---------------------------------------------------------- RV6-List Digest Archive --- Total Messages Posted Sun 04/08/12: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:45 AM - Hoses and O-rings in RV-6 with Lycoming O-320 (George Nielsen) 2. 04:36 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (Charlie England) 3. 07:17 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (FLYaDIVE) 4. 11:20 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (Doug Gray) ________________________________ Message 1 _____________________________________ Time: 08:45:17 AM PST US From: George Nielsen Subject: RV6-List: 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 ________________________________ Message 2 _____________________________________ Time: 04:36:13 PM PST US From: Charlie England Subject: Re: RV6-List: Hoses and O-rings in RV-6 with Lycoming O-320 On 04/08/2012 09:48 AM, George Nielsen wrote: > > 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 ________________________________ Message 3 _____________________________________ Time: 07:17:32 PM PST US Subject: Re: RV6-List: Hoses and O-rings in RV-6 with Lycoming O-320 From: FLYaDIVE 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 wrote: > > 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 > > ________________________________ Message 4 _____________________________________ Time: 11:20:06 PM PST US Subject: Re: RV6-List: Hoses and O-rings in RV-6 with Lycoming O-320 From: Doug Gray PRC manufactures amongst other things polysulphide fuel tank sealant (aka P roseal) that is universally used in RV fuel tanks.. I thought Proseal was c ompatible 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 wrote: > George: > > Unless you went with some NON-Aviation hoses there is NOTHING that you hav e to do. > ALL aviation hoses have to comply with the ability to handle alcohol in 10 0% concentrations. > When a GA aircraft receives the STC for MoGas all the testing was performe d on the engine and air frame as supplied from the factory - NO physical cha nges have to take place. > Ethanol is a problem with fiberglass fuel tanks and what is known as PRC s ealants. 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 wrote: > > My plan is to enable my RV-6 and its O-320 engine to run on Mogas, includi ng the variety that contains ethanol. I have taken a good look at the fuel s ystem 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 t hat 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 i ts fuel system, what their dimensions are and whether the fuel system also i ncluded O-rings or anything else that may be susceptible to Mogas, ethanol o r water. If that is the case I would like to know how many of these are pres ent 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 > ========================= > > > > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv6-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV6-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv6-list Browse Digests http://www.matronics.com/digest/rv6-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.