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  1. R

    Merc 3.7/470 voltage reg

    Always the option to have the stator rewound ( $140) for three phase delta, and increase output and go to three phase rect/reg on same mount pattern.
  2. R

    70 HP Mercury won't run with rectifier connected to battery

    If AC is coming thru on the output (DC) post, then yes, the rectifier is bad.
  3. R

    Merc 3.7/470 voltage reg

    Big starting battery. Big deep cycle accessories battery. Really the only way to go if you’re going to run a ton of load regardless. 40amps more than enough to reach ‘break even’. I’m $74 in pocket, and about two hours total of my time (r&r-de pot, sand to bare metal, drill four holes, coat...
  4. R

    Merc 3.7/470 voltage reg

    Yeah. Looked at that link. it’s $329. and my power steering is already using that groove. My experience says that the <60° Belt wrap that results WILL prove problematic at some point. Plus, I have seat base and doghouse corner occupying that space. Fuel tank in floor just in front of crank pulley.
  5. R

    Merc 3.7/470 voltage reg

    I used the stock reg/mount. Depotted the old circuit board and installed a modern MOSFET 39amp reg/rect. All in, far less than new OEM style. reg/rect. Still uses the water cooled heat sink. 13.2 VDC at idle. 14.3 VDC at full revs. no discernible heat. 9 hours run time since conversion.
  6. R

    Merc 3.7/470 voltage reg

    I know people are going to chime in and say “ just put an alternator kit on it”. the low mount doesn’t work for me-no room in front of crank pulley. Has power steering pump so high location is already occupied. I’ve been a powersports tech for more years than I care to admit. ( motorcycle...
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