---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 07/14/15: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:57 PM - Re: 912 ULS Fuel Pressure (Roger Lee) 2. 09:07 PM - Re: 912 ULS Fuel Pressure (John Hauck) ________________________________ Message 1 _____________________________________ Time: 05:57:42 PM PST US Subject: RotaxEngines-List: Re: 912 ULS Fuel Pressure From: "Roger Lee" You can put a 10 psi gauge inline with the fuel at the balance tube assembly or if you don't have one then just plumb it inline. If your electric pump is plumbed in series it has a check valve that could cause an issue until it gets turned on. I doubt it's the mechanical pump, but you won't know for sure until you put a gauge inline. Possibly the fuel pressure gauge, again an unknow until you put a gauge inline. -------- Roger Lee Tucson, Az. Rotax Instructor & Rotax IRC Light Sport Repairman Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=444772#444772 ________________________________ Message 2 _____________________________________ Time: 09:07:42 PM PST US From: "John Hauck" Subject: RE: RotaxEngines-List: 912 ULS Fuel Pressure "T" a mechanical pressure gauge into your fuel line. john h Fort Lewis, WA From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Stan Tew Sent: Monday, July 13, 2015 3:47 PM Subject: RotaxEngines-List: 912 ULS Fuel Pressure My 912 ULS mounted in my Rans S7-S has 438 hr. I replaced the old style mechanical pump as recommended by Rotax. I have an electric fuel pump and fuel pressure gauge. I usually take off with the electric pump running in addition to the mechanical pump. When I level off to cruise I turn off the electric pump. My pressure usually is about 4.5 psi. Last week I was flying and noticed the EIS warning light and it identified my fuel pressure to be about 0.9 psi. I quickly turned on the electric pump. The pressure went to about 3.5 psi. I flew back and landed without incident. The engine never faltered. Any suggestion on how to test the mechanical pump? Any suggestion on what the problem might be? I have not had opportunity to remove the cowl to make any visual checks. Stan Tew N29TD ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.