The keel bolts on our 1987 Moody 376 look pretty awful (rusted) and we have some questions before we go any further:
How are they put in the keel - threaded or welded?
What are they made of - stainless or regular steel?
Has anyone replaced them? How hard a job is it?
Thanks for any insight -
Jon Eld/Kathy Vreeland
Moody 376 PeKaBo
I read with interest the last America's Chapter thread regarding rusty keel bolts and something I learnt whilst at college studying for my apprenticeship came to mind.
We would all like to see polished nuts and bolts in our bilges, but, more often than not, it is what you can't see that is more important, ie below the surface and out of sight. I learnt that stainless steel could deteriorate when it is not open to the air and that, if a stainless steel nut is overtightened on a stainless steel bolt, the threads can welding themselves together, therefore making it more difficult to release at a later date. I believe that a further characteristic is that stainless steel does not contain the same elasticity as steel.
I did not decide that steel keel bolts were to be used on the Moody range but am sure that proper consideration was given to the correct material to be used at the time. It is possible that the pressure on manufacturers to fit stainless steel keel bolts was due to market forces and it is also possible that the qualities of stainless steel have improved since my college days.
The owner enquiring about rusty keel bolts should be aware that their inspection and withdrawal is well overdue as they appear to be 25 years old. I repeat, it is what you can't see that is more important and the withdrawal of a keel bolts for inspection should be carried out at regular intervals. I for one, would obtain a metal expert's opinion on the pros and cons of stainless steel over ordinary steel before deciding how to proceed.
It is, of course, necessary to look after and regularly maintain the rusting of the keel bolt nuts in the bilges. These should be wire-brushed and painted regularly as part of routine general maintenance. The material used for this is probably best obtained from a specialist paint manufacturer.
I hope that the above is of help to you.
Kindest
David
I should also mention that any MOA member can go to the MOA website and access the InfoExchange page from which you can post a question to Moody owners all over the world. There is also an archive of all past questions and all the responses. It is a treasure trove of information and also a treasure trove of knowledge that you can tap into. Here is the website http://www.moa.myzen.co.uk/cgi-bin/discus/discus.cgi There is also a Technical Library that has a vast amount of information available http://www.moodyowners.net/Technical_Library/library.shtml