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post #21 of 31 Old 12-10-2009
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If you ever sell this boat, remove the tank and keep it. Nothing beats MONEL for fuel tanks. Of course you'd need a second mortgage these days to buy a MONEL fuel tank.
Hey Rich,

I know you too have a T-37. I had a survey done about 2 years ago and the surveyor said that my fuel tank was Monel. Had you ever heard of a Tayana having Monel? My hull # is 448(built in '85) and I did hire a person there in Taiwan to oversee the production back in '85. He was a solo sailor who lost his sailboat in the South China Sea and needed work. I think his background was aero engineering and with both of us having engineering backgrounds, we communicated quite well, but at no point in time was there a discussion about changing the material of the fuel tank to Monel. The specs on the boat calls for "black iron".

Dee
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post #22 of 31 Old 12-10-2009
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I thought that everyone knew this trick;
1. Rinse tank with mineral spirits
2. Add a 3 lb bag of ice cubes from your local store
3. Add hand-cleaner/degreaser
4. Shake vigorously (as much as possible)
5. Drain any liquid and crud
6. Rinse with water
7. Let dry

- Ed


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post #23 of 31 Old 12-10-2009 Thread Starter
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Quote:
Originally Posted by eherlihy View Post
I thought that everyone knew this trick;
1. Rinse tank with mineral spirits
2. Add a 3 lb bag of ice cubes from your local store
3. Add hand-cleaner/degreaser
4. Shake vigorously (as much as possible)
5. Drain any liquid and crud
6. Rinse with water
7. Let dry

- Ed

That sounds like a pretty good plan. After I get the thing cleaned out, I can pressure test to see if it leaks. Probably not an issue putting about 5 psi on it and using a soap solution on all the joints. I am also looking to see what a replacement tank costs. Lots of good ideas here. Thanks
DD

Doug
Jboat J/37c (new to me Jan 2011); J/22 #1003


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post #24 of 31 Old 12-10-2009
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Toilet brush and some elbow length PVC gloves are what I used. I think I may have used dish soap as well, can't remember. After I was done with that I polished it with paper towels. No chemical is going to clean the tank as well as you can with good old elbow grease.

The only "trick" I did was fill the tank with water and add biobor jf to the water to make a very strong solution. I let that sit for a day or so. I figured that would sterilize what was already clean.

Now I'm still on the same filter as I was 2 years ago.

MedSailor

I have a sauna on my boat, therefore I win.
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post #25 of 31 Old 12-11-2009
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Quote:
Originally Posted by lancelot9898 View Post
Hey Rich,

I know you too have a T-37. I had a survey done about 2 years ago and the surveyor said that my fuel tank was Monel. Had you ever heard of a Tayana having Monel? My hull # is 448(built in '85) and I did hire a person there in Taiwan to oversee the production back in '85. He was a solo sailor who lost his sailboat in the South China Sea and needed work. I think his background was aero engineering and with both of us having engineering backgrounds, we communicated quite well, but at no point in time was there a discussion about changing the material of the fuel tank to Monel. The specs on the boat calls for "black iron".

Dee
My Ty37 (#423) has a black iron tank that I 'relined' with FRG/epoxy. Monel would most probably have been a special order ... a very 'wise' special order.
FWIW - its easy to 'reline' the black iron (bow) tank on a Ty37 ... using WEST and FG tape, etc. The Ty37 black iron tank rots from 'underneath' if you dont keep those limberholes clear and occasionally flushed out.
:-)
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post #26 of 31 Old 02-13-2010
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remove and empty the tank
put in 3 or 4 cups of clean fish tank gravel with 1/2 gal. of paint thinner
seal the tank and flip it over 50 or 60 times in all directions
pour off the thinner
repeat until the thinner pours off clear
shake out the gravel
add clean thinner shake, turn and pour it off
the tank will be spotless
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post #27 of 31 Old 02-14-2010
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That sounds like a pretty good plan. After I get the thing cleaned out, I can pressure test to see if it leaks. Probably not an issue putting about 5 psi on it and using a soap solution on all the joints. I am also looking to see what a replacement tank costs. Lots of good ideas here. Thanks
DD
5 PSI would turn your tank into a worthless balloon, if it doesn't rip apart and kill someone. This really isn't a safe thing to try unless you really really know what you are doing. I damn near overpressurized some test plugs rated for 7 psi on a piping system because the brand new gauge was defective! If it wasn't for a second gauge in the system we wouldn't have realized the first one was bad until it was too late!

Gary H. Lucas


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post #28 of 31 Old 02-14-2010
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5 psi is standard for testing a tank. My new stainless tank was tested to 5 psi - I watched it being built and tested because the welder is a friend. He used soap and an ultrasonic tester as well (a system where the escaping sound is amplified to headphones - makes a small leak sound nice and loud). But Gary is right - make sure it's no more than 5 psi as thay puts a fair amount of stress on the tank.

Brian
Living aboard in Victoria Harbour
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post #29 of 31 Old 02-14-2010
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I cleaned my 20 gal aluminum tank by swishing acetone around in it...letting is sit, and repeating a few times. then I let it evaporate dry, and to be abosolutely sure, I rinsed again with clean deisel and emptied it. It's back in the boat and working fine after two seasons. I guess there are a few ways to skin this cat.
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post #30 of 31 Old 02-15-2010 Thread Starter
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Lots of good ideas here, but how do I get rid of all this $^%## snow so I can get in the shop and get some work done?
DD

Doug
Jboat J/37c (new to me Jan 2011); J/22 #1003


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