Fuel Vent Diesel discharge when fueling!
 

Good Evening's All - Much appreciate (incremental) remedies.

Comfit is a Carver 520 with 2*400 gal. tanks. There are two vents on the
sides (2 per each) that will vent diesel after filling 10 gal. into 200
gal void.

I just spent 1.5 hours putting 200 gal. into each of two 400 gal. tanks. We
had to put a cloth over the two vents to stop diesel going into the water.

Do you have any suggestions on how I could fix this?

Dave

Fuel Vent Diesel discharge when fueling!
 

On Nov 26, 6:40 pm, "Dave Isherwood" wrote:
Good Evening's All - Much appreciate (incremental) remedies.

Comfit is a Carver 520 with 2*400 gal. tanks. There are two vents on the
sides (2 per each) that will vent diesel after filling 10 gal. into 200
gal void.

I just spent 1.5 hours putting 200 gal. into each of two 400 gal. tanks. We
had to put a cloth over the two vents to stop diesel going into the water.

Do you have any suggestions on how I could fix this?

Dave

Been there. Sometimes the vent lines trap some fuel in a low spot,
like a sink trap, which interferes with effective tank venting. It's
not much fun, but if you wipe off the vent fitting and then get a seal
with either your mouth or rubber hose or something and then blow back
down into the vent line you can clear the trapped fuel and the vent
will breath again. If that was the problem, you'll actually sense the
hose being cleared by some back pressure and then a release along with
some gurgling noise.

Fuel Vent Diesel discharge when fueling!
 

On Nov 26, 6:40�pm, "Dave Isherwood" wrote:
Good Evening's All - Much appreciate (incremental) remedies.

Comfit is a Carver 520 with 2*400 gal. tanks. There are two vents on the
sides (2 per each) that will vent diesel after filling 10 gal. into 200
gal void.

I just spent 1.5 hours putting 200 gal. into each of two 400 gal. tanks. We
had to put a cloth over the two vents to stop diesel going into the water.

Do you have any suggestions on how I could fix this?

Dave

Larger diameter vent lines.

Any time you add fuel to a tank faster than you can evacuate the
displaced air, you wind up with a pressurized tank and that can begin
dribbling fuel through the vent at an early stage of the fill up.

How is your fill pipe configured? You might be able to relieve some of
the pressure by sticking the nozzle only part way into the fill pipe
and allowing some of the displaced air to escape at that point.

A third consideration is the baffling in your tanks. It sounds like
you waited until you were on fumes to fill up,-if you put 400 gallons
of fuel into a 400 gallon system. Air can build up behind one of the
baffles that were installed to discourage your fuel from sloshing
around with wild abandon. As you fill up the tank, you can get to a
point where an glob of air finally gets squeezed out and that can
carry droplets out the vent.
If you are amost completely empty, stop pumping after 15-20 gallons
and rock the boat for a few seconds to "burp" the baffles. One
advantage of filling up before running entirely out is that there is
less air to manage.

Finally, what do you mean by putting a rag "over the vent"? You
certainly don't want to impede the passage of air through the vent. My
tank vents are through the gunwales, and are situated parallel to the
surface of the water. I hold a "diaper" (fuel abosorbing pad) *under*,
not over the vent when fueling. By listening to the tone of fuel
flowing into the filler pipe its possible to get a sense of when the
tnak is nearly full, and then pump very, very slowly. At the very
most, you might get a half teaspoon of diesel on the diaper if you
aren't pumping too fast.

Fuel Vent Diesel discharge when fueling!
 

"Dave Isherwood" wrote in news:ssL2j.157710$kj1.50776
@bgtnsc04-news.ops.worldnet.att.net:

Do you have any suggestions on how I could fix this?


The idiots put the tank vent fitting right next to where the fuel is
spraying into the tank. As the fuel splashes into the fuel that's already
in the tank, it splashes back up to the vent hole to get sucked up by the
outgoing vapor, sucking the fuel up the vent hose and overboard causing
that woman in the sailboat to start screaming about global warming, again.
Install another vent on the OTHER end of the tank and block off the
original next to the filler inlet.

