Adjustable Voltage Regulator
This is the 8MR2069TA as it comes from the factory. On this boat I chose to remove the factory installed regulator and use a Balmar ARS-4 multi-stage regulator. In hind site I could have saved myself a lot of money by using the existing stock regulator.
On a later boat, our Catalina 310, I used the alternator, as show here, without an external regulator.
If you want to use an external regulator read on..
90 Amp Leece-Neville Alternator