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Electric Fuel pump

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Scudrunner

Joined: 31 Aug 2012
Posts: 26

Posted: Tue Oct 07, 2014 7:07 am Post subject: Electric Fuel pump

My Classic Monowheel 1st flew in 1996, and I'm wondering if the facet electric fule pump is now starting to show its age.



I have a fuel pressure guage that measures at the carb inlets and always test the electric pump before starting the engine. I don't remember the units here and now, but I get only a 20% deflection relative to the pressure I get from the mechanical pump (engine running). But then I guess that the stationary mechanical pump will restrict the fuel pressure with the engine stationary?



Anyway, I just wondered if anyone else has a fuel pressure guage similarly fitted and can advise on what pressure they see from the facet only?



Thanks

Howard

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cakeykev(at)gmail.com
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Posted: Tue Oct 07, 2014 7:25 am Post subject: Electric Fuel pump

I get a higher pressure with the electric pump    on and the engine stopped than with just the engine running and no electric pump. Does that help?



Kevin Challis

 	  Quote: 	
		   On 7 Oct 2014, at 16:07, Scudrunner <howardbrooksster(at)gmail.com> wrote:

 

 

 

 My Classic Monowheel 1st flew in 1996, and I'm wondering if the facet electric fule pump is now starting to show its age.

 

 I have a fuel pressure guage that measures at the carb inlets and always test the electric pump before starting the engine. I don't remember the units here and now, but I get only a 20% deflection relative to the pressure I get from the mechanical pump (engine running). But then I guess that the stationary mechanical pump will restrict the fuel pressure with the engine stationary?

 

 Anyway, I just wondered if anyone else has a fuel pressure guage similarly fitted and can advise on what pressure they see from the facet only?

 

 Thanks

 

 

 Howard

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=431605#431605

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Scudrunner

Joined: 31 Aug 2012
Posts: 26

Posted: Tue Oct 07, 2014 7:42 am Post subject: Re: Electric Fuel pump

Thanks Kevin, that does suggest that my electric pump is on its way out!

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budyerly(at)msn.com
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Posted: Tue Oct 07, 2014 11:46 am Post subject: Electric Fuel pump

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Howard,

 Facet fuel pump required is the 40106 which delivers between 4 and 7 psi  depending on high flow or low flow, that is no restriction, high  restriction.

 You should be seeing about 7 psi.  Use a fuel pressure guage to assure  the sender is working properly.

  

 Aircraft Spruce has them in stock:  PN 40106 12 volt 4-7 Psi,  32gph and will lift fuel at least 12 inches.  Price about $37US.

  

 Regards,

 Bud Yerly

             Facet No.     Volts     PSI Max-Min     GPH     Fitting Size     Lift Min. Dry     Check Valve     Position Shut Off      Valve     Description     Part Number     Price   

             40106     12     7.0-4.0     32     1/8 - 27 INT     12”     N     N     Facet Solid        State Fuel Pump     40106     $36.65

             40106     12     7.0-4.0     32     1/8 - 27 INT     12”     N     N     Facet Solid        State Fuel Pump     40106     $36.65

 [quote]   ---

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Scudrunner

Joined: 31 Aug 2012
Posts: 26

Posted: Wed Oct 08, 2014 5:44 am Post subject: Re: Electric Fuel pump

Thanks Bud - you successfully pre-empted my next question!

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