fuel tanks question

[Mauro]

Any tips on assessing the integrity of the fuel tanks ? I have a 1988 20' open I am intending to get sea worthy this spring and the fuel tanks is something I think I should address before she gets in the water.

Thanks

[Ship]

The deck plates come off but if foamed in, you will need to remove the foam because the tanks usually corrode between the foam and tank. And particularly on the bottom. If they have been replaced, check to see if they were coated.

[Quik Fix]

You could pressure test. Just a few pounds and see if it holds overnight.

[Ship]

By far the easiest if you have the equipment. Or are willing to buy it.

[Quik Fix]

Just plug up the lines and use a test plug from the plumbing section. Hand bycicle pump should work. I made my own air fitting years ago. Think easy and cheap and you'll come up with something.

[Mauro]

Thanks for the tip.

Did you do the plugging and adding fitting at the tank after removing the decking or did you do it somewhere else?

Also the deck sections have some caulking in the seams. What brand/type of caulking would you use when replacing the deck sections?

Thanks again

[Quik Fix]

It is easier with the deck plates off and lets you see if something is amiss. I don't reseal.

[Fisherlady2]

If you do prefer to reseal I would just use Boatlife, it is easy and cuts away easily later when you want to lift the panels again... it also cleans easily.

[Quik Fix]

Yes, what Karen said and whatever you do, don't use silicone.

[Ship]

Or 5200. Or so I'm told. I have used it an removed them again but now I would recommend Boatlife as well.

[Boatsparky]

Do they leak? If not, a pressure test may not tell you much. Just my humble opinion. Assess by pulling them. You may be surprised what you find on a 33 year old tank.
What Ship said on corrosion spots.