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Old 05-30-2020, 06:04 PM   #1
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Found this thing in the aft Genset area?

Hello,

While doing a routine inspection of the generator area on the aft deck access area (2006 Mainship 400) I found this little thing...Looks kinda important,

Maybe a fluid Bleed line cap or a drain cap?....

Any suggestions as to what it could be?

Thanks
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Old 05-30-2020, 06:49 PM   #2
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The last picture is kinda fuzzy. Is that a pipe plug screwed into a pipe coupling?

Ted
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Old 05-30-2020, 08:38 PM   #3
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Pencil zinc holder?
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Old 05-30-2020, 08:52 PM   #4
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Greetings,
Mr. j. Kinda hard to tell with the corrosion. Soak it overnight in table vinegar and take a couple more pictures. One end seems to be a F threaded fitting but I can't figure out what the smaller end is.
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Old 05-30-2020, 09:02 PM   #5
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more pics

more pics, i think you are correct, maybe an end of a pencil zinc?
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Old 05-30-2020, 09:29 PM   #6
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Looks like a grease nipple?
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Old 05-30-2020, 09:35 PM   #7
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Hard to tell, but the unthreaded end almost looks like a worn down anode.

In any case, this doesn't look like something that broke off recently based on the level of corrosion.

IMO, where I would start looking is on the raw water system on the generator. Specifically, I would start at the heat exchanger and look for the anode holder.

My theroy is that it might have been removed and was misplaced. A replacement was installed. And finally that one rolled out from where ever it was hiding.

Ted
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Old 06-02-2020, 08:22 PM   #8
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Looks like the fitting on the Generator HE for the pencil zinc with a tiny piece of zinc still in it.
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Old 06-02-2020, 09:30 PM   #9
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Quote:
Originally Posted by Dougcole View Post
Looks like the fitting on the Generator HE for the pencil zinc with a tiny piece of zinc still in it.
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Old 06-02-2020, 10:45 PM   #10
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Whatever it is keep it, it can have some value if you sell it as a fossil from the trawlaric era

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Old 06-03-2020, 07:07 AM   #11
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If it were a zinc cap wouldn't it have male threads on it to screw into the cooler or whatever it's protecting?
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Old 06-03-2020, 07:11 AM   #12
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How big is it? Maybe a photo with a tape measure in it by the item so we can get an idea of size.
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Old 06-03-2020, 07:30 AM   #13
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It is called a “daymn, dropped it into the bilge” thingie. It’s always nice to have a spare to install.
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Old 06-03-2020, 08:25 AM   #14
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Greetings,
Mr. (saint) tt. MY thoughts exactly. NO external threads. The "nub" at one end and internal threads at the other prompted me to suggest cleaning it up to see if the "nub" is integral with the fitting or a separate piece that has broken off something. Looks a bit like a bicycle valve cap (Schraeder style) although the internal threads seem, too small for that.


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Old 06-04-2020, 05:17 PM   #15
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These photos were just posted over on the DeFever FB page. On top (green) and bottom (brown) of the rudder shafts. It's been suggested that one is for the packing and the other is the upper bearing grease nipple. Does this look like what you have? Maybe check your rudders?
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Old 06-04-2020, 06:06 PM   #16
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ok, will do thanks....i was under the impression they were left over pencil zincs
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Old 06-04-2020, 06:48 PM   #17
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Greetings,
Messrs. m & j. BOTH zinc holders and grease nipples have external threads as far as I have ever seen. Only threads visible on our mystery object are internal threads. I would still suggest to Mr. j that he soak the do-dad in vinegar or an acid to remove the verdigris to potentially make identification easier. As mentioned, a know object (quarter/dime) shown beside the object will give a relative size.
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Old 06-04-2020, 07:09 PM   #18
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RT, I think the second set of photos posted may show a two-part piece. It could be that the fixed screw in base has been knocked off, and the external screwed in nipple with it.
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Old 06-05-2020, 09:47 AM   #19
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Here are some updated pics after some cleaning ...Click image for larger version

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Old 06-05-2020, 09:53 AM   #20
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Greetings,
Mr. j. Thanks so much for your efforts. I'm still at a loss as to what it may be although I feel fairly safe in saying it is NOT a "zinc" holder or a grease fitting. Hmmm...
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