[Public-List] Yamar 2cyl 15hp

[Mike Lehman]

At the seminar, the presenter had a 200 AMP alternator that he when charging 
at full rate used 13 HP (his boat, a 39 ft. Pearson, had a 34 HP Yanmar). He 
had a 3-position switch that he mounted on the engine panel that could be 
switched to off/full charge/half charge. His point was that you need the 
ability to 'manage' you electrical systems. He was very good and really 
understood electrical systems.

-----Original Message----- 
From: John Birch
Sent: Thursday, March 15, 2012 10:46 AM
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-List] Yamar 2cyl 15hp

If the batteries are low, the Alt output it high, ergo the load on the
engine is higher. Don't know how high but it is higher. When the bulk phase
has passed and it drops down to low output the load is considerably reduced.

You can hear the difference on some engines. Would never even think of
switch off the master switch though. Not worth the risk to the Alternator.

John

----- Original Message ----- 
From: "Jeffrey" <alberg30nh at gmail.com>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Thursday, March 15, 2012 10:05 AM
Subject: Re: [Public-List] Yamar 2cyl 15hp


>I don't understand how this could be? The alternator is spinning regardless
> of ignition state or current draw..and the resistance to spin the shaft is
> the same..I think.
>
> -jeff
>
>
> Jeff Fongemie
> #116 Seagrass
>
> http://picasaweb.google.com/fongemie
>
>
>
>
>
>
>
>
> On Thu, Mar 15, 2012 at 8:59 AM, Mike Lehman <sail_505 at hotmail.com> wrote:
>
>> I recently went to a seminar on marine electric systems and learned
>> something that was quite interesting...if you have a diesel and the 
>> engine
>> is in the process of charging the battery, it can take a significant 
>> amount
>> of HP to run the alternator, depending on the size of the alternator and
>> the state of charge on the batteries. But it you need the extra HP to go
>> through an inlet, or bridge, or fight some strong current, you can turn 
>> of
>> the ignition switch, which will turn off the tach and the alternator and
>> give you the extra power you may need. The engine will continue to run, 
>> but
>> you will not be charging your batteries. I have never tried this, and am 
>> a
>> bit scared to do so. Has anyone ever tried this?
>>
>> -----Original Message----- From: Joseph Balderson
>> Sent: Monday, March 12, 2012 10:01 PM
>> To: Public-List at lists.alberg30.org
>> Subject: [Public-List] Yamar 2cyl 15hp
>>
>>
>> Has anyone repowered  an A-30 with a Y2 15hp Yamar?
>> Baldy3
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>> --
>> Jeffrey Fongemie
>>
>>
>>
>>
>>
>>
>>
>>  <http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org>
>>
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