---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 11/13/08: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:52 AM - Re: Rough starting 912uls (K Dilks) 2. 06:43 AM - Re: Rough starting 912uls (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 04:52:48 AM PST US Subject: RotaxEngines-List: Re: Rough starting 912uls From: "K Dilks" Rough starting is usually started by too high idle setting or having the throttle open a little like on a Contilyco. if engine has suffered for sometime the dog and spring tension must be check ed along with the slipper clutch torque. If no slipper clutch is fitted remove the prop shaft and check the splines for where. The play by having worn splines makes the prop "bounce " of the power then compression strokes. If engine starts like this accelerate through it quickly , or if not possible stop engine and retry with the throttles fully closed. On the 912s best to have the idle set at 1650 rpm hot and use the choke just to get it to catch then open up and off with the choke. Happy landings Kev -------- Austria ............. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=213902#213902 ________________________________ Message 2 _____________________________________ Time: 06:43:01 AM PST US Subject: RotaxEngines-List: Re: Rough starting 912uls From: "Roger Lee" Hi Rick, Several of the people here have good advice. There are a few more things to think about after you have tried and made sure your choke and throttle combination is correct on start up. This could be a carb issue and could be caused by 3-4 different items with the carbs or a gearbox issue. How many hours on the carbs since new or when were they rebuilt? The carbs can be synced even if you have problems and still run like garbage when under higher throttle settings or at start up. Carb fuel and air leaks can cause some of these issues. Do you happen to know how old the engine is? What are the plugs gapped at? Not a big issue, but a contributing one and should be checked just so it doesn't add to your headache. Another big one that some of the guys have talked about is getting your gearbox inspected. How many hours are on the engine? Please let us know when you get it nailed down so we all can learn. Good Luck -------- 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=213915#213915 ------------------------------------------------------------------------------------- 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.