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lcfitt(at)sbcglobal.net
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 Posted: Thu Aug 10, 2006 4:33 pm Post subject: Fuel Smell Revisited |
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This topic was discussed recently, and thought I would follow up with this
account. I resloshed my right wing tank a couple of years ago and was
getting occasional cockpit fuel odors from time to time. And odors in the
hangar on hot days that I attributed to venting of the tanks due to
expansion. All of the previous scenarios was considered until I was flying
back from Quincy after delivering a friend to pick up his freshly annualed
Stearman.
Almost home I began getting a distinct fuel odor in flight. This was
something new. On getting home, I decided to go forward of the firewall for
the source of the smell and discovered a cut fuel line at the banjo bolt on
the right carburetor. It was wet to the touch, but thankfully not dripping.
Apparently when I changed out the Mil 6000 to the auto hose, several years
ago, I created a tight enough bend at the banjo fitting as it passed the
engine mount tube that over time the fitting began cutting the fuel hose
internally until it finally cut through.
I am now wondering if the hangar fumes and the occasional inflight odors -
usually when reducing power in the pattern were from an incipient seep in
the fuel line rather than an obstinate tank leak, as now the hangar smells
so much better and nothing in flight.
Lowell
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pulsair(at)mindspring.com
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| Posted: Thu Aug 10, 2006 5:30 pm Post subject: Fuel Smell Revisited |
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Lowell,
Very good information. That will become a part of my preflight. I sometimes
get fumes in the cockpit during a steep climb. When I level off it goes
away. I leave my cockpit door open in the hangar because I smell fumes in
the cockpit. I can't find a leak. I assumed that it may be coming from the
carbs. I don't know. Thanks for the insight. Jeff Classic IV
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mike
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| Posted: Fri Aug 11, 2006 6:29 am Post subject: Re: Fuel Smell Revisited |
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another place to check is the bowl gaskets. I have one carb slighly leaking at the bowl, just haven't changed the gasket yet. I can't smell it but the wife can??? you know how the ladies can be on smells. I keep checking the bowl, usually just a little stain wetness on the back of the bowl, but yet to change the gasket, was thinking of just pulling the bowl and flat filing with a fine file to get the high spots off. I generally pull the bowls every 25 hours to check for water and debrees.
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wingsdown(at)comcast.net
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