---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sat 02/14/09: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:44 AM - Re: Carb Calibration (Catz631@aol.com) 2. 07:52 AM - carb sync (Lynn Vandevort) 3. 08:19 AM - Re: carb sync (LarryMcFarland) 4. 10:34 AM - Re: Carb Calibration (Noel Loveys) 5. 12:04 PM - Re: carb sync (Noel Loveys) 6. 12:11 PM - Re: carb sync (Noel Loveys) 7. 05:09 PM - Re: carb sync (rampil) 8. 05:11 PM - Re: carb sync (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 05:44:17 AM PST US From: Catz631@aol.com Subject: Re: RotaxEngines-List: Carb Calibration I am in total agreement with an in panel gauge. Maybe you could come up with some sort of valve in the cross tube(of course it would probably leak air). I have a knob on the back of one of my throttle cables and can make micro adjustments on the carb sync without ever getting out of the aircraft.It does a great job of syncing one carb to the other. But alas, I have to have the gauge(I use a Twin Max) to get it "on the money" Maybe someone will invent something. Dick Maddux Kitfox 4 Rotax 912UL Pensacola,Fl **************Nothing says I love you like flowers! Find a florist near you now. (http://yellowpages.aol.com/search?query=florist&ncid=emlcntusyelp00000002) ________________________________ Message 2 _____________________________________ Time: 07:52:23 AM PST US From: "Lynn Vandevort" Subject: RotaxEngines-List: carb sync Am I the only guy who is afraid to stand 2 feet from a spinning prop and sync the carbs. I run the gauge into the cockpit, read the differential, shut off the engine and make an adjustment then start the engine and repeat until I have them synced. I can't bring myself to work on the carbs while the prop is spinning. I have a Highlander with a 914 soon to be on Czech amphibious floats. Thanks, Lynn ________________________________ Message 3 _____________________________________ Time: 08:19:43 AM PST US From: LarryMcFarland Subject: Re: RotaxEngines-List: carb sync Lynn, You might inquire if the prop can be removed. My Subaru will run without a prop with no consequence. I prefer to adjust carbs, ignition and such without the prop on. For the extra 30-minutes it takes to remove the prop there is real added safety. Larry McFarland 601HDS at www.macsmachine.com Lynn Vandevort wrote: > Am I the only guy who is afraid to stand 2 feet from a spinning prop > and sync the carbs. I run the gauge into the cockpit, read the > differential, shut off the engine and make an adjustment then start > the engine and repeat until I have them synced. > > I can't bring myself to work on the carbs while the prop is spinning. > > I have a Highlander with a 914 soon to be on Czech amphibious floats. > > Thanks, > Lynn > * > > * ________________________________ Message 4 _____________________________________ Time: 10:34:27 AM PST US From: "Noel Loveys" Subject: RE: RotaxEngines-List: Carb Calibration You would have to also install a centre valve in the cross tube to be able to shut down the cross flow make a reading. As for leaks not properly installed. My beef would be more weight. Noel From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Catz631@aol.com Sent: Saturday, February 14, 2009 10:09 AM Subject: Re: RotaxEngines-List: Carb Calibration I am in total agreement with an in panel gauge. Maybe you could come up with some sort of valve in the cross tube(of course it would probably leak air). I have a knob on the back of one of my throttle cables and can make micro adjustments on the carb sync without ever getting out of the aircraft.It does a great job of syncing one carb to the other. But alas, I have to have the gauge(I use a Twin Max) to get it "on the money" Maybe someone will invent something. Dick Maddux Kitfox 4 Rotax 912UL Pensacola,Fl _____ Nothing says I love you like flowers! Find a florist near you now. ________________________________ Message 5 _____________________________________ Time: 12:04:40 PM PST US From: "Noel Loveys" Subject: RE: RotaxEngines-List: carb sync I certainly wouldn't like to stand That close in front of the prop but standing behind it has never bothered me. I'm always aware it is there and for that reason I always have one hand on the A frame of the cockpit or a cowl support just to feel more at ease. I find it also helps to have the wind from the prop blowing me away from it than pulling me into it. Just one of the reasons that I don't like the idea of propping an engine from the front. If you feel safer jumping into the cabin to take the readings then do it that way. Better to be safe and alive than ... I've worked around helicopters a bit and I don't mind ducking under the tail boom to go from the left to the right but I give that tail rotor a lot of respect and lea-way. Noel From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Lynn Vandevort Sent: Saturday, February 14, 2009 12:14 PM Subject: RotaxEngines-List: carb sync Am I the only guy who is afraid to stand 2 feet from a spinning prop and sync the carbs. I run the gauge into the cockpit, read the differential, shut off the engine and make an adjustment then start the engine and repeat until I have them synced. I can't bring myself to work on the carbs while the prop is spinning. I have a Highlander with a 914 soon to be on Czech amphibious floats. Thanks, Lynn ________________________________ Message 6 _____________________________________ Time: 12:11:57 PM PST US From: "Noel Loveys" Subject: RE: RotaxEngines-List: carb sync The Subaru is gear driven the Jabiru is direct drive. That can make all the difference. The good old Lyc. And Conti engines use the prop as part of the flywheel and they can be real buggers to get running without the prop or a test paddle. Idling without the prop on those engines is just not going to happen. The old Bell 47-G which used a "conventional engine", mounted vertically, without a fly wheel had to "idle" just below cruise throttle settings ( 200 comes to mind but it may have been higher. Getting one of those things to start in cold weather was ... let's say fun. Getting the rotor clutches engaged without stalling the engine was another ball game altogether. The colder it got the harder it got. Hard to believe they used those things through the winter in Korea. Noel -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of LarryMcFarland Sent: Saturday, February 14, 2009 12:49 PM Subject: Re: RotaxEngines-List: carb sync Lynn, You might inquire if the prop can be removed. My Subaru will run without a prop with no consequence. I prefer to adjust carbs, ignition and such without the prop on. For the extra 30-minutes it takes to remove the prop there is real added safety. Larry McFarland 601HDS at www.macsmachine.com Lynn Vandevort wrote: > Am I the only guy who is afraid to stand 2 feet from a spinning prop > and sync the carbs. I run the gauge into the cockpit, read the > differential, shut off the engine and make an adjustment then start > the engine and repeat until I have them synced. > > I can't bring myself to work on the carbs while the prop is spinning. > > I have a Highlander with a 914 soon to be on Czech amphibious floats. > > Thanks, > Lynn > * > > * ________________________________ Message 7 _____________________________________ Time: 05:09:47 PM PST US Subject: RotaxEngines-List: Re: carb sync From: "rampil" Larry, Without a load on the crankshaft, a rotax 9xx will overspeed easily and destroy its pistons and valves. Not Recommended! Refer to page 12 of the 912 Install Manual May 1 2007 version -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=230281#230281 ________________________________ Message 8 _____________________________________ Time: 05:11:42 PM PST US Subject: RotaxEngines-List: Re: carb sync From: "Roger Lee" Do not run a Rotax 912 series engine without the prop. -------- 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=230282#230282 ------------------------------------------------------------------------------------- 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.