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Hoses and O-rings in RV-6 with Lycoming O-320

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genie(at)swissmail.org
Guest

Posted: Sun Apr 08, 2012 7:45 am Post subject: Hoses and O-rings in RV-6 with Lycoming O-320

My plan is to enable my RV-6 and its O-320 engine to run on Mogas, 

including the variety that contains ethanol. I have taken a good look 

at the fuel system and done some dismantling but I have found no 

O-rings. The fuel system contains several hoses, some black, some 

wrapped in dark orange. I suppose that the latter is to protect them, 

is it not?



I would be grateful if anyone could tell me how many hoses an RV-6 

has in its fuel system, what their dimensions are and whether the 

fuel system also included O-rings or anything else that may be 

susceptible to Mogas, ethanol or water. If that is the case I would 

like to know how many of these are present and what their dimensions 

are. Thanks.



Kind regards



George Nielsen

RV-6 PH-XGN

The Hague, the Netherlands

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ceengland(at)bellsouth.ne
Guest

Posted: Sun Apr 08, 2012 3:36 pm Post subject: Hoses and O-rings in RV-6 with Lycoming O-320

On 04/08/2012 09:48 AM, George Nielsen wrote:

 	  Quote: 	
		   



 My plan is to enable my RV-6 and its O-320 engine to run on Mogas, 

 including the variety that contains ethanol. I have taken a good look 

 at the fuel system and done some dismantling but I have found no 

 O-rings. The fuel system contains several hoses, some black, some 

 wrapped in dark orange. I suppose that the latter is to protect them, 

 is it not?



 I would be grateful if anyone could tell me how many hoses an RV-6 has 

 in its fuel system, what their dimensions are and whether the fuel 

 system also included O-rings or anything else that may be susceptible 

 to Mogas, ethanol or water. If that is the case I would like to know 

 how many of these are present and what their dimensions are. Thanks.



 Kind regards



 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands

If the fuel system is 'stock', as designed by Van's, and you have the 
	


standard fuel pickups in the tanks (not the 'flop tubes'),  then there 

should be only aluminum line & aluminum fittings from the tank to the 

firewall, with metal-to-metal flare fittings; no O-rings. Van's stock 

fuel selector should be fine, as well. Depending on age, if you have a 

gascolator, it could very well have rubber gaskets that alcohol will 

attack. The flexible hoses are an unknown. If you can't determine the 

actual materials in the hoses, the safe thing would be to simply replace 

.them with teflon lined hose. (USA FAA recommendation is to replace any 

but the new teflon type hose every 5 years, anyway, though many people 

don't do that.) The mechanical fuel pump will likely need to be rebuilt 

with current technology diaphragms & seals; older mechanical pumps *do 

not* survive alcohol for very long. The carb or injector is likely OK, 

but I'd contact the manufacturer to be sure.



Hope that helps,



Charlie

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BARRY CHECK 6

Joined: 15 Mar 2011
Posts: 738

Posted: Sun Apr 08, 2012 6:17 pm Post subject: Hoses and O-rings in RV-6 with Lycoming O-320

George:



Unless you went with some NON-Aviation hoses there is NOTHING that you have to do.

ALL aviation hoses have to comply with the ability to handle alcohol in 100% concentrations.

  When a GA aircraft receives the STC for MoGas all the testing was performed on the engine and air frame as supplied from the factory - NO physical changes have to take place.

Ethanol is a problem with fiberglass fuel tanks and what is known as PRC sealants.  Other than that GO FOR IT.  And if you do a little online homework you will find a procedure to "WASH" the ethanol out of MoGas.

 



Barry

Sun, Apr 8, 2012 at 10:48 AM, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:  [quote]--> RV6-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

   

 My plan is to enable my RV-6 and its O-320 engine to run on Mogas, including the variety that contains ethanol. I have taken a good look at the fuel system and done some dismantling but I have found no O-rings. The fuel system contains several hoses, some black, some wrapped in dark orange. I suppose that the latter is to protect them, is it not?

   

 I would be grateful if anyone could tell me how many hoses an RV-6 has in its fuel system, what their dimensions are and whether the fuel system also included O-rings or anything else that may be susceptible to Mogas, ethanol or water. If that is the case I would like to know how many of these are present and what their dimensions are. Thanks.

   

 Kind regards

 

 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands

 

 

 ====================================

 rget="_blank">http://www.matronics.com/Navigator?RV6-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 [b]

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Doug Gray

Joined: 10 Jan 2006
Posts: 112
Location: Sydney, Australia

Posted: Sun Apr 08, 2012 10:20 pm Post subject: Hoses and O-rings in RV-6 with Lycoming O-320

PRC manufactures amongst other things  polysulphide fuel tank sealant (aka Proseal) that is universally used in RV fuel tanks..  I thought Proseal was compatible with alcohol; is that not the case? Does PRC mean something else?

