---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 03/19/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:37 PM - Re: Rotax 912 Charging Problem (bnelson79) 2. 06:39 PM - Rotax 912 Battery Discharging Problem (bnelson79) ________________________________ Message 1 _____________________________________ Time: 06:37:49 PM PST US Subject: RotaxEngines-List: Re: Rotax 912 Charging Problem From: "bnelson79" I am having a similar problem to the one Hugh McKay had a few years ago. My problem though is simply that the battery is not being charged. The voltmeter show 12 volts at startup and slowly drains down from there (faster if I turn accessories on). Noticed this while flying yesterday when the voltmeter was pegged on the high end. Landed and suddenly started getting a lot of static in headset. Turned off heater and static disappeared, but voltmeter dropped to zero. Noticed landing light had been accidentally turned on - turned off and volt needle swung to high side again. As I turned switches off the needle would swing from high to low. Finally shut down. But when I tried to restart volt meter read only around 9 volts and engine wouldn't turn over at all. Recharged battery today and engine started with 12 volts showing and none of the other switching problems. But juice continued to dribble away. Any suggestions??? Bad ground??? Bad regulator??? Bill Nelson Prosser, WA N6576E [quote="hgmckay"] > I have a Rotax 912 UL engine on an Allegro 2000 LSA. Recently I have had to replace my battery (12V 18Ah) because of it's inability to crank the engine. Prior to replacing the battery I noticed my combination Volt/Amp meter showed only 12 volts while flying. Usually the voltmeter shows about 13.5 volts at start-up while the engine is running on the ground and while flying. After replacing the battery, and starting the engine the voltmeter returned to 13.5 volts. However, when I began to close certain circuit breakers engaging the front landing light, the two wing tip landing lights, the two wing tip strobes, and the nav. lights I noticed the volt meter dropping back each time I engaged one of the breakers until finally the volt meter again was indicating only about 12 volts just as before. I have a "no charge" red light in the battery charging circuit that comes on if the battery is not being charged while the engine is running. This light normally does not come on unless the engine is at very low rpm ( aprx.1400 rpm). This is not normal for my engine for my idle speed is set at 1800 rpm. > > I do not know why the voltage is dropping each time I close the breaker for lights described above, or what may be causing the voltage drop. I know I have a good battery, but I don't know if my regulator is going bad, or if there may be aground some where, or somthing else. Can anyone shed any light on what may be causing this? The engine has only 255 hours on it and I have not had any other problems with the engine. Any help would be greatly appreciated. > > Hugh G. McKay III > Allegro 2000 > Rotax 912 UL > N661WW > > hgmckay@bellsouth.net (hgmckay@bellsouth.net) > > > [b] Read this topic online here: http://forums.matronics.com/viewtopic.php?p=334470#334470 ________________________________ Message 2 _____________________________________ Time: 06:39:24 PM PST US Subject: RotaxEngines-List: Rotax 912 Battery Discharging Problem From: "bnelson79" I am having a similar problem to the one Hugh McKay had a few years ago. My problem though is simply that the battery is not being charged. The voltmeter show 12 volts at startup and slowly drains down from there (faster if I turn accessories on). Noticed this while flying yesterday when the voltmeter was pegged on the high end. Landed and suddenly started getting a lot of static in headset. Turned off heater and static disappeared, but voltmeter dropped to zero. Noticed landing light had been accidentally turned on - turned off and volt needle swung to high side again. As I turned switches off the needle would swing from high to low. Finally shut down. But when I tried to restart volt meter read only around 9 volts and engine wouldn't turn over at all. Recharged battery today and engine started with 12 volts showing and none of the other switching problems. But juice continued to dribble away. Any suggestions??? Bad ground??? Bad regulator??? Bill Nelson Prosser, WA N6576E [quote="hgmckay"] Quote: I have a Rotax 912 UL engine on an Allegro 2000 LSA. Recently I have had to replace my battery (12V 18Ah) because of it's inability to crank the engine. Prior to replacing the battery I noticed my combination Volt/Amp meter showed only 12 volts while flying. Usually the voltmeter shows about 13.5 volts at start-up while the engine is running on the ground and while flying. After replacing the battery, and starting the engine the voltmeter returned to 13.5 volts. However, when I began to close certain circuit breakers engaging the front landing light, the two wing tip landing lights, the two wing tip strobes, and the nav. lights I noticed the volt meter dropping back each time I engaged one of the breakers until finally the volt meter again was indicating only about 12 volts just as before. I have a "no charge" red light in the battery charging circuit that comes on if the battery is not being charged while the engine is running. This light normally does not come on unless the engine is at very low rpm ( aprx.1400 rpm). This is not normal for my engine for my idle speed is set at 1800 rpm. I do not know why the voltage is dropping each time I close the breaker for lights described above, or what may be causing the voltage drop. I know I have a good battery, but I don't know if my regulator is going bad, or if there may be aground some where, or somthing else. Can anyone shed any light on what may be causing this? The engine has only 255 hours on it and I have not had any other problems with the engine. Any help would be greatly appreciated. Hugh G. McKay III Allegro 2000 Rotax 912 UL N661WW Read this topic online here: http://forums.matronics.com/viewtopic.php?p=334471#334471 ------------------------------------------------------------------------------------- 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.