Gas Tank Maintenance

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#1
I have a 2004 257 and am curious what others do to maintain their aluminum gas tanks. My tank is original to the boat, with no obvious signs for concern . . . and I'd like to keep it that way. My manual simply provides that the fuel storage tank area needs to be rinsed w/ fresh water periodically . I imagine removing the access plates and spraying the tank down with fresh water/salt away checks this box. Anything else I should be considering? Thanks in advance
 

seasick

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#2
Rinsing every now and then (end of season, mid season) with fresh water is as you say recommended by Grady and is is a good practice. That said, if your tank has not been rinsed, after 14-15 years, starting now isn't going to make a whole lot of difference.
I would be willing to bet that most owners don't rinse the tank regularly.
 
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three4one

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#3
I have a 2004 257 and am curious what others do to maintain their aluminum gas tanks. My tank is original to the boat, with no obvious signs for concern . . . and I'd like to keep it that way. My manual simply provides that the fuel storage tank area needs to be rinsed w/ fresh water periodically . I imagine removing the access plates and spraying the tank down with fresh water/salt away checks this box. Anything else I should be considering? Thanks in advance
I just did exactly that. I would suggest one enhancement. To make sure the bottoms of the tanks are rinsed plug the drain hole (temporarily) that allows water to drain from under the tanks. Your use of salt away is a good idea.
 

Fishtales

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#4
You'll probably never get the thing washed fully thru the inspection holes. More a placebo than anything else if you ask me. Once the boat gets older, raise the deck every 3 years and do a very good inspection still likely won't see what will get you on the underbelly.
 
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Ky Grady

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#5
I bought my 2004 228 back in April of '17 from Tampa Florida. The boat had been a saltwater boat it's whole 13 years. Brought it home to Kentucky and proceeded to de-salt it as best I could. I pulled my floor panels out and washed and rinsed my tanks as best I could. For the most part, I was surprised that they were in pretty decent shape. Had a flange fail on my auxiliary tank this past year so have a new tank being built and will pick up in a couple of weeks.

Here's some before and after pics.
20170730_160656.jpg 20170730_164535.jpg 20181105_165525.jpg
 

Fishtales

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#6
Sux that they don't last that long.... I've not had a problem. Pulled the decks last year and inspected. Looked ok for what I could see. Looks like you did a good job.
 
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I just did exactly that. I would suggest one enhancement. To make sure the bottoms of the tanks are rinsed plug the drain hole (temporarily) that allows water to drain from under the tanks. Your use of salt away is a good idea.
Good tip, I’ll try that
 

seasick

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#8
My year 208 (2001) does not have a removable deck cover:(. If you want to get to the tank, you have to cut the deck. The tank however is poly not aluminum and therefore doesn't have the same corrosion issues. I am not sure what model years don't have the removable deck panel.
 

OnoEric

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#11
My year 208 (2001) does not have a removable deck cover:(. If you want to get to the tank, you have to cut the deck. The tank however is poly not aluminum and therefore doesn't have the same corrosion issues. I am not sure what model years don't have the removable deck panel.
My 1995 hull originally had an aluminum tank with removable deck cover. But, the hull was replaced under warranty in 1997 and came back from Grady with a poly tank and a solid deck. (It also grew a bow pulpit too. Grady goes above and beyond with their warranties. The original owner literally got a brand new boat made in 1997 that has the 1995 style cuddy cabin, since that designed had changed by 1997, with the original HIN stamped into it). So I may have the only 1995 model 208 with a solid deck, poly tank, and 1997 style badging on the sides of the hull and cuddy. That also means that on the 208 model, they switched from aluminum to poly tanks in either 1996 or 1997.
 
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