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Old 09-20-2006, 01:43 AM   #1
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Default Fibreglass Diesel Tank

Hello, our boat is was built in the mid 80's and has a fibreglass fuel tank, we moved onto it about 12months ago. Recently whilst changing the primary fuel filter I noticed a thick gel like substance in the filter. I am wondering if the diesel is breaking down the fibreglass fuel tank, is there anyone else with fibreglass tanks?

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Greeny
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Old 09-20-2006, 02:01 PM   #2
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Not now but had them before. IMHO diesel fuel should not break down properly structured GRP.

I'd suggest it is more likely to be bio mould.

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JOHN
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Old 09-20-2006, 03:03 PM   #3
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I would agree with Swagman on that - is the gel a thick brownish to clear goo? Was the boat sitting for a while with a partially filled tank? Both a great way to grow tank sludge...
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Old 09-21-2006, 08:54 AM   #4
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I agree. I have an Endurance 37, built 1984, with 2 x 220 litre fibreglass tanks and have had no problem with them at all. I do however, make a point of occasionally draining and cleaning the tanks. Sounds like bio sludge to me.

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Craig
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Old 10-30-2006, 11:23 AM   #5
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Hello Paul,

It won't be the glass breaking down now. It it was a badly made fuel tank it would have showed up years ago. I have to go with the others and say it sounds like you got a dose of the bio mould. sorry mate! Me thinks you got to drain the fuel system and replace the filters and flush the lines out. Give it a double dose of the ANTIDOTE to be sure it's well treated.

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Peter

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