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Old 10-09-2012, 15:53   #1
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Question Fuel Line Question

the daughter came by and remarked that she smelled diesel fuel. We don't smell it unless the boat has been closed up for a day or so. So it's isn't real bad.
While looking for source of smell, I found no leaks on main tank or lines. But I did find that the installer of the diesel genset and separate tank, did something I don't understand. He ran one 1/2" fuel line out of the tank, then installed a T. Off of the T he took one leg to the generator, and one line to the vent!!!!!!!!!!!!! This just seems wrong in so many ways. I am not a fluid engineer, but I don't understand how the vent would work if the line is full of fuel running to the gen. Or why doesn't the generator suck air from the vent line across the T.
What am I not seeing or understanding?
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Old 10-09-2012, 16:02   #2
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Re: Fuel Line Question

That fuel line to the tank is probably the RETURN line from the injector rail, which is not typically under pressure or suction. Perhaps the vent line is usable on the return line, not sure.

The fuel line from the tank should go directly to a racor filter and then to the engine lift pump. I've seen it tee'd via a selector valve to the main diesel fuel line for convenience when either tank is low.
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Old 10-09-2012, 16:02   #3
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Re: Fuel Line Question

Are you sure this isn't the return line from the genset. If so, it isn't unusual providing the vent outlet is reasonably higher than the top of the tank.
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Old 10-09-2012, 16:18   #4
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Re: Fuel Line Question

I will check farther as that makes sense, I must have missed something. I was upside down and in a small space
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Old 10-09-2012, 16:44   #5
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Re: Fuel Line Question

A lot of times, new folks coming aboard will smell diesel, where we as liveaboards have become so used to this smell we no longer smell it !! that do not mean theres a leak! but it comes with haveing diesel aboard and haveing vent lines that let a little of the diesel smell be in the air ! mostly it's faint we have gotten used to it !! sometimes ya wonder why folks look at ya funny in line at the grocery store? its the faint to us diesel smell in our clothing LOL if ya ck all the lines and put some type of paper below the probale place leaks might be and ya don't find any then it's just the OLD diesel smell blues !! Just a thought !!
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Old 10-09-2012, 17:51   #6
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Re: Fuel Line Question

Quote:
Originally Posted by bobconnie View Post
A lot of times, new folks coming aboard will smell diesel, where we as liveaboards have become so used to this smell we no longer smell it !! that do not mean theres a leak! but it comes with haveing diesel aboard and haveing vent lines that let a little of the diesel smell be in the air ! mostly it's faint we have gotten used to it !! sometimes ya wonder why folks look at ya funny in line at the grocery store? its the faint to us diesel smell in our clothing LOL if ya ck all the lines and put some type of paper below the probale place leaks might be and ya don't find any then it's just the OLD diesel smell blues !! Just a thought !!
I thought everybody smelled like that
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