---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 10/11/17: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:15 AM - Re: CJ cough/miss fire/hesitation in flight (Harv) 2. 01:49 AM - Re: Re: CJ cough/miss fire/hesitation in flight (Nigel Willson) 3. 02:49 AM - Engine missing (Richard Goode) 4. 06:29 AM - Re: Coils (Jill Gernetzke) 5. 06:29 AM - Re: Coils (Jill Gernetzke) 6. 11:18 AM - Re: Engine missing (jay-dub) 7. 06:52 PM - Re: Re: Engine missing (cjpilot710@aol.com) ________________________________ Message 1 _____________________________________ Time: 01:15:25 AM PST US Subject: Yak-List: Re: CJ cough/miss fire/hesitation in flight From: "Harv" Thanks for the replies. This is a Housai and we are fresh out of annual, points are cleaned and gapped, timing set, compressions all good, one new cigar cartridge. I've had this once before and don't associate it to above works (this is why I think it could be a mag coil) but will check through the items raised. It's not a particularly nice feeling when it skips for that heart beat but maybe I'll have to fly her again to pinpoint which mag is giving out. I'll try an increase temp run up first and see if she'll misbehave on the ground (that would be nice) Will update with findings. Cheers Harv Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473458#473458 ________________________________ Message 2 _____________________________________ Time: 01:49:55 AM PST US From: "Nigel Willson" Subject: RE: Yak-List: Re: CJ cough/miss fire/hesitation in flight It's not worth bothering trying to figure out which mag. Also beware of "old" new spares. The coils deteriorate on the shelf as well as "in life". I replaced mine with brand new in all respects from M14P. Regards, Nigel Willson Flying Instructor & Examiner | Airshow Organiser | Display Pilot Mobile: +44 (0)7809 116676 Email: nigel.willson@yakdisplay.com Web: http://easyppl.com http://greatbritishairshows.com http://yakdisplay.com -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Harv Sent: 11 October 2017 09:15 Subject: Yak-List: Re: CJ cough/miss fire/hesitation in flight Thanks for the replies. This is a Housai and we are fresh out of annual, points are cleaned and gapped, timing set, compressions all good, one new cigar cartridge. I've had this once before and don't associate it to above works (this is why I think it could be a mag coil) but will check through the items raised. It's not a particularly nice feeling when it skips for that heart beat but maybe I'll have to fly her again to pinpoint which mag is giving out. I'll try an increase temp run up first and see if she'll misbehave on the ground (that would be nice) Will update with findings. Cheers Harv Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473458#473458 ________________________________ Message 3 _____________________________________ Time: 02:49:24 AM PST US From: "Richard Goode" Subject: Yak-List: Engine missing We have probably encountered this problem some 30 times over the years, and although sometimes there are other magneto faults, it is absolutely characteristic of a coil failing that the engine is fine when cold and during climb out, and then starts missing between 20 and 30 minutes of flight, at which stage the engine has warmed up and the heat has soaked through to the magneto. Initially it begins with a short "stumble", but will get worse and worse over a few hours until the engine can stop for several seconds which does get your attention. Also, as people have noted, the engine does not run normally on the other magneto. The new coil is the only solution! Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com ________________________________ Message 4 _____________________________________ Time: 06:29:57 AM PST US From: "Jill Gernetzke" Subject: Yak-List: RE: Coils Group, I have wide and narrow slot coils in stock. Contact me offlist. Jill M-14P, Inc. 4905 Flightline Drive Kingman, AZ 86401 928-681-4400 www.m-14p.com ________________________________ Message 5 _____________________________________ Time: 06:29:57 AM PST US From: "Jill Gernetzke" Subject: Yak-List: RE: Coils Group, I have wide and narrow slot coils in stock. Contact me offlist. Jill M-14P, Inc. 4905 Flightline Drive Kingman, AZ 86401 928-681-4400 www.m-14p.com ________________________________ Message 6 _____________________________________ Time: 11:18:41 AM PST US Subject: Yak-List: Re: Engine missing From: "jay-dub" I had this very thing whilst delivering a Yak-52 in the UK. Needless to say, a swift 180 followed with a return to the engineers. I was about to start the drills when it recovered so I left the levers alone and did a forced landing pattern back onto the field. It went a second time on the way back. -------- CJ and Yak-52 owner Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473472#473472 ________________________________ Message 7 _____________________________________ Time: 06:52:36 PM PST US From: cjpilot710@aol.com Subject: Re: Yak-List: Re: Engine missing I had the same problem with the M-14p in my CJ. Maybe a precautionary landing in Americas, GA. on my way to OSH, a good number of years ago. Up to that point I had been chasing ignition problems, mags, coils, plugs, timing etc etc. A crop duster's mechanic pen pointed the problem also instantly. Ignition harness brake down. I had Dennis ship me an auto conversion over night. I spent that afternoon removing the old harness (4 hours). When the new one from Dennis arrived, It took me 4 hours to put it on, and I continued on to OSH that afternoon. I've had very few problems since - NONE involving the harness. Jim "Pappy" Goolsby In a message dated 10/11/2017 2:19:11 P.M. Eastern Daylight Time, flyjnw@gmail.com writes: --> Yak-List message posted by: "jay-dub" I had this very thing whilst delivering a Yak-52 in the UK. Needless to say, a swift 180 followed with a return to the engineers. I was about to start the drills when it recovered so I left the levers alone and did a forced landing pattern back onto the field. It went a second time on the way back. -------- CJ and Yak-52 owner Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473472#473472 ------------------------------------------------------------------------------------- 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.