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Mon, 11 Apr 2016 7:20 am BST- Light Rain
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The Norfolk Broads Forum / Broads Boat Owners Q & A / Winter Cruising
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Posted By Discussion Topic: Winter Cruising

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coling
Nov-11-2010 @ 8:26 PM                           Permalink
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We have an Aquafibre 33 with a Perkins 4.108 diesel. The intention is to keep her in commission over the winter so some cold weather cruising can be enjoyed. My concern, of course, is freezing.

Others I know cruise all year round but how do I protect the boat? Antifreeze in the cooling system is an obvious requirement and I have done this. In addition, I guess water tanks need to be emptied after each cruise? But what about the raw cooling system that pumps water in from the river - does this need protection and if so how? Is there anything else?

All tips will be gratefully received. In closing, however, I should mention there is no electricity at our mooring so tube heaters are a non starter.

Many thanks



Regards
Colin

Take my advice - there is nothing so nice as messing about on the river.

Strowager
Nov-11-2010 @ 8:39 PM                           Permalink
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Yes, the raw cooling system does need to be protected with anti-freeze if there's no heating, or the heat exchanger and raw pump housing could be damaged.

Some people close the seacock and poor a bucket ful of antifreeze slowly into the "vetus" type strainer if they have one, or disconnect the hose from the inlet cock, (after closing it) and dip that into a bucket of AF to draw it into the system.  Bio safe anti freeze only should be used, as it will be ejected when the engine is next started, and ordinary AF is very harmful to fish and aquatic life.

Some people fit a tee piece and another valve to a short spur to the inlet pipe, so that they can draw AF in without having to loosen any hoses.

I use my boat throughout the winter, but only for day trips, so I used to drain the domestic water and just use a 2 gallon jerrican with tap for tea making and washing up in the winter.

(I say "used to", beacuse I now do use a tube heater) Smile




This message was edited by Strowager on Nov-11-10 @ 7:42 PM

coling
Nov-11-2010 @ 8:52 PM                           Permalink
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Thanks for that. If the raw water inlet is turned off will not running the engine for a short (very) while have the effect of pumpimg all the water out of the raw system?

Regards
Colin

Take my advice - there is nothing so nice as messing about on the river.

This message was edited by coling on Nov-11-10 @ 7:54 PM

littlesprite
Nov-11-2010 @ 9:06 PM                           Permalink
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Don't go there.

If you got away with running it dry you then have to refill without air locks.
Just use the antifreeze in the filter option it's the best way.

martin

how can such a sleepy paradise create such passion.

Strowager
Nov-11-2010 @ 9:18 PM                           Permalink
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No, apart from the danger of damaging the rubber impeller by running dry, the pump would then be trying to push the water through the engine by air pressure, instead of more water, so the pressure needed to expel all of the water wouldn't be there.

As well as that, most cooling systems have quite a few low points, so water would still puddle in there and freeze (even more readily).

Most raw water cooled engines have strategically placed drain plugs, on the engine block, exhaust manifolds etc. so they can be drained down, (a good job too, because otherwise the engine block could crack).

Even with those, some people advise putting anti freeze first, so that any trapped pockets of water won't freeze.


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