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AuthorMessage
jeremy1
jeremy1

Posted: Wed Aug 05, 2009 2:11pm

Post Subject: Locking diesel cap

I have seen many adverts for locking fuel caps to fit fillers that are flush with the decks and have an internal thread. Can anyone tell me where I can get a locking fuel cap that will fit an external thread as the neck of my filler protrudes above deck level. Jeremy Kerr

Tony-B
Tony-B

Posted: Wed Aug 05, 2009 7:16pm

Post Subject: Locking diesel cap

Dear Mr Kerr, I think any of the locking caps could be removed with a hooky bar and lump hammer so the idea is to persuade thieves that your boat is too hard to get at so they move else where. I do not remember hearing of any caps for raised deck fillers but the solution is simple for anyone who can drill holes & thread tap them. If you can not do it your boatyard probably can. Get a security screw, say MM. This will be a roundheaded machine screw (like a bolt with the thread all the way up) but instead of a slot in the head it has a star shaped hole with a pin in the middle. You also need a security bit or two to fit your screw. With the cap in place drill what is known as a tapping size hole right through the cap and filler pipe. Tap a (say 6mm) thread in the pipe and enlarge the hole in the cap to say 8 or 10mm. Screw the cap on and fit the security screw into the holes. This assumes you have a typical narrowboat raised filler made from bits of plumbers' fittings. If you have a thin brass filler and cap then change it for a flush one because it should not be welded in place. Tony Brooks

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