Holes in the boat!

[poter]

I have a new set of instruments (compliments of the LBS) & I am now looking at the fixings. As the new Speed log paddle wheel is a smaller hole than my existing, I will need to take out the old one fill the hole & drill a new one.
I am sure PBO must have done an article on this,
or failing that any help would be appreciated.

One problem - I want to do all the work in a day (is it possible?) as this will be the cheapest option for the boat lift, otherwise its going to cost a small fortune.

poter.



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[yoda]

Poter

How much smaller is the new fitting from the old? If within a few mm you may well get away with it as they have large flanges and nuts to accomodate these things. If the difference from the old hole is too big to do this, one tide day may not be enough. Alternatively a couple of plates with the correct size hole used to sandwich the hull with lots of suitable sealant may allow you to do the job in a day.

Yoda

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[chriscallender]

Cutting a new hole and putting the new transducer in during a day should be possible - although a bit of heat (so electricity?) and a good few hours will be needed for the sealant to be cured before it gets wet.

Filling the old hole in a day (assuming glassfibre) - no way I can see that can be done properly (or even at all?). Possible solutions to this dilema could be leave the old transducer in place but disconnected until you get a better opportunity - not ideal since you have an unnecessary hole.... but the old transducer never leaked so far I guess - or else fit a skin fitting in the old hole and try to find something useful to do with it - one idea I heard was to use it as a seawater inlet for cleaning dishes with seawater to save freshwater. For now you could just fit the skin fitting and seacock in preparation for doing this and put the tap in when afloat again, just remember to keep the seacock closed if no hose is fitted to it!!!

This is not the kind of work that I personally like to do under pressure of time, I like to allow that things could go wrong, I could have to go and buy a new hole cutter, fittings etc. Are you meaning do it in a day at the boatyard, or do you mean between tides? I would find doing it between tides a bit scary, I'm sure it can be done but I know that rushing is not something I handle well.

The technique for filling the old hole has been discussed on here before probably some time ago but if you do a search over all posts you should be able to find it eventually.


Good luck

Chris

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[Moose]

Why not leave the old transducer in there? At least you know it is sealed!

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[poter]

Thats a good idea!

Thats a good idea, re fitting a skin fitting and valve, then using the inlet for a sea water flush, but as you say it is another hole below the water line, & I have enough problems with water in the Bilges, at least its freshwater, but I do not want to add to my probs.

The idea was to get the boat craned out, not against a wall. as I would also be a bit concerned. How long does a fibre glass repair take to go off?

What about, say a big external washer (what material would the washer be?) drilled to the correct hole size for the new fitting and filling in behind it with epoxy?

How long curing time?

The hull is faily thick (Its a Moody!) & the area is easily accessable from the inside.

Does anyone know if PBO have done an article?

poter.

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[chriscallender]

Re: Thats a good idea!

Have a look at http://www.ybw.com/cgi-bin/forums/showthreaded.pl?Cat=&Board=pbo&Number=358993&page=&view=&sb=&o=&vc=1#Post358993.

Hope some of that helps.


Chris


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[Hardley]

Hi,
See my reply to the same question on 17/12/2003;
Under "LOG"
Hardley


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