---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 07/18/14: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:47 AM - Re: Rough Running (Catz631@aol.com) 2. 07:40 AM - Re: Rough Running (Robert Borger) ________________________________ Message 1 _____________________________________ Time: 06:47:52 AM PST US From: Catz631@aol.com Subject: Re: RotaxEngines-List: Rough Running Hugh, I had this happen to me on 2 occasions. The first one occurred when I reversed two of the plug wires when a friend walked into my hanger when I was working on the plane. I got distracted (won't do that again) The second one happened when I put new plugs in the engine as you have. After much checking I finally removed the new plugs and "bomb" checked them in my friends Champion spark plug checker. I found that one of the new plugs would not fire when pressure was applied to it. I chucked that plug in the bin and installed another new plug(after checking it) Problem solved. Dick Maddux 912UL ________________________________ Message 2 _____________________________________ Time: 07:40:57 AM PST US Subject: Re: RotaxEngines-List: Rough Running From: Robert Borger Hugh, OK, let me add my 2 on the subject. Last year at annual condition inspection I replaced the plugs on my 914. Ran like a sewing machine before the annual. Ran rough as a cob after. All the plug wires in the right places. Investigated the ignition module wiring, OK. Played with balancing the carbs. Nothing helped. Pulled the new plugs and inspected them, one at a time. One of the new plugs had a cracked insulator between the center electrode and outer case. You could see it after the run because the crack was stained brown. Replaced that plug and the engine ran much better. Smoothed out beautifully when I went back and rebalanced the carbs. Check all those new plugs. One or more could be bad. If you have the facilities, pressure (or bomb) check them as well. If all your plug wires go to the right place, I bet you have one or two bad plugs. Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop (50 hrs). Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com ------------------------------------------------------------------------------------- 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.