Sounds like you are getting overly complicated.
Why bother taking the belt off?  .Murphy's law says  if you have an engine
failure it wil lbe the one with the disconnected belt.

If you have a properly  installed alternator and  your system is balanced,
it should run for several years  with liteel attention needed.

But if you have installed an oversize alternator  and still drive the water
pump with the same belt; of course you wil lhave trouble.
I always recommend that  you leave the OEM alternator in place for charging
the start battery  independently.

The new high output alternator is wired seperately to your house bank.  A
double shive pulley is made up that bolts to the front crankshaft pulley. In
most cases thes pulleys are already drilled and tapped for a PTO. Yanmar and
Kubota blocks are universal utlity  ingines used in thousands of
applications.  They are intended for power take of at both ends of the crank
shaft.  sometimes you can even buy  th eright pulley from an industrial
engine supplier. It isn't rocket science.
You can (unload) disable any alternator with an external regulator simply by
disconnecting the field circuit. That immediately  reduces the loading on
belt and to a lesser extent the bearings. Sealed bearings in the alterantor
wil last a long time. Many years for most boat applications.If you are not
using the water pump belt to also drive the alternator, yo udon't have any
problems to deal with.

regards
Arild


  -----Original Message-----
  From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Philip R. McGovern
  Sent: Tuesday, June 03, 2008 12:02 PM
  To: [email protected]
  Subject: Re: [Liveaboard] Fanbelt dust


  Arild:

  Thanks for the good advice.  I should have thought of checking Balmar's
website myself.  Duh!!!  As soon as I get back to the boat, I'll find out
what sort of regulator I have and go from there.

  Since we nearly always run both engines, it also occurred to me to just
disconnect one of the alternators by just taking it off the belt (and
replacing the belt with one having a smaller diameter, of course).  To even
out the wear on the alternators, I could alternate this setup from one
engine to the other every year or so.  Any thoughts?  Thanks again.

  Phil McGovern
  s/v Sunshine



  On Mon, Jun 2, 2008 at 11:02 PM, Arild Jensen <[EMAIL PROTECTED]> wrote:


      -----Original Message-----
      From: Philip R. McGovern


      How did you reduce the amp output of your Balmar?  Is it a setting on
the alternator itself or something else?  I am running two Balmar 100 amp
alternators and I hardly ever need all of their output.  I'd rather save the
fuel (or increase the RPM;s) if there's an easy way to back them off a
little.

      REPLY
      Its done with the amp manager adjustment on the regulator.  The exact
process is described in the documantation included with the regulator.
      If yo uhave lost o rmisplaced the installation / instruction manual
its availabel for download  from www.balmar.net

      Arild

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