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  #1  
Old 03-15-2023, 02:04 PM
SwimmingDragonfly96 SwimmingDragonfly96 is offline
 
Join Date: Oct 2022
Location: San Francisco, Ca
Posts: 80
Default Do you sump your gascolator?

Hello,

My 7A has a gascolator that's basically inaccessible to drain during pre-flight. Do you all sump your gascolators?
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  #2  
Old 03-15-2023, 02:15 PM
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Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
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Quote:
Originally Posted by SwimmingDragonfly96 View Post
Hello,
My 7A has a gascolator that's basically inaccessible to drain during pre-flight. Do you all sump your gascolators?
If you have a gascolator, it needs to be "sumped" before first flight of the day.
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  #3  
Old 03-15-2023, 02:26 PM
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Jpm757 Jpm757 is offline
 
Join Date: May 2013
Location: Sherman, CT
Posts: 1,112
Default

If a gascolator is installed it should be sumped prior to each flight ( just like the fuel tanks). Don't know where your gascolator is located, but if possible add an access panel of some sort to allow for draining AND cleaning the screen.
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RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017
(KOXC)Oxford, CT, (0NY0)North Creek, NY.
1941 J3 Cub skis, floats.
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  #4  
Old 03-15-2023, 04:01 PM
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MacCool MacCool is offline
 
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Location: central Minnesota
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My gascolator is the lowest point of my fuel system...therefore the most likely point where water is going to accumulate. Mine is very accessible so I always sump it as well as both tanks.
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  #5  
Old 03-15-2023, 04:49 PM
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Dugaru Dugaru is offline
 
Join Date: Jan 2016
Location: Richmond VA, USA
Posts: 678
Default Always

Itís a very important precaution. A flight instructor here was killed a few years ago due to water in the fuel tanks of a Tecnam.

Quote:
Originally Posted by SwimmingDragonfly96 View Post
Hello,

My 7A has a gascolator that's basically inaccessible to drain during pre-flight. Do you all sump your gascolators?
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N929JA, 2007 RV-9A
Based W96: New Kent International Aerodrome
(near Richmond, VA USA)
2023 Dues Paid
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  #6  
Old 03-15-2023, 06:43 PM
BoydBirchler BoydBirchler is offline
 
Join Date: Jul 2020
Location: Indianapolis
Posts: 228
Default

My RV7 originally had a gascolator. It was useless! It would not drain fuel unless I would turn on the boost pump.

When I changed to fuel injection I eliminated it and replaced it with an AFP high pressure boost pump, with a high flow fliter. The filter gets serviced at each condition inspection.

I sump the lowest point in my taildragger's fuel system: which is each tank's rear inboard main tank drains.

There are a lot of us out here that feel the placement of a gascolator ahead of the firewall, in that hot environment, is perfect for boiling fuel and causing vaporlock.
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  #7  
Old 03-15-2023, 07:02 PM
SwimmingDragonfly96 SwimmingDragonfly96 is offline
 
Join Date: Oct 2022
Location: San Francisco, Ca
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Jesus you guys are frightening me. Should I get rid of the gascolator?
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  #8  
Old 03-15-2023, 07:47 PM
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MacCool MacCool is offline
 
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Location: central Minnesota
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Quote:
Originally Posted by SwimmingDragonfly96 View Post
Jesus you guys are frightening me. Should I get rid of the gascolator?
That would certainly be an option, as long as you retained the ability to sump the lowest part of your fuel system.

I confess I'm a little baffled at the concept of not sumping the gascolator as an utterly routine part of the pre-flight. I've never found water in a gascolator either, but I've never translated that to meaning I don't need to check the rudder bolts or aileron/flap jam nuts just because I've never found them to be loose.
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RV-9A, 2011, bought flying
IO-320D1A (factory new), C/S
Dual Pmags
IFR equipped
AFS 5400/3500, G5, IFD440 navigator,
bunch of other stuff

Last edited by MacCool : 03-15-2023 at 09:01 PM.
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  #9  
Old 03-15-2023, 08:04 PM
tracy tracy is offline
 
Join Date: Dec 2012
Location: chattanooga,tn
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I have to remove cowling to access mine, so I strain it anytime the cowling is off. Never found water in it. Come think of it, I’ve never found water in the tanks.
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  #10  
Old 03-15-2023, 09:28 PM
Richard RG Richard RG is offline
 
Join Date: Jan 2021
Location: British Columbia, Canada
Posts: 36
Default every pre-flight inspection

Having owned a Mooney M20e for years found sumping the gascolator was a royal pain, having to climb into the cockpit each time, just to pull the little actuator ring on the pilot side floor to clear any water/debris that may have collected in the gascolator. Always, it came back clean.
Having gotten tired of this exercise each preflight, rationalized that checking the wing tank drains each time before flight would catch any contaminates, before they found their way to the gascolator. Wrong!
Apparently fuel injected engines are not tolerant of anything other than 100% clean fuel. It was no fun having the always smooth running engine start stumbling in the downwind leg to land. Luckily the loss of power was near a runway.
I mentioned my engine issue to an old timer pilot that has forgotten more than I can ever hope to learn and his first comment was, 'did you sump the gascolator?'
There was a wee bit of water/gunk had accumulated. Thereafter, I would not be comfortable to fly without first checking the gascolator.
The RV3 I now fly is carbed and maybe more tolerant of contaminates in the fuel? Though I have to turn the boost pump on then get down on my backside flat out on the floor to access the gascolator, would not consider flying without checking the gascolator.
My 2 cents
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