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Old 09-03-2019, 10:01 PM   #1
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Diesel Deck Fills

Hello
I have a 1990 GB 42 that I just purchased from a man that hasnít used the boat in some time. Iím going through all the systems and have found that the deck fills for the fuel are frozen shut. Iíve tried everything from different lubricants to corrosion breakers. I even used heat. I then took some dry ice to them and got two of the three opened. I pulled the third out of the deck and would like to replace it with a like kind. Brass 2 1/2 hose fitting. Does anyone have an idea of where I can fins an original or like original deck fill like that?

All the help is appreciated.
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Old 09-03-2019, 11:23 PM   #2
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Welcome aboard. Donít know where you can get one but since you have it out of the boat have you tried heating it to see if it will break free?
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Old 09-04-2019, 01:23 AM   #3
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While it’s removed, soak in ”Kroil” for several days. It’ll come loose.
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Old 09-04-2019, 05:29 AM   #4
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Any chandlery that handles commercial boats and white boats should be able to obtain what you need , perhaps Fisheries?

As you have removed the fittings , replacing the fill hose might be a worthwhile task.

A simple trick to save effort later is to place a 1/2 or 3/4 inch pa , like starboard , under the tank fill.

Raise it might be a PIA if you stub your toe , but lots easier to live with than a leaking O ring letting water in the fuel tank in every tiny rain or deck wash.
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Old 09-04-2019, 09:25 AM   #5
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Unfortunately those cast bronze deck fills will be spendy. Spartan marine has similar for $170-a-pop. How much heat did you try? Now that they're off, try using a torch; gets the rusted bolts off of my car, and they can't be worse than that.
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Old 09-04-2019, 09:43 AM   #6
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Thank you for the tips. I heated the one that I pulled out with a torch and itís still stuck. I do Have it soaking now in lubricant. Iím grabbing some Kroil today and will soak it in that as well. Wish me luck.

Thank you agin for the help
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Old 09-04-2019, 10:36 AM   #7
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Welcome to the forum first off. If you can screw the outer ring down to something solid, other than the boat, use a hammer (impact) driver which will usually break most things free, assuming yours has a slot across the face.
https://www.harborfreight.com/6-bit-...ase-64812.html
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Old 09-04-2019, 10:57 AM   #8
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Heat with a torch, then put a crayon to the threads. The wax will get sucked into the threads and then you'll be able to unscrew it.
Any color will do
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Old 09-04-2019, 11:18 AM   #9
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Quote:
Originally Posted by jleonard View Post
Heat with a torch, then put a crayon to the threads. The wax will get sucked into the threads and then you'll be able to unscrew it.
Any color will do
never heard that one. Good tip Jay!
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Old 09-04-2019, 12:33 PM   #10
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Quote:
Originally Posted by jleonard View Post
Heat with a torch, then put a crayon to the threads. The wax will get sucked into the threads and then you'll be able to unscrew it.
Any color will do
Nice idea. I had never hear of it either. I guess that would make it childs work???
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Old 09-04-2019, 01:40 PM   #11
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I'm fond of 'blue violet' color
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Old 09-04-2019, 10:43 PM   #12
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Welcome. Try Longship Marine in Poulsbo, WA at (360) 779-2378. Ask for Aaron, he has a photographic memory or something close. Good folks too.

Good Luck
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Old 09-04-2019, 10:58 PM   #13
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Iíve heated it up, cooled it down, soaked in lubricant for 24 hours and hammered it and torqued it. No luck. Iím taking down tomorrow to then guy that tunes my props to see if he can fix it. Never seen anything this stuck before.

Thank you for all the tips. Great ideas
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Old 09-05-2019, 12:00 AM   #14
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Amazing that it is still stuck. Did you try the crayon trick?
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Old 09-05-2019, 01:42 AM   #15
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Why repeat the problem with brass replacements? Stainless-steel fittings are an alternative.
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Old 09-05-2019, 01:46 AM   #16
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I agree with the stainless steel, I would replace the one that is out now with s/s and do the others as needed.
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Old 09-05-2019, 05:20 AM   #17
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I've got a 50/50 mix of Acetone and transmission fluid in a small oil can for such occasions. If you need it only once or twice a year, mix it as you need it. All bets off if cross threaded.
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Old 09-05-2019, 06:49 AM   #18
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Actually white vinegar soaking works best, even better if vinegar is hot.
Vinegar dissolves corrosion. Totally submerge the part.
Vinegar will easily enter the small spaces, but since you greased it up, you have to soak it in gas and and clean it good with soap now, if you want to try it.

After a few days soaking in vinegar it should easily open if the threads are not deformed.
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Old 09-05-2019, 08:26 AM   #19
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A key tip for penetrating oils is to tap on the materials. The idea being the oil gets to a point and then tapping helps break just enough of the corrosion to let it get a little further. Making sure that the item is set up to allow gravity to help the oil to flow downward.
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Old 09-05-2019, 08:58 AM   #20
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Iím trying to soak it in vinegar now for a couple days. Iím not against replacing it but i would like to keep the boat as close to original as possible. For now Iím going to keep down this path and try to get this thing unstuck.
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