---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Sat 11/15/08: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:33 AM - Fuel leak at the Main Tank Drain () 2. 08:06 PM - Re: Fuel leak at the Main Tank Drain (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 07:33:08 AM PST US From: Subject: Allegro-List: Fuel leak at the Main Tank Drain The other day I drained the main fuel tank on my Allegro 2000 in order to remove and clean the gascolator which is between the electric fuel pump and the engine. The drain consists of two items, the first being a small threaded brass plug with a point which is removed with a flat head screwdriver. This brass plug screws into a separate larger female/male brass fitting which in turn screws into the bottom of the tank itself. The male part of the larger fitting that screws into the tank has a metal washer which compresses on to the bottom of the tank for the seal. I initially removed the smaller pointed brass plug, but the draining was so slow that I then removed the larger brass fitting with the metal washer. The fuel quickly drained after removing the larger fitting. The reason that the fuel was draining so slow through the smaller opening was that some debris had partially clogged the outlet. After draining the tank and removing and cleaning the gascolator filter, I reassembled everything and partially filled the main tank and ran the engine for a short time. After shutting down the engine I checked for any fuel leaks at the gascolator and the main tank drain. I found that the main tank drain had a slow drip leak. I have checked the fuel at the drain point many times by loosening the small brass plug which has a point on it, and retightening it afterwards with no fuel leaking, so I am sure the leak is not at that point. I am convinced the fuel leak is from the larger fitting (that has the metal seal washer) that screws into the bottom of the tank itself. The slow leak is either coming through the flat contact surface between the top of the metal seal washer and the tank itself, or between the flat bottom of the metal seal washer and the fitting itself. I have tightened this fitting as much as I feel it is safe to do so. Does anyone have any suggestions on how to stop this slow drip leak? Hugh McKay Allegro 2000 Rotax 912 UL ________________________________ Message 2 _____________________________________ Time: 08:06:26 PM PST US Subject: Allegro-List: Re: Fuel leak at the Main Tank Drain From: "Roger Lee" Hi Hugh, Use a little Loctite 574 on both sides of the washer. Use very little . The leak will stop. This is good for oil leaks between metal surfaces, gaskets or "O" rings that just won't seal. You don't need a lot. I use it on the Rotax 912 valve covers when you can't get them to stop oozing oil even when a new "O" ring is installed. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Service Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=214432#214432 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message allegro-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Allegro-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/allegro-list Browse Digests http://www.matronics.com/digest/allegro-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.