---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 10/15/10: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:13 AM - Too high fuel pressure (Hans J. Danielsen) 2. 06:46 AM - Re: Too high fuel pressure (Brian Davies) 3. 08:16 AM - 912 compression (William Daniell) ________________________________ Message 1 _____________________________________ Time: 04:13:38 AM PST US From: "Hans J. Danielsen" Subject: Europa-List: Too high fuel pressure Hi all, On starting my Europa after an idle peiode of two months the fuel pressure went sky high as soon as I switched on the main fuel pump, (10 PSI). When switching on secondary pump the pressure went further up to 15-16 PSi. My engine is a 914, and the pressure had risen increasingly higher (from normal green indication) - up to 6-7 PSi - during the flight test periode. I suspected the fuel pressure sender/instrument to be at fault, but after connecting an auxilliary pressure instrument to the Fuel Pressure Indicator it confirmed the high pressure. So instrument snag is ruled out. I disconnected the fuel return and connected a hose to let return fuel into a can and all indications went back into the green band when switching on the main. On switching both pumps on there was no further pressure increase - which is normal with my in-series system.(The flow into the can was surprisingly high - 20 liters in 7- 8 minutes!) Suspecting a clogged fuel return I blew through the return hose - and we could clearly hear bubbling fuel from the tank opening. Now, this should indicate that the return is functioning ok, or???? But when fitting the fuel return again: same high indications. Now I'm running out of ideas - and to all you wizards out there: Can it be the Fuel Pressure Regulator which is at fault? By the way: The engine starts and run beautifully and there is no dripping or other indications which should indicate override of the float valve of the carburetors. Any one been there?? Ideas greatly appreciated! Cheers Hans, LN-HJD, #334 ________________________________ Message 2 _____________________________________ Time: 06:46:27 AM PST US From: "Brian Davies" Subject: RE: Europa-List: Too high fuel pressure I have a very different setup to yours (Rotax 912S) but I have had indications of high fuel pressure recently with no other adverse sysmptoms. I found I had a high resistance connection to the fuel pressure transmitter. Wiggled the connector (spade type) and the problem went away. Regards Brian Advies _____ From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Hans J. Danielsen Sent: 15 October 2010 11:20 Subject: Europa-List: Too high fuel pressure Hi all, On starting my Europa after an idle peiode of two months the fuel pressure went sky high as soon as I switched on the main fuel pump, (10 PSI). When switching on secondary pump the pressure went further up to 15-16 PSi. My engine is a 914, and the pressure had risen increasingly higher (from normal green indication) - up to 6-7 PSi - during the flight test periode. I suspected the fuel pressure sender/instrument to be at fault, but after connecting an auxilliary pressure instrument to the Fuel Pressure Indicator it confirmed the high pressure. So instrument snag is ruled out. I disconnected the fuel return and connected a hose to let return fuel into a can and all indications went back into the green band when switching on the main. On switching both pumps on there was no further pressure increase - which is normal with my in-series system.(The flow into the can was surprisingly high - 20 liters in 7- 8 minutes!) Suspecting a clogged fuel return I blew through the return hose - and we could clearly hear bubbling fuel from the tank opening. Now, this should indicate that the return is functioning ok, or???? But when fitting the fuel return again: same high indications. Now I'm running out of ideas - and to all you wizards out there: Can it be the Fuel Pressure Regulator which is at fault? By the way: The engine starts and run beautifully and there is no dripping or other indications which should indicate override of the float valve of the carburetors. Any one been there?? Ideas greatly appreciated! Cheers Hans, LN-HJD, #334 ________________________________ Message 3 _____________________________________ Time: 08:16:29 AM PST US From: William Daniell Subject: Europa-List: 912 compression Does anyone know the correct minimum cylinder compression readings for a 912 (80hp)? thanks Will ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.