---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Mon 08/03/09: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:53 AM - Re: engine noise on radio (Fred Messinger (fredm)) 2. 10:21 AM - Re: engine noise on radio (Guy Buchanan) 3. 01:27 PM - egt probe, wrong location how bad (Dave G) 4. 02:14 PM - Carb Balance (Rich L) 5. 03:18 PM - Re: Carb Balance (Roger Lee) 6. 03:21 PM - Re: egt probe, wrong location how bad (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 04:53:11 AM PST US Subject: Re: RotaxEngines-List: engine noise on radio From: "Fred Messinger (fredm)" Hi Jack, I had that problem too in my trike for a while. I had placed the output coax of my radio too close to the intercom system. When I moved it 2-3 inches away, the interference stopped. Fred On Sun, Aug 2, 2009 at 6:10 PM, wrote: > Having problems with background noise from 582 engine when transmitting. > Is there a mic that will reduce or eliminate this noise? > > Thanks, Jack > > * > > * > > ________________________________ Message 2 _____________________________________ Time: 10:21:06 AM PST US From: Guy Buchanan Subject: Re: RotaxEngines-List: engine noise on radio At 03:10 PM 8/2/2009, you wrote: >Having problems with background noise from 582 engine when >transmitting. Is there a mic that will reduce or eliminate this noise? If the noise is coming in through the mic, turn down the mic gain and talk loud. It sounds silly but it works really well to raise the signal / noise ratio. It's not my idea but an old trick from open cockpit days. Also you can buy larger foam muffs to go over the mic, however they basically do the same thing - mechanically reducing the mic gain so you have to talk louder. Guy Buchanan San Diego, CA K-IV 1200 / 582-C / Warp / 400 hrs. and counting ________________________________ Message 3 _____________________________________ Time: 01:27:14 PM PST US From: "Dave G" Subject: RotaxEngines-List: egt probe, wrong location how bad My 582 operating for about 300 hours has the EGT probe mounted into the manifold about 1/2" from the exhaust flange. I know this will result in an incorrect reading, but how much will it be off? ________________________________ Message 4 _____________________________________ Time: 02:14:18 PM PST US Subject: RotaxEngines-List: Carb Balance From: "Rich L" I balance my own 912uls so today I tried to do a 914. We followed the same procedure as the 912 but ended up with it being balanced at 1800 and 3700 up to 4500 rpm. We didn't go above 4500 on the ground. There was a difference of 10 or so on the differential gages in between 1800 and 3700 rpm then it evened out. Is there a problem with one or the other carb? Rich Read this topic online here: http://forums.matronics.com/viewtopic.php?p=255855#255855 ________________________________ Message 5 _____________________________________ Time: 03:18:57 PM PST US Subject: RotaxEngines-List: Re: Carb Balance From: "Roger Lee" Hi Rich, The 1800 should be at idle and set with the idle adjustment screw. When you get up to your 3700 then that is adjusted with the bowden cable. They can be different, but you should be able to set the idle and then bring up the throttle and dial that vacuum in, too. When done you should have them on the gages as balanced at idle and at whatever rpm you chose to balance at higher rpms. Sometimes carbs are easy to balance and sometimes they are a PITA. Some times the needles on the gages stay together well and sometimes they lag just a little, but they should settle fairly quickly to be equal. Every carb balance can be a little different. Every 912 engine should have the carbs balanced at 100 hours or the annual which ever comes first. They will always be out of balance just do to wear and tear and a few other factors. This procedure is a must for the health and longevity of the engine. Once you do it a couple of times it gets easier and you will know exactly which carb to adjust over the other to make your work faster. So long as they both balanced your good to go. -------- 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=255869#255869 ________________________________ Message 6 _____________________________________ Time: 03:21:11 PM PST US Subject: RotaxEngines-List: Re: egt probe, wrong location how bad From: "Roger Lee" If it is too close it will read hotter, too far and it will be cooler. Cap or plug the other hole and just re-drill at the proper distance. I don't know if there is a way to tell how many degrees you might be off. Most likely not a lot, but they do have a reason for the correct distance. -------- 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=255870#255870 ------------------------------------------------------------------------------------- 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.