---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 07/12/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:46 AM - Re: Fuel in oil 912ULS (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 06:46:34 AM PST US Subject: RotaxEngines-List: Re: Fuel in oil 912ULS From: "Roger Lee" Hi Peter, Kev and Ira both make good points. I get an oil analysis done at each oil change and never have fuel trace in the oil. I will see if I can't post one of my analysis a little later. Doing an analysis every 100 hrs. or the annual is good. Getting the oil temps up does keep impurities cooked out of the oil. The thermostats only go to 180 degrees. Many people use a 2" strip of aluminum tape to accomplish the same thing over the radiator, but you can tailor it to your needs if you need more temp or less. Shoot for at least 212-220. I do a compression test and carb balance every 100 hrs or annual on my plane and every plane that comes through my shop. Doesn't make any difference what the manual says here for me. It only takes about 20 minutes on a hot engine for a compression test. I do it right after the carb balance because the engine is still hot. Never do a compression check on a cold 912. Test pressure is 87 psi and not 80 like I see test coming from A&P's. Typical test results are 87 test and 83-85 psi differential. The other thing believe it or not that will contribute to this issue is out of sync carbs that never get balanced. (I won't get into the full explanation here) The engine just shakes too much, even if you can't feel it, and causes a host of issues over time. Do this every 100 hrs. or every annual. Carb balance is extremely important for your engine. You should be keeping on top of carb rebuilds too. Waiting 800 hrs. is not good. Between better oil temps, compression test and carb care you will have a good handle on what the engine is doing and have a healthier engine. -------- 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=252638#252638 ------------------------------------------------------------------------------------- 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.