---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 08/30/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:51 AM - Leaking around fuel tank sender unit (William Bliss) ________________________________ Message 1 _____________________________________ Time: 11:51:54 AM PST US From: William Bliss Subject: Europa-List: Leaking around fuel tank sender unit Hello all - advice and experience please I discovered that fuel is leaking from the gauge sender unit which is mounted inside the pilot headrest - an obvious cause of the fuel smell. I was calibrating the fuel gauge. I would like advice on how to reliably seal it. Now all removed (WEMA unit). It was fixed with 5 partially threaded bolts through holes drilled in the GRP tank. The bolts clamp rubbery sealing rings on either side of the tank. The sender unit screws into an aluminium ring outside the tank and is sealed by with an "O" ring. There is a split aluminium ring inside the tank with captive nuts attached (the bolts did not feel as if much thread was actually engaged). Brown sealant had been applied over the whole lot. There is fuel staining on the tank facing surface of the inner rubber ring. The tank material itself feels quite slippery - difficult to sand a good key for sealant bonding. Especially difficult on the inside due to restricted access. There are some raised blebs and grooves to contend with. The only good things to report are that I have ordered more sealant from LAS, the rubbery seals look ok and I havn't dropped anything large into the bottom of the tank yet. William G-WUFF ------------------------------------------------------------------------------------- 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.