Doug



Sent from my iPad



On 09/04/2012, at 12:14 PM, FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)> wrote:



[quote]George:



Unless you went with some NON-Aviation hoses there is NOTHING that you have to do.

ALL aviation hoses have to comply with the ability to handle alcohol in 100% concentrations.

  When a GA aircraft receives the STC for MoGas all the testing was performed on the engine and air frame as supplied from the factory - NO physical changes have to take place.

Ethanol is a problem with fiberglass fuel tanks and what is known as PRC sealants.  Other than that GO FOR IT.  And if you do a little online homework you will find a procedure to "WASH" the ethanol out of MoGas.

 



Barry

Sun, Apr 8, 2012 at 10:48 AM, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:   	  Quote: 	
		  --> RV6-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

   

 My plan is to enable my RV-6 and its O-320 engine to run on Mogas, including the variety that contains ethanol. I have taken a good look at the fuel system and done some dismantling but I have found no O-rings. The fuel system contains several hoses, some black, some wrapped in dark orange. I suppose that the latter is to protect them, is it not?

   

 I would be grateful if anyone could tell me how many hoses an RV-6 has in its fuel system, what their dimensions are and whether the fuel system also included O-rings or anything else that may be susceptible to Mogas, ethanol or water. If that is the case I would like to know how many of these are present and what their dimensions are. Thanks.

   

 Kind regards

 

 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands

 

 

 ====================================

 rget="_blank">http://www.matronics.com/Navigator?RV6-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 

	


[b]

- The Matronics RV6-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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BARRY CHECK 6

Joined: 15 Mar 2011
Posts: 738

Posted: Mon Apr 09, 2012 4:12 am Post subject: Hoses and O-rings in RV-6 with Lycoming O-320

Doug:



You are correct.

PRC, PROSEAL and other manufactures, are Polysulphide Sealants.

Two answers:

1 - The OLD chemistry was compatible to alcohol - The chemistry of today for the sealant is not as good.

 2 - The OLD chemistry did not have to deal with ethanol and from doing sealing jobs on Grumman's (wet wings), I find it does NOT hold up to today's MoGas.  There are other sealants that are NOT available in the USA due to EPA regulations.  MAYBE, they will hold up.  But, there is also a lot of other new chemicals known as AROMATICS that have been added to MoGas, they also attack the sealant.   

 



Barry

On Mon, Apr 9, 2012 at 2:17 AM, Doug Gray <dgra1233(at)bigpond.net.au (dgra1233(at)bigpond.net.au)> wrote:

 [quote]PRC manufactures amongst other things  polysulphide fuel tank sealant (aka Proseal) that is universally used in RV fuel tanks..  I thought Proseal was compatible with alcohol; is that not the case? Does PRC mean something else?

 Doug



Sent from my iPad



On 09/04/2012, at 12:14 PM, FLYaDIVE <flyadive(at)gmail.com (flyadive(at)gmail.com)> wrote:





  	  Quote: 	
		  George:



Unless you went with some NON-Aviation hoses there is NOTHING that you have to do.

ALL aviation hoses have to comply with the ability to handle alcohol in 100% concentrations.

   When a GA aircraft receives the STC for MoGas all the testing was performed on the engine and air frame as supplied from the factory - NO physical changes have to take place.

Ethanol is a problem with fiberglass fuel tanks and what is known as PRC sealants.  Other than that GO FOR IT.  And if you do a little online homework you will find a procedure to "WASH" the ethanol out of MoGas.

  



Barry



Sun, Apr 8, 2012 at 10:48 AM, George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:

    	  Quote: 	
		  --> RV6-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

    

 My plan is to enable my RV-6 and its O-320 engine to run on Mogas, including the variety that contains ethanol. I have taken a good look at the fuel system and done some dismantling but I have found no O-rings. The fuel system contains several hoses, some black, some wrapped in dark orange. I suppose that the latter is to protect them, is it not?

    

 I would be grateful if anyone could tell me how many hoses an RV-6 has in its fuel system, what their dimensions are and whether the fuel system also included O-rings or anything else that may be susceptible to Mogas, ethanol or water. If that is the case I would like to know how many of these are present and what their dimensions are. Thanks.

    

 Kind regards

 

 George Nielsen

 RV-6 PH-XGN

 The Hague, the Netherlands

 

 



 ====================================

 rget="_blank">http://www.matronics.com/Navigator?RV6-List

 ====================================

 http://forums.matronics.com

 ====================================

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ====================================

 

 

 

 

	






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