---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 03/30/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:27 PM - Dieseling 912 UL Engine (Hugh McKay) ________________________________ Message 1 _____________________________________ Time: 03:27:45 PM PST US From: "Hugh McKay" Subject: RotaxEngines-List: Dieseling 912 UL Engine I know this subject has been commented on before, but here is my situation. My 912 UL has 504 hours and has begun to diesel on shutdown. I have never had this problem since I have had the engine. Bought it new in 2007. It starts fine, runs fine and idles fine. Shut down is at 1800 rpm. It just does not want to stop rotation. It does not rotate backwards, it just seems to want to continue to run after I kill both ignition circuits. I have checked and changed the plugs without any change. However, I have noticed that when I do a =9Cmag check=9D at 4000 rpm I only see a very slight drop, (< 100 rpm) if any on the tac. I used to see 100 to 150 rpm drop. Could I have a =9CHot=9D circuit and not know it? How can I check the ignition circuits? I am going to change fuel also and see if that may be the problem. The temperature here in NC is now in the 80s (degrees F), and I am running 87 MOGAS (with 10 % ethanol) currently, but will switch to 93 MOGAS (no ethanol) to see if that makes a difference. Has anyone else experienced this? Dick Maddux, I know you had a problem some what like this, but don=99t remember what solved your issue. Hugh G. McKay III, P.E. Allegro 2000 Rotax 912 UL ------------------------------------------------------------------------------------- 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.