[Public-List] High Temperature

[George Dinwiddie]

Usually, the A4 uses a 140 thermostat in salt water and (I think) 160 in 
fresh.  The engine runs better at higher temp, but when you get above 
160, the sulfates start plating out inside the engine.  That's the black 
coating you sometime see in the water passages.  It's a thermal 
insulator, and requires boiling out in acid in extreme cases.  Some 
people run hot vinegar through on a yearly basis to reduce the buildup.

  - George

On 8/30/10 10:11 PM, Lawrence Morris wrote:
> All tstat I have experience with are in the 160 range.
>
> I have a A4 and it run on 160 just fine. I don't think the human touch
> is the proper Measurement.
>
> Larry Morris
> Bosun Yacht Systems
>
> Sent from my iPhone
>
> On Aug 30, 2010, at 9:02, "John Birch" <Sunstone at cogeco.ca> wrote:
>
>> Is not a 160 degree thermostat a fairly hot thermostat?!
>>
>> Nothing wrong with that, it will help prevent valve sticking, but it
>> is only 60 degrees short of the ambient boiling point.
>>
>> If you put your hand in 160 degree water it would produce an evil
>> burn. So would not the block be very hot to the touch. Many
>> thermostats are closer to 130, making for a cooler block, but risking
>> valve sticking.
>>
>> If everything is running properly, where's the problem ?
>>
>> Just a thought
>>
>> Best
>>
>> John
>>
>>
>> ----- Original Message ----- From: "Rogers, Jim" <JRogers at scelectric.ca>
>> To: "Alberg 30 Public List -- open to all"
>> <public-list at lists.alberg30.org>
>> Sent: Monday, August 30, 2010 7:16 AM
>> Subject: Re: [Public-List] High Temperature
>>
>>
>>> The pump was rebuilt by Van Ness Engineering, but you never know.
>>> Thanks for the suggestion.
>>>
>>> -----Original Message-----
>>> From: public-list-bounces at lists.alberg30.org
>>> [mailto:public-list-bounces at lists.alberg30.org] On Behalf Of
>>> crufone at comcast.net
>>> Sent: August 27, 2010 3:56 PM
>>> To: Alberg 30 Public List -- open to all
>>> Subject: Re: [Public-List] High Temperature
>>>
>>> Jim,
>>> Did you rebuild the water pump yourself? If not check to see if the
>>> proper impeller was installed and also installed properly,i.e., to
>>> turn the correct direction. If this problem just occurred and was not
>>> present prior to rebuilding the pump or replacing the Thermostat I
>>> would check those two items first. My normal course for diagnosis is
>>> to revisit what was changed most recently. Just because the pump was
>>> rebuilt doesn't mean it was done properly or carefully. Brian Zinzer
>>> just worked on his pump on #134 s
>>> o perhaps he can give you some pointers. I don't know, could they
>>> have reversed the hoses when they were put back on the pump?
>>> Michael #133
>>> ----- Original Message -----
>>> From: Jim Rogers <JRogers at scelectric.ca>
>>> To: public-list at lists.alberg30.org
>>> Sent: Wed, 25 Aug 2010 18:56:02 -0000 (UTC)
>>> Subject: [Public-List] High Temperature
>>>
>>> Has anyone else experienced this?
>>>
>>> We have a 1965 Alberg 30 with a Graymarine engine.
>>> The Sherwood water pump was recently rebuilt.
>>> The faceplate on the pump, the end opposite the sheave, is hot to the
>>> touch.
>>> The water exiting from the exhaust appears to have some steam in it
>>> or maybe just hot water.
>>> The thermostat was recently replaced with a new 160 degree thermostat.
>>> The engine block is also hot to the touch.
>>>
>>> The engine runs very well and smoothly, there is lots of water coming
>>> out of the exhaust.
>>>
>>> Any help would be greatly appreciated.
>>>
>>> Jim Rogers
>>>
>>> XANADU II #90
>>>
>>>
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>>
>>
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> _______________________________________________
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> Please support them.
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-- 
  ----------------------------------------------------------------------
   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.                          also see:
                'The Middle' by Ogden Nash     http://idiacomputing.com
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