Alternator Question 200tdi

[markhollahan]

I have a 85 Defender 110 with a 200tdi. My alt is not keeping up with the demands of electrical sys and is not charging the battery at present.
I have the standard 65 amp alternator. I am pursuing 2 options,
rebuild the existing alternator - new brushes, etc should give it a new lease on life. OR

Replace with new one. Here is where the expertise of the masses is desired.

If I replace, should I keep to original 65 amp or can I move up to a 100 amp with little other modification. As an 85, there is no "complex electronics" so the question reallly is, can I (should I) and does the 100amp have the same bolt on as the 65 amp.

I am geographically separated from my truck, but am making plans to take care of this problem as soon as I redeploy.


Appreciate any insights, experience, advice.

sf
Mark

US Marine
1985 Defender 100 ROW, 200 tdi
2004 BMW R1150 GS Adventure