---------------------------------------------------------- LycomingEngines-List Digest Archive --- Total Messages Posted Tue 06/16/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:13 PM - IO 720 fuel pump and pressure (Philip Guziec) ________________________________ Message 1 _____________________________________ Time: 02:13:40 PM PST US From: Philip Guziec Subject: LycomingEngines-List: IO 720 fuel pump and pressure Cross posted to fish for IO 720 experience. Well, my new bird, which apparently the FAA designates as a SW50,is safely snugged into a heated community hangar at UGN, and I'm eagerly looking forward to transition traning. However, on the delivery flight,teh rightengine (IO 720) showed a fuel pressure of 16 psi when running on the engine driven fuel pump which was recently replaced (for the second time). After the replacement, the fuel pressure tested fine, but on the short flight to UGN it showed 16 vs a 22 to 25 psi targetrange. The boost pump works in the 22-25 range. The pump is adjustable, so the pressure can be raised. However, is this likely the result of a break-in drift in fuel pressure or should I be concerned that the pump will soon fail? I don't recall a fuel pressure drift after the install of a new fuel pump on my IO 360, and I'm assuming this is of a similar design. Thoughts? Phil SW50 M20E Turbo UGN ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message lycomingengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/LycomingEngines-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/lycomingengines-list Browse Digests http://www.matronics.com/digest/lycomingengines-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.