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Black crud in gascolator

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lgold(at)quantum-associat
Guest

Posted: Mon Feb 18, 2008 10:18 am Post subject: Black crud in gascolator

At 8 hours TT  and now again at 15 hours, I noticed a lot of small non-magnetic black  particle specks in fuel drained from the gascolator and tank drains on  my new 701. These particles settle to the bottom of the drained fuel  and stop coming out after draining about 6 ounces. My 701 has only  one gascolator that is placed in the fuel line on the engine side  of the firewall just downstream of two fuel filters (one for each wing  tank). 

 I don't  understand how the gascolator could get dirty downstream of the filters and  don't know where the specs are coming from. I cleaned everything with a  vacuum cleaner and with compressed air pressure before connecting  the lines.  The black specs are non-metallic and I don't think they  are aluminum. My fuel lines are Aeroquip, stainless steel clad, top-of-the-line,  and the fuel filters are 10 micron stainless screens that are about 1' in  diameter. So far there has been no decrease in fuel flow or engine  power. Has anyone else had this problem and there something I  should be doing about it besides checking the fuel  filters?

 Thanks for the  help,

Les  

   [quote][b]

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Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Mon Feb 18, 2008 11:10 am Post subject: Re: Black crud in gascolator

Have you looked at the filters? Where are you getting your gas?

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601XL Under Construction
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lgold(at)quantum-associat
Guest

Posted: Mon Feb 18, 2008 12:26 pm Post subject: Black crud in gascolator

W.R.,

I will look at the filters this week but there is no noticeable blockage in

the lines. I use the best gas I can find in the area, 91 octane Chevron and

I filter all gas as I put it in the tanks. The crud is not coming from the

gas station.

Les



[quote] --

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Mon Feb 18, 2008 6:02 pm Post subject: Black crud in gascolator

Does the fuel have alcohol in it? Are your fuel lines alcohol proof?

On Feb 18, 2008, at 1:15 PM, Les Goldner wrote:

 	  Quote: 	
		    At 8 hours TT and now again at 15 hours, I noticed a lot of small non-magnetic black particle specks in fuel drained from the gascolator and tank drains on my new 701. These particles settle to the bottom of the drained fuel and stop coming out after draining about 6 ounces. My 701 has only one gascolator that is placed in the fuel line on the engine side of the firewall just downstream of two fuel filters (one for each wing tank). 

 I don't understand how the gascolator could get dirty downstream of the filters and don't know where the specs are coming from. I cleaned everything with a vacuum cleaner and with compressed air pressure before connecting the lines.  The black specs are non-metallic and I don't think they are aluminum. My fuel lines are Aeroquip, stainless steel clad, top-of-the-line, and the fuel filters are 10 micron stainless screens that are about 1' in diameter. So far there has been no decrease in fuel flow or engine power. Has anyone else had this problem and there something I should be doing about it besides checking the fuel filters?

 Thanks for the help,

Les  

  	  Quote: 	
		  	


	


 -- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.



 



 [quote][b]

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

billmileski

Joined: 07 Aug 2006
Posts: 68
Location: Ledyard, CT

Posted: Mon Feb 18, 2008 6:07 pm Post subject: Re: Black crud in gascolator

Les,

Double-check the Aeroquip specs to see if it is recommended for autofuel (and its alcohol, toluene, etc.).  I found that some of the aviation fuel line prohibits autofuel, might be worth checking.  That would mean the black specs are decomposing fuel line material, but I don't know if that makes any sense.  Good luck,



Bill Mileski

Ledyard, CT

701 912S 116hrs

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lgold(at)quantum-associat
Guest

Posted: Tue Feb 19, 2008 9:40 am Post subject: Black crud in gascolator

Bryan,

 Since I  used the most expensive unlimited shelf  life fuel line sold by Spruce, I just assumes it was alcohol proof. But now you  have me wondering.  I put a call in to Aeroquip's tech staff to find  out if the line is alcohol proof... no answer yet!

 Les



 [quote]         From: owner-zenith-list-server(at)matronics.com    [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Bryan    Martin

Sent: Monday, February 18, 2008 5:59 PM

To:    zenith-list(at)matronics.com

Subject: Re: Black crud in    gascolator

   

Does the fuel have alcohol in it? Are your fuel lines alcohol    proof?

      On Feb 18, 2008, at 1:15 PM, Les Goldner wrote:

    	  Quote: 	
		            At 8 hours      TT and now again at 15 hours, I noticed a lot of small non-magnetic      black particle specks in fuel drained from the gascolator and tank      drains on my new 701. These particles settle to the bottom of the      drained fuel and stop coming out after draining about 6 ounces. My 701      has only one gascolator that is placed in the fuel line      on the engine side of the firewall just downstream of two fuel      filters (one for each wing tank). 

     I don't      understand how the gascolator could get dirty downstream of the filters      and don't know where the specs are coming from. I cleaned      everything with a vacuum cleaner and with compressed air pressure      before connecting the lines.  The black specs are non-metallic and      I don't think they are aluminum. My fuel lines are Aeroquip, stainless steel      clad, top-of-the-line, and the fuel filters are 10 micron stainless screens      that are about 1' in diameter. So far there has been no decrease      in fuel flow or engine power. Has anyone else had this problem and there      something I should be doing about it besides checking the fuel      filters?

     Thanks for the      help,

Les  

 	  Quote: 	
		  	


	


         -- 

   Bryan Martin

   N61BM, CH 601 XL,

   RAM Subaru, Stratus redrive.

   do not archive.

   

   



 	  Quote: 	
		  



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Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Tue Feb 19, 2008 11:49 am Post subject: Re: Black crud in gascolator

You might want to try here and look up the hose you used.



http://hydraulics.eaton.com/products/fluid_conveyance_aeroquip.htm

 	  lgold(at)quantum-associat wrote: 	
		  Bryan,

 Since I  used the most expensive unlimited shelf  life fuel line sold by Spruce, I just assumes it was alcohol proof. But now you  have me wondering.  I put a call in to Aeroquip's tech staff to find  out if the line is alcohol proof... no answer yet!

 Les

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_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

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