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Old 08-11-2022, 09:30 PM   #1
City: nc
Join Date: Feb 2022
Posts: 3
Fuel leak

40 uropa mt we have a fule tank leak on port side i can't find it they are round tanks and look like new no rust at all to be seen only one fitting on bottom with Two plugs and one valve. The vent and fill fittings are on top of course. Could there be something else I'm not seeing Could there be another valve set somewhere on the outboard side. Any ideas yo check would be great I sure hate the idea of pulling the tank.
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Old 08-11-2022, 10:00 PM   #2
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 11,246
Always helpful to post pictures when seeking help on equipment problems.

It's worth examining the welds near where you think it might be leaking. Sometimes a poor weld can crack.

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Old 08-11-2022, 10:13 PM   #3
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City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 16,839
Get some of the blue paper towels and carpet the areas under the tank. The towels will change color when the fuel drips on them. Then you can get a clue where to start looking for the leak. It may run down the tank some but it is a place to start.
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Old 08-12-2022, 10:11 AM   #4
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City: Dewatto
Vessel Name: CHiTON
Vessel Model: Tung Hwa Clipper 30
Join Date: Jan 2020
Posts: 838
You can also cut paper towels into strips to use as telltales. Twist them into a string and tie them around every fuel line connector. The ones that turn pink (if that's your diesel color) show you the problem areas. Sometimes it's just a matter of tightening a fitting. Also works on hydraulic steering. I now tend to just leave them on. Looks a little weird in the engine room, but I prefer it to seeing a sheen on the bilgewater and not knowing where it came from.
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