 
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