---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 07/30/08: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:15 AM - Re: Wastegate Adjust (h&jeuropa) 2. 06:49 AM - 582 compression (droadrunner@juno.com) 3. 07:28 AM - Re: 582 compression (Noel Loveys) 4. 08:30 AM - Re: 582 compression () 5. 09:56 AM - Re: 582 compression (Robert C Harrison) ________________________________ Message 1 _____________________________________ Time: 05:15:48 AM PST US Subject: RotaxEngines-List: Re: Wastegate Adjust From: "h&jeuropa" A update. I found the wastegate wasn't fully closed when the servo drove it to closed. Adjusted the cable per 12-00-00 and now everything is working correctly. Thanks to all. Jim Butcher Europa N241BW Read this topic online here: http://forums.matronics.com/viewtopic.php?p=195715#195715 ________________________________ Message 2 _____________________________________ Time: 06:49:48 AM PST US Subject: RotaxEngines-List: 582 compression From: droadrunner@juno.com What is a satisfactory compression on a 582? Should it be checked with the engine warm? Should it be checked by pulling the prop through or using the starter to actually spin the prop? Is the compression test a good indicator of the need for an overhaul? Thanks, Marlin ____________________________________________________________ Get educated. Click here for Adult Education programs. http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nNbXz9e4A4vPEoa10zo9AIBgKPFmfu8YIa3bjypkYyLJvRD/ ________________________________ Message 3 _____________________________________ Time: 07:28:48 AM PST US From: "Noel Loveys" Subject: RE: RotaxEngines-List: 582 compression For the reasons you mentioned, irregularities in speed of turning over the prop (crank) and weird things that happen to the seal the rings make to the cylinder read differently with heat. I recommend using a differential pressure meter. Feed it with 80 psi of air and read the differential pressure with the piston being read at TDC. Readings of 70 or better are considered execlent. Used on four stroke engines the Differential meter will also detect and help diagnose bad valves as well as bad rings or cylinders. Two strokes obviously don't have the valve trains so the only thing left is the ring seals. Noel -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of droadrunner@juno.com Sent: Wednesday, July 30, 2008 11:16 AM Subject: RotaxEngines-List: 582 compression What is a satisfactory compression on a 582? Should it be checked with the engine warm? Should it be checked by pulling the prop through or using the starter to actually spin the prop? Is the compression test a good indicator of the need for an overhaul? Thanks, Marlin ____________________________________________________________ Get educated. Click here for Adult Education programs. http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nNbXz9e4A4vPEoa10zo9AIBgK PFmfu8YIa3bjypkYyLJvRD/ ________________________________ Message 4 _____________________________________ Time: 08:30:55 AM PST US Subject: RE: RotaxEngines-List: 582 compression From: Hi Noel "I recommend using a differential > pressure meter. Feed it with 80 psi of air and read the differential > pressure with the piston being read at TDC. Readings of 70 or better are > considered execlent." Just a quick note on differential meters, I know on the 914 Rotax specifies how large the supply orifice needs to be on the differential meter. Lets go extremes for a minute, take a differential meter designed for a diesel with a 3 foot diameter piston and take a compression test on a Model Cox .010cu" with the piston not even in place, you will probably show pretty good compression. If you use a differential meter for a Lyc or a Cont with too large of a supply orifice on a 914 the reading can show 80 over 80 even with a problem. On the other hand if you use too small of a supply orifice for Lyc or Cont, can show low even without a problem. Ron Parigoris ________________________________ Message 5 _____________________________________ Time: 09:56:20 AM PST US From: "Robert C Harrison" Subject: RE: RotaxEngines-List: 582 compression Noel/all If you use a differential compression meter then please ensure someone holds the propeller tight on Top dead centre before you feed the compressed air to the cylinder ....otherwise you could get a severe crack on the head. Better be safe. If you are using this kit on a four stroke engine then get a medical stethoscope, fit a length of small diameter pipe to it to listen up the carb, up the exhaust pipe and lastly down the oil filler on a wet sump engine (this will identify where the gas is escaping and so highlight the likely fault. On the Rotax with the dry sump there's no where to listen for the rings passing gas, but if it's not loosing gas from carb or exhaust then piston rings are all that's left to leak ! Regards Bob Harrison -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Noel Loveys Sent: 30 July 2008 15:26 Subject: RE: RotaxEngines-List: 582 compression For the reasons you mentioned, irregularities in speed of turning over the prop (crank) and weird things that happen to the seal the rings make to the cylinder read differently with heat. I recommend using a differential pressure meter. Feed it with 80 psi of air and read the differential pressure with the piston being read at TDC. Readings of 70 or better are considered execlent. Used on four stroke engines the Differential meter will also detect and help diagnose bad valves as well as bad rings or cylinders. Two strokes obviously don't have the valve trains so the only thing left is the ring seals. Noel -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of droadrunner@juno.com Sent: Wednesday, July 30, 2008 11:16 AM Subject: RotaxEngines-List: 582 compression What is a satisfactory compression on a 582? Should it be checked with the engine warm? Should it be checked by pulling the prop through or using the starter to actually spin the prop? Is the compression test a good indicator of the need for an overhaul? Thanks, Marlin ____________________________________________________________ Get educated. Click here for Adult Education programs. http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nNbXz9e4A4vPEoa10zo9A IBgK PFmfu8YIa3bjypkYyLJvRD/ ------------------------------------------------------------------------------------- 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.