I don't disagree re boat engines which have more highly complex cooling systems
as both the fresh and salt water systems require attendance far more frequently
than cars. The freshwater side is less problematic than the saltwater side but
there is no "best by" date to refresh or clean the myriad of pipes, tubes,
pumps, filters or liquids found on boats/yachts/ships cooling systems. The age
of the fresh water cooling liquid is basically a non issue, just like with cars.
Having said that I did 2 yacht deliveries recently, one a twin engine Cat
powered sport fisherman and the other a 55 foot sailboat powered by a single
Perkins (both diesel). Both had cooling issues, not coolant related. As with
our cars (and my Healey) it's the hardware causing the problem, not the liquid.
No argument with you, just my experience...
Regards,
Richard C
> On Nov 5, 2015, at 09:41, David Porter <frogeye@porterscustom.com> wrote:
>
> Richard,
> not to sound argumentative, but the seawater systems/heat exchangers or what
> ever name are vastly different systems, but the engines are still subject to
> the same conditions as our cars and preventative maintenance should be a
> higher priority in off shore capable boats. Those boats using fresh water
> systems are highly prone to coolant system issues too. Mostly due to
> different temps across the heads, but also lack of pump lubrication... IMHO
> dp
>
>> On 11/5/2015 8:05 AM, Richard Collins wrote:
>> I am running the same
>> 50/50 mix in my BN7 but am using distilled water in lieu of tap water. It
>> hasn't been drained in a number of years except to fix a leak in the
>> original still used radiator several years ago.
>> FYI my water cooled Porsches have coolant more than 5 years old and no
>> issue. I have captained large motor yachts and the multi gallonage coolant
>> in their engines are seldom drained.
>> So age is not the issue IMO
>>
>>
>> Regards,
>> Richard Of Ky
>> BN7 #440
>>
>
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