---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Sun 08/08/10: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:35 AM - Re: "MAG" Check (James, Clive R) 2. 10:48 AM - Re: "MAG" Check (JohnDRead@AOL.COM) 3. 11:25 AM - Re: "MAG" Check (Jim Crowder) 4. 11:35 AM - Mag Check (BobbyPaulk@comcast.net) 5. 03:48 PM - Re: "MAG" Check (fiveonepw@aol.com) ________________________________ Message 1 _____________________________________ Time: 03:35:02 AM PST US Subject: RE: JabiruEngine-List: "MAG" Check From: "James, Clive R" The Jab engine doesn't drop like a Lycoming when you earth one side. It's more of a sensation than a drop, on an analogue tach it's only a quiver on the needle. Something to do with spark plug positions I imagine. On a big ole gas guzzler they are a lot further apart. The carb heat again doesn't do much on the ground, both tests show a little more clearly in the air. I usually use 1800 as well to answer your question. Regards, Clive -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Ivan Sent: 08 August 2010 05:19 Subject: Re: JabiruEngine-List: "MAG" Check The Jab engine manual has all these operating limitation parameters. I do my mag check at about 2000RPM and the drop parameters I think are less than 100RPM drop and less than 100 from side to side. This is from memory but I know the manual states these figures. I have these figures printed in my engine run up checklist. I never get a carb heat drop unless there is some icing in the carburetor. Not exactly sure why but I think it has something to do with the Bing being set up as "altitude compensating." Ivan Phoenix, AZ ----- Original Message ----- From: "MHerder" Sent: Saturday, August 07, 2010 8:28 PM Subject: JabiruEngine-List: "MAG" Check > > > What RPM are you doing your "Mag" Check at? What's a normal drop? I was > trying 1800 RPM and am not getting a noticable drop, also not getting a > noticeable drop when I kick in the carb heat? > > Engine has about .9 hr of ground run time on it and we're still working > out some kinks. > > I guess we call a "mag" check a coil or orgnition check on a Jab? > > I'm using the Grand Rapids EIS and noticed that there are two sensitivity > settings on the tach, but I want to get some go no go parameters from some > folks. > > Thanks > > -------- > One Rivet at a Time! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=307893#307893 > > > ________________________________ Message 2 _____________________________________ Time: 10:48:12 AM PST US From: JohnDRead@AOL.COM Subject: Re: JabiruEngine-List: "MAG" Check Hi Guys; I recall from the Jabiru installation instructions the carb heat is always on so there should not be any RPM drop. do not archive Regards, John CH701 - Colorado - Jabiru 3300 Cell: 719-494-4567 Home: 303-648-3261 In a message dated 8/7/2010 10:19:51 P.M. Mountain Daylight Time, imap8ntr@cox.net writes: --> JabiruEngine-List message posted by: "Ivan" The Jab engine manual has all these operating limitation parameters. I do my mag check at about 2000RPM and the drop parameters I think are less than 100RPM drop and less than 100 from side to side. This is from memory but I know the manual states these figures. I have these figures printed in my engine run up checklist. I never get a carb heat drop unless there is some icing in the carburetor. Not exactly sure why but I think it has something to do with the Bing being set up as "altitude compensating." Ivan Phoenix, AZ ----- Original Message ----- From: "MHerder" Sent: Saturday, August 07, 2010 8:28 PM Subject: JabiruEngine-List: "MAG" Check > --> JabiruEngine-List message posted by: "MHerder" > > > What RPM are you doing your "Mag" Check at? What's a normal drop? I was > trying 1800 RPM and am not getting a noticable drop, also not getting a > noticeable drop when I kick in the carb heat? > > Engine has about .9 hr of ground run time on it and we're still working > out some kinks. > > I guess we call a "mag" check a coil or orgnition check on a Jab? > > I'm using the Grand Rapids EIS and noticed that there are two sensitivity > settings on the tach, but I want to get some go no go parameters from some > folks. > > Thanks > > -------- > One Rivet at a Time! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=307893#307893 > > > ________________________________ Message 3 _____________________________________ Time: 11:25:36 AM PST US From: "Jim Crowder" Subject: RE: JabiruEngine-List: "MAG" Check Not on mine. I am finishing my 3300 install and my air box has a diverter flap controlled by a push/pull cable I have installed. Jim Crowder Installing a 3300 in a Kitfox 5 Northern Colorado From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of JohnDRead@aol.com Sent: Sunday, August 08, 2010 10:47 AM Subject: Re: JabiruEngine-List: "MAG" Check Hi Guys; I recall from the Jabiru installation instructions the carb heat is always on so there should not be any RPM drop. do not archive Regards, John CH701 - Colorado - Jabiru 3300 Cell: 719-494-4567 Home: 303-648-3261 In a message dated 8/7/2010 10:19:51 P.M. Mountain Daylight Time, imap8ntr@cox.net writes: The Jab engine manual has all these operating limitation parameters. I do my mag check at about 2000RPM and the drop parameters I think are less than 100RPM drop and less than 100 from side to side. This is from memory