Jim,
When I was looking around for information on a dual alternator setup, there were people that run them in parallel. Are you saying that this is a bad setup and it will damage something? I would prefer to leave both operational, but I can certainly unplug the regulator for the internal alternator to disable it.
Borrowing tools is for the weak.
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2000 Max IV, 25hp Kohler Command, 26" Titan Tru Power AT's
1996 Max IV, 18hp Briggs, 24" Serwas
1998 Max IV (project in waiting)
1995/1999 Max II, 16hp Briggs, 21" Rawhides
Hustler 950 (Project in waiting)