[Public-List] Yamar 2cyl 15hp

[John Birch]

Well, I guess the first lesson is don't put a 200 AMP Alt on a 13 HP Motor 
; )

----- Original Message ----- 
From: "Mike Lehman" <sail_505 at hotmail.com>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Thursday, March 15, 2012 11:14 AM
Subject: Re: [Public-List] Yamar 2cyl 15hp


> 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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>
>
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