---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 12/10/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:36 AM - Re: EGT () 2. 08:15 AM - Re: EGT (Brian Lloyd) 3. 11:48 AM - Christmas Mags?? (Cpayne) ________________________________ Message 1 _____________________________________ Time: 12:36:41 AM PST US From: Subject: RE: Yak-List: EGT I would disagree with useless. You cant use a laser temp gauge in the air. I had a "slight" engine roughness in the air, but not on the ground. It would only happen at altitudes greater than 4k. Turned out to be the wires to two cylinders going bad. But I knew which ones, due to the EGT. I've had bad plug issues in the past, prior to the EGT that took a number of attempts to fix from good mechanics (not me). Each recommended the EGT probes as the fastest way to know which cyl was giving us the problems. YMMV Bear From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Genzlinger, Reade Sent: Thursday, December 08, 2011 10:55 PM Subject: RE: Yak-List: EGT A rough running engine will tell you all that too! A simple check with a laser pyrometer ($80) will tell you which cylinder is cold on mag and plug issues. Primer and intake is easily identified by rough idle and visual cockpit check. If you don't have a way to lean the 9 probe egt is pretty useless. Reade Genzlinger Cairnwood Cooperative Corp. 215.914.0370 From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of dabear@devere.us Sent: Thursday, December 08, 2011 10:40 PM Subject: RE: Yak-List: EGT So, yes, having the EGT readings can help if you have a bad plug or wire. It can also tell you when you left the primer cocked over/open and it can tell you when you left the intake drain open. It immediately tells you when you have a Cyl problem. I think it is worth the installation as it saves time/cost in troubleshooting problems. Bear ________________________________ Message 2 _____________________________________ Time: 08:15:32 AM PST US Subject: Re: Yak-List: EGT From: Brian Lloyd On Sat, Dec 10, 2011 at 12:33 AM, wrote: > I would disagree with useless. > A single-point EGT is useless. The only exception to that is a TIT but then you are measuring something else. You cant use a laser temp gauge in the air=85 I had a =93slight=94 engine > roughness in the air, but not on the ground. It would only happen at > altitudes greater than 4k. Turned out to be the wires to two cylinders > going bad. But I knew which ones, due to the EGT. **** > > I=92ve had bad plug issues in the past, prior to the EGT that took a numb er > of attempts to fix from good mechanics (not me). Each recommended the EG T > probes as the fastest way to know which cyl was giving us the problems. > Yes, a probe-per-cylinder EGT is useful. But without a mixture control, it is substantially less useful. Sure it helped you in that case but you have to weigh the cost of troubleshooting the plug wires without EGT with the cost of the EGT. Of course your mechanic recommended it. There was no incremental cost to him. And then there is the point of knowing that your plug wires are more than 5 years old and should be replaced anyway. Plug wires and hoses. You know, one of the best ways to ensure that your airplane doesn't have problems while flying is to be aggressive on prophylactic maintenance. That substantially mitigates the need for diagnostic instrumentation. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 brian@lloyd.com +1.767.617.1365 (Dominica) +1.916.877.5067 (USA) ________________________________ Message 3 _____________________________________ Time: 11:48:09 AM PST US From: Cpayne Subject: Yak-List: Christmas Mags?? Yes, you too could put a pair of Mags under the tree for your "baby". Just finished going through a pair of M9F (M-14P) mags that I had taken off some time ago. They ran good after some maintenance. I'll probably do an article using pics I took while going through them since I went beyond what the Task cards spell out. 658TT, 462 factory SMOH and 0 since maintenance. Rotors included but no distributor caps or couplers since I'm still using them. Best reasonable offer takes 'em. Craig Payne ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-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/yak-list Browse Digests http://www.matronics.com/digest/yak-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.