[C320-list] 4 D Battery Replacement
Stephen Cox
scox at timmin.com
Sat Apr 19 16:57:21 PDT 2008
The Balmar Alternator Regulator Guide suggests you will struggle with a
single belt pulley on that size alternator. You would need to check its
width at the very least. Is it 1/2" or 3/8" and what is fitted on your
engine now?
Extract from Guide:
When replacing an alternator in the stock engine position,
you're really facing the issue of physical limitation on
the
belt and side load on the water circulation pump. We don't
drive more than a 75 amp high output Balmar marine alter-
nator on a single 3/8" undedicated belt, or a 100 amp on a
7/16"-1/2" undedicated belt. Even though the numbers
might not seem much higher than say a 55 amp stock auto-
motive type alternator, most people see a huge improve-
ment in performance between the two. That is because the
alternators are designed to perform two very different jobs:
the stock alternator is designed for handling light constant
loads (such as lights, fans, radios, etc.) and the high output
marine alternator is designed to charge banks of batteries.
To move up to our 150 amp alternator, a dual dedicated belt
is required.
Stephen Cox
Tegwen #1141
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
> crashley at gte.net
> Sent: Sunday, 20 April 2008 3:04 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] 4 D Battery Replacement
>
> Pete,
>
> The Balmar 120A 60 series alternator I got came with a single
> belt pulley. I haven't installed it yet but it looks like it
> should fit okay. It also looks there's an adjustment in the
> external voltage regulator to reduce the output current if
> the load is too great for the engine.
>
> Thanks,
> CRA
> Rosebud #882
>
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