[C320-list] Alternator change

[Jeff Hare]

Hi,

The AmpTech 125se (Dual Foot) is what we use.  We upgraded the Belt, not the pulleys.  The stock belt is too short I think and light duty.  We only use Gates Green Stripe belts which you can get at some auto parts stores because it's a fairly high end belt and really strong.  Never had an issue with them on the stock engine pulleys.  We do replace the belt every other year and cycle the old one out as a spare because they're such an inexpensive part.

The MaxCharge handles it and hooks up to it just fine.  In fact, I don't recall needing to make any settings changes beyond setting it to AGM mode.  

It's actually not a super complicated project but if you over-think it, you could end up making it really complex and complexity and reliability aren't very good friends on a boat.

Our current wiring schematic for alternator / starting battery is pretty simple.  I'll find it and make it available.

-Jeff Hare 
#809

-----Original Message-----
From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of Scott Westwood
Sent: Monday, July 16, 2018 9:50 AM
To: Catalina List <c320-list at catalina320.com>
Subject: [C320-list] Alternator change

Well it is decided that we will end up with a new alternator, Regulator, Monitor, and AGM batteries. Going for it.
We have a Yanmar 3GM30F
First the Alternator (before I call Mfg):
1. If I go over 100 amp (Maybe Amptech??) will I need to change all the other pulleys?  I am not near the boat so I don't know the current belt size.  Can the other parts handle it?  Nothing else to change?
2. If you plan to have an external regulator MUST you have an alternator that is listed as "external regulated" or can/should you go ahead and have an alternator that is also internally regulated?  Not sure if it is one or the other but can't do both??

Second the Regulator:
1.  Is the Balmar MC 614 an option?  Any other models I can look at?  Can this model handle the above Alternator (maybe 100-125 amp Alt)?  There is a comment about this model about (15 amp field current)??

That's it for now, anyway.  Have to run. Thanks, Scott Westwood scottwestwood at bellsouth.net H (919)-362-8538    C (919)-618-7185