---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 08/05/14: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:54 AM - Re: Low RPM on Takeoff??? (kerrimikehickman) ________________________________ Message 1 _____________________________________ Time: 08:54:49 AM PST US Subject: Re: RotaxEngines-List: Low RPM on Takeoff??? From: kerrimikehickman I had that exact problem w/912ULS...=0A=0A=0A-Findings: very small hairline crack/approx. 2mm long in very small indentation (or igin unknown) in top of one carb housing...=0A(discovered after sending carbs to LEAF for routine ultrasonic cleaning/rubber rep lacement).=0A=0A=0A--Result: replacement of carb top housing led t o normal engine operation at all power settings.=0ACheers=0AMike=0A =0A=0A-----Original Message-----=0AFrom: tmitton =0AT o: rotaxengines-list =0ASent: Mon, Aug 4, 2014 6:12 pm=0ASubject: RotaxEngines-List: Low RPM on Takeoff ton99@gmail.com>=0A=0ARecently my 912ULS engine started only going to 5000rpm on takeoff with full =0Athrottle.=0A=0APreviously it always went directly to 5500rpm or so upon application of fu ll =0Apower. Now it only goes above 5000rpm once it has be en flying for a few minutes. =0AOnce flying it will still go to 5500+ even in a climb so it isn't like it is =0A just the climbing load on take off that is holding it back . =0A=0ANo changes have been made to the engine so I don't know what would cause the RPM =0Adrop. It is enough that takes offs now need 1000+ feet where as before 500-600ft =0A was enough. There is definitely a noticeable difference. =0A=0AI have checked the carburetor linkages - full throw to the stops there. Drained =0Athe gas in case it was old and rep laced it with fresh new gas - no change. Tried =0Ait with half a tank of 100LL to give it an octane boost - no c hange. Checked the =0Aspark plugs - still clean after only 2 5hrs of use. Nothing stuck on the rads. =0AOil topped up.=0A =0ASo - any idea as to what might cause the drop in rpm? =0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics =========================== =========================== =========================== = - MATRONICS WEB FORUMS - =========================== =========================== =========================== ===============0A=0A=0A=0A=0A =0A=0A ------------------------------------------------------------------------------------- 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.