Today's Message Index:
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1. 04:13 AM - Re: Re: Gasoline smell (Gordon)
2. 11:33 AM - Re: Gasoline smellGasoline smell (kissell)
Message 1
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| Subject: | Re: Gasoline smell |
I'm now inclined to believe that Johann G is right-on, I have two of the
AS brass "homebuilder shut-off valves" and although there is no
noticeable leaking the smell does seem to be stronger in that area, and
I have checked every other possibility. I've discounted the permeable
fuel hose idea, because there is absolutely no fuel smell in the wings
(after removing an inspection plate). I can live with it --- just want
to know the cause.
Gordon
----- Original Message -----
From: "kissell" <kissellr@ameritech.net>
Sent: Wednesday, April 01, 2009 5:24 PM
Subject: Zenith701801-List: Re: Gasoline smell
<kissellr@ameritech.net>
>
> A little additional insight to the gas "smell". Per the Zenith
materials list the 701 uses about 18 feet of fuel line. I just measured
the circumference (C) of the new AS line at 1 5/8 inch. If you multiply
this C by the 18 feet of line and assume about 80% of this computed area
is in the cabin and fuse area, you end up with about 2 sq. feet of
surface area that potentially can out-gas fumes. We all know that even
a small amount of fuel can create a noticeable smell, it is possible the
line I used is permeable to some of the VOC's in the fuel and might
cause the "smell". The line that I just purchased is made by Parker and
designed to prevent the out-gas problem. So if that is the source, then
by replacement of the line with something designed for that problem, it
should go away. If the line is not the problem, then I just spent $100
to eliminate the line as a source.
>
> Bob K.
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> Read this topic online here:
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> http://forums.matronics.com/viewtopic.php?p=237286#237286
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Message 2
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| Subject: | Re: Gasoline smellGasoline smell |
I did a little more research today and found the following. Per EPA study, rubber
fuel line such as used on lawn mowers and RV equipment can out-gas as much
as 5 gram (weight) of fuel per foot per day. Using this number I estimate that
the lines in a 701 fuse and cockpit could out-gas about 0.424 liquid oz. per
day. That is certainly enough to create a smell in the cabin. Also stated in the
study was that replacing the lines with newer out-gas free lines could reduce
the permeability by 95%. So many 701 seem to have the smell problem that it
is unlikely a leak or we all don't know how to connect rubber hose without leaks.
The best I can remember the hose I used came from Zenith with the kit. I
might have bought or replaced it with hose from the local auto store, but it
wasn't anything special as I recall. It is similar to lawnmower fuel line. Just
another observation..
Bob Kissell
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=237401#237401
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