---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 10/29/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:38 AM - Re: Rough starting 912uls (rampil) 2. 12:25 PM - Re: Re: Rough starting 912uls (Dave Austin) 3. 12:43 PM - Re: Re: Rough starting 912uls (Pete Christensen) 4. 01:07 PM - Re: Re: Rough starting 912uls () ________________________________ Message 1 _____________________________________ Time: 11:38:46 AM PST US Subject: RotaxEngines-List: Re: Rough starting 912uls From: "rampil" Rotax 9 series engines are designed to work with their intrinsic mechanical fuel pump and an electric boost pump. The factory does not provide guidance on priming pumps. That generally means they are unnecessary or not condoned. -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=211008#211008 ________________________________ Message 2 _____________________________________ Time: 12:25:13 PM PST US From: "Dave Austin" Subject: Re: RotaxEngines-List: Re: Rough starting 912uls I'm puzzled.. Why would you need a primer when you have a choke? Mine will start rough if the throttle is open at all, which negates the choke action. Make sure the throttle butterfly is fully to the idle position (against the idle adjustment screws). Or is the idle too high? Dave Austin 601HDS - 912 ________________________________ Message 3 _____________________________________ Time: 12:43:08 PM PST US From: "Pete Christensen" Subject: Re: RotaxEngines-List: Re: Rough starting 912uls I have both and I use both. Works fine for me. Pete Kitfox III Hell Paso, TX ----- Original Message ----- From: "Dave Austin" Sent: Wednesday, October 29, 2008 1:24 PM Subject: Re: RotaxEngines-List: Re: Rough starting 912uls > > > I'm puzzled.. > Why would you need a primer when you have a choke? > Mine will start rough if the throttle is open at all, which negates the > choke action. Make sure the throttle butterfly is fully to the idle > position (against the idle adjustment screws). Or is the idle too high? > > Dave Austin 601HDS - 912 > > > ________________________________ Message 4 _____________________________________ Time: 01:07:32 PM PST US Subject: Re: RotaxEngines-List: Re: Rough starting 912uls From: Just a note on Bing type 64 constant depression carb it uses a enriching circuit. It needs to be at or close to idle to function. On my 1988 BMW R100GS that uses that carb the first thing to clog is the enriching circuit. If can't get it started when cold out and don't feel like taking apart the carbs, can blow into the overflow line and essentially shoot raw fuel into the venturi. Works great. Vent location on a 912 or 912S is critical that it is near ambient pressure. on a 914 it must be plumbed without leaks to the enriching solenoid output. Also too there is a mod to make enriching circuit more rich for cold weather operations. All that said, you could fashion a blow into carb float bowl to shoot raw fuel into venturi. Have fire extinguisher at hand! Ron P. ------------------------------------------------------------------------------------- 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.