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AskTheRebuilder => Alternator Questions => Topic started by: exeterjeep on November 02, 2014, 07:21:49 PM

Title: How do I identify which model of alternator I have?
Post by: exeterjeep on November 02, 2014, 07:21:49 PM
I have an elderly Willys jeep which had been converted to a 12v alternator prior to my ownership. Looking at pictures, I believe it is a "10si", and if that's the case, then how do I determine the amperage output?
I do know that there is a 30 amp fuse between the B+ terminal and the battery and it has never blown regardless of load and/or rpm. There are NO marks on the unit.

Any ideas?
Title: Re: How do I identify which model of alternator I have?
Post by: exeterjeep on November 07, 2014, 03:19:32 PM
I believe I've found the answer on O'Rileys auto parts.  Most early alternators are about 40 amps, then 63 amps based on application.  My 10si looks as if it's 63 amps--which is WAY more than I ever use.