but I know the manual states these figures. I have these figures printed in my engine run up checklist. I never get a carb heat drop unless there is some icing in the carburetor. Not exactly sure why but I think it has something to do with the Bing being set up as "altitude compensating." Ivan Phoenix, AZ ----- Original Message ----- From: "MHerder" Sent: Saturday, August 07, 2010 8:28 PM Subject: JabiruEngine-List: "MAG" Check > > > What RPM are you doing your "Mag" Check at? What's a normal drop? I was > trying 1800 RPM and am not getting a noticable drop, also not getting a > noticeable drop when I kick in the carb heat? > > Engine has about .9 hr of ground run time on it and we're still working > out some kinks. > > I guess we call a "mag" check a coil or orgnition check on a Jab? > > I'm using the Grand Rapids EIS and noticed that there are two sensitivity > settings on the tach, but I want to get some go no go parameters from some > folks. > > Thanks > > -------- > One Rivet at a Time! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=307893#307893 > > > ========================= Use utilities Day ================================================ - MATRONICS WEB FORUMS ================================================ - List Contribution Web Site sp; ================================================== ________________________________ Message 4 _____________________________________ Time: 11:35:22 AM PST US From: BobbyPaulk@comcast.net Subject: JabiruEngine-List: Mag Check Michael, I get 20 to 30 rpm drop on each side. ( 3300 ) This is after break-in ( 96 hrs ). The first few hours my mag drop was inconsistent due to rings not seated and uneven oil consumption. Still not close to a hundred except when mixture was VERY rich and plugs sooted up. My first 15~45 hrs was spent trying to get mixture and cooling problems solved. Now if I get more than a 40 rpm drop it is usually a plug and will clear up after a good flight. Bobby Jacksonville, Fl. ________________________________ Message 5 _____________________________________ Time: 03:48:44 PM PST US Subject: RE: JabiruEngine-List: "MAG" Check From: fiveonepw@aol.com Try your mag check at different, typically lower, rpms- 1100-1300 range wi ll normally result in 10-30 rpm drop.? Try it at idle or in cruise flight and it's pretty obvious as well.? You should also be able to hear a chang e in engine sound even if no evidence showing on tach... ? Possum -----Original Message----- From: Jim Crowder <jcrowder@lpbroadband.net> Sent: Sun, Aug 8, 2010 2:25 pm Subject: RE: JabiruEngine-List: "MAG" Check Not on mine.? I am finishing my 3300 install and my air box has a diverter flap controlled by a push/pull cable I have installed. Jim Crowder ? Installing a 3300 in a Kitfox 5 Northern Colorado ? From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabirueng ine-list-server@matronics.com] On Behalf Of JohnDRead@aol.com Sent: Sunday, August 08, 2010 10:47 AM Subject: Re: JabiruEngine-List: "MAG" Check ? Hi Guys; ????????????I recall from the Jabiru installation instructions the carb he at is always on so there should not be any RPM drop. ? do not archive ? Regards, John CH701 - Colorado - Jabiru 3300 Cell: 719-494-4567 Home: 303-648-3261 ? In a message dated 8/7/2010 10:19:51 P.M. Mountain Daylight Time, imap8ntr @cox.net writes: --> JabiruEngine-List message posted by: "Ivan" <imap8ntr@cox.net> ; The Jab engine manual has all these operating limitation parameters.?? I do my mag check at about 2000RPM and the drop parameters I think are less tha n 100RPM drop and less than 100 from side to side.? This is from memory but I know the manual states these figures.? I have these figures printed in my engine run up checklist.? I never get a carb heat drop unless there is som e icing in the carburetor.? Not exactly sure why but I think it has somethin g to do with the Bing being set up as "altitude compensating." Ivan Phoenix, AZ ----- Original Message ----- From: "MHerder" <michaelherder@beckgroup.com> Sent: Saturday, August 07, 2010 8:28 PM Subject: JabiruEngine-List: "MAG" Check > --> JabiruEngine-List message posted by: "MHerder" > <michaelherder@beckgroup.com> > > What RPM are you doing your "Mag" Check at?? What's a normal drop?? I was > trying 1800 RPM and am not getting a noticable drop, also not getting a > noticeable drop when I kick in the carb heat? > > Engine has about .9 hr of ground run time on it and we're still worki ng > out some kinks. > > I guess we call a "mag" check a? coil or orgnition check on a Jab? > > I'm using the Grand Rapids EIS and noticed that there are two sensiti vity > settings on the tach, but I want to get some go no go parameters from some > folks. > > Thanks > > -------- > One Rivet at a Time! > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=307893#307893 > > > > > > > > > > Use utilities Day ================= ====== ? ? ? ? ? ?? - MATRONICS WEB FORUMS ====== ================= ? ? ? ? ?? - List Cont ribution Web Site sp; ? ? ? ? ? ? ? ? ? ? ? ? ??http://www.matronics.com/Navigator?JabiruEngine-Listhttp://forums.matron ics.comhttp://www.matronics.com/contribution? ======================== ======================== ======================== ======================== ======================== =================== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.