We're all lucky boat companies don't make toilets for the home!

Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
.....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

Fuel Vent Diesel discharge when fueling!
 

On Tue, 27 Nov 2007 05:25:04 +0000, Larry wrote:

"Dave Isherwood" wrote in news:ssL2j.157710$kj1.50776
:

Do you have any suggestions on how I could fix this?


The idiots put the tank vent fitting right next to where the fuel is
spraying into the tank. As the fuel splashes into the fuel that's already
in the tank, it splashes back up to the vent hole to get sucked up by the
outgoing vapor, sucking the fuel up the vent hose and overboard causing
that woman in the sailboat to start screaming about global warming, again.
Install another vent on the OTHER end of the tank and block off the
original next to the filler inlet.

We're all lucky boat companies don't make toilets for the home!

Larry

Why not just put the vent on the other side of the boat so the friggin'
woman can't see it?
--
John H

Fuel Vent Diesel discharge when fueling!
 

West marine carries a check ball for the fuel vent line. You may be able to
use larger lines or change where the vents are connected to the tank as
well.

"Dave Isherwood" wrote in message
...
Good Evening's All - Much appreciate (incremental) remedies.

Comfit is a Carver 520 with 2*400 gal. tanks. There are two vents on the
sides (2 per each) that will vent diesel after filling 10 gal. into 200
gal void.

I just spent 1.5 hours putting 200 gal. into each of two 400 gal. tanks.
We had to put a cloth over the two vents to stop diesel going into the
water.

Do you have any suggestions on how I could fix this?

Dave

Fuel Vent Diesel discharge when fueling!
 

"John H." wrote in message
...

Why not just put the vent on the other side of the boat so the *friggin'
woman* can't see it?
--
John H


So now you're insulting a stramgers woman! Quite a piece of work you are
Johnny.

Fuel Vent Diesel discharge when fueling!
 

On Tue, 27 Nov 2007 10:59:15 -0400, "Don White"
wrote:


"John H." wrote in message
.. .

Why not just put the vent on the other side of the boat so the *friggin'
woman* can't see it?
--
John H


So now you're insulting a stramgers woman! Quite a piece of work you are
Johnny.


Whose woman?

How's your mom doing, Don? I hope all is well with her.
--
John H

Fuel Vent Diesel discharge when fueling!
 

John H. wrote in
:

Why not just put the vent on the other side of the boat so the
friggin'
woman can't see it?
--
John H



At $4/gallon, the woman becomes a moot point when paying for fuel
dumped overboard....

Larry
--
Isn't it ironic that the same ISPs that are telling you
you're downloads threaten their networks......
.....are testing 100Gbps TV to sell on the SAME systems?
http://tinyurl.com/27qx3v

Fuel Vent Diesel discharge when fueling!
 

"John H." wrote in message
...
On Tue, 27 Nov 2007 05:25:04 +0000, Larry wrote:

"Dave Isherwood" wrote in news:ssL2j.157710$kj1.50776
:

Do you have any suggestions on how I could fix this?


The idiots put the tank vent fitting right next to where the fuel is
spraying into the tank. As the fuel splashes into the fuel that's already
in the tank, it splashes back up to the vent hole to get sucked up by the
outgoing vapor, sucking the fuel up the vent hose and overboard causing
that woman in the sailboat to start screaming about global warming, again.
Install another vent on the OTHER end of the tank and block off the
original next to the filler inlet.

We're all lucky boat companies don't make toilets for the home!

Larry

Why not just put the vent on the other side of the boat so the friggin'
woman can't see it?
--
John H

When my boat started burping, the vent line had shifted and had a loop low
point. I rerouted the line and all is well. I do have a check valve in the
line, but that stops the burping out the overflow, but the fuel backs up the
fill spout as the air can not exit the vent when there is fuel in the vent
line.