Oops .. nearly sank

jimi

jimi

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Went to clean the log impeller yesterday. Unscrewed it and yanked it out, there's a valve thing on the access tube to stop water coming through ... unfortunately it was the depth thingie I yanked out which has no such system!! Amazing the amount of water that can flow out in a few seconds! I shall certainly be attaching bungs to my seacocks as my next job!

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There is a slowing-down-of-water-type-thingy on our log doobry, however i still seem to get a gobfull of seawater, only in a narrow, pressurised stream! Clever those blokes those chaps at raymarine eh?

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and Simrad Stowe stuff. Caught myself, just in time, unscrewing the slowing-down-valve bit, rather than the impeller bit....

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I have a blank plug, the same size as the log to stick in the hole as soon as the log is withdrawn. You still get a rapid influx of water, but it is only about 2-3 pumps on the bilge pump rather than gallons. The wooden bung is great if you dont care about being able to put the log back in, or you can hold the bung in place with one hand whilst de-weeding the impellor with the other (in which case you are definetily much more gymnastic than I am). The spare blank was supplied with the log (and the echo sounder) from silva.

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Ken

What are they talking about?

I only get a couple of drips in the cockpit when I retrieve the log over the stern rail

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The trick with the Raymarine ones, in case is not known, is to pull the log out very quickly - the big flow is while the log is partly withdrawn. Pulling it quickly is, however, emotionally challenging I find.

Similarly when putting it or the blanking plug in, once inserting it push it down quick. Obviously while there is nothing in the hole there is still considerable leakage so one has to put a hand over it or whatever, but there is no great rush of water.

I find I can do them, as long as I am emotionally prepared, with about a cupful of water getting in.

John

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I fitted a new Raymarine log about 3 years ago, had to buy the complete kit as the new didn't fit the old.... When examined, I thought this is good - it has internal 'flaps' to stop loads of water. When I had to clean the log later in the season, I removed it, screwed on the cap, cleaned it and replaced it with only a small amount of water to mop up. Great!
Until the next day, I thought the boat was a bit sluggish and appeared to be down by the head............ investigated and found the complete under forward bunk area full of water! I hadn't refitted the log corectly and it slowly leaked. I'm glad the builder had made the compartment waterproof - wether intentionally or not I don't know.
There was only a very small 'nib' for location before screwing the collar down and the 'O' ring had barely entered the bore for sealing - not a good design feature.

<hr width=100% size=1>dickh
I'd rather be sailing... :-) /forums/images/icons/smile.gif
 
Me too .. point I was really making was the extent of the ingress of the water. If a seacock failed I'd want to sort it asap without searching for bungs, I currently keep mine handy,up high but I think I'll also attach suitably sized ones to each of the seacocks.

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yes agree, and intend doing the same myself. IIRC this is a recomendation of the RNLI safety check - must have one of them.

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Nearly all log kits

Virtually all log kits have a blanking cap.

A good way to have at hand all time ..... drill suitable hole through centre, put bolt with 2 nuts and washers through, tighten the nuts so that the bolt head is proud with free area of thread. Of course you have remembered to place a 'ring' electircal connector on the bolt before fitting to the cap. This ring is now free to rotate around the secured bolt. Crimp a light line such as fishing line or small gauge stainless wire ..... such as fishing trace. Make this fast at a suitable point near so that you can always have the cap there and able to screw onto tube.


<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !
 
...nice old trad stuff too - saw the engine water intake on Edith for the first time and thought Oh what a good idea that brass pipe sticking straight up to above the waterline so you can unscrew the plug nut in the top and stick a broomstick down to clear the seaweed.

Never assume, always measure... Luckily I didn't lose the nut after it hit me on the nose.

<hr width=100% size=1>LowTech
 
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