---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 10/07/12: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:20 AM - CJ6 prop reversal (Okanogan Lew) 2. 07:46 AM - Re: Hose replacement Yak 52 (George Coy) 3. 08:13 AM - Re: CJ6 prop reversal (Paul Lewis) 4. 11:11 AM - Re: CJ6 prop reversal (Walter Lannon) 5. 11:32 AM - Re: CJ6 prop reversal (Walter Lannon) 6. 04:12 PM - Re: CJ6 prop reversal (Paul Lewis) 7. 10:00 PM - Re: CJ6 prop reversal (Gary Gabbard) ________________________________ Message 1 _____________________________________ Time: 07:20:30 AM PST US Subject: Yak-List: CJ6 prop reversal From: "Okanogan Lew" Guys, during my last 5-6 flights, while shutting down the engine, twice it has reversed the direction & has turned 3-4 blades before stopping. Has anyone else had this experience & I wonder what is causing it & if there is damaged being done? I have flown about 60 hrs in this plane & this is the first time this has happened. I do run ethanol free auto fuel with occasional av gas & MMO. My shut down procedure is to run the engine up to 1600 rpm for about 15 secs, bring it to idle & turn off the mags. Should I be bringing the mixture to lean before shutting off the mags? This is a stock 285 HP engine, Thanks for any advice. Paul Lewis Read this topic online here: http://forums.matronics.com/viewtopic.php?p=384838#384838 ________________________________ Message 2 _____________________________________ Time: 07:46:05 AM PST US From: "George Coy" Subject: RE: Yak-List: Hose replacement Yak 52 Chris, We can supply new manufactured Russian hose. You would have to re-use your existing hose ends. Contact off list for more info. George Coy CAS Ltd. 714 Airport Rd. Swanton VT 05488 802-868-5633 off 802-363-5782 cell 802-868-4465 Fax george.coy@gmail.com http://coyafct.com/ SKYPE george.coy -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of CHRIS ABBOTT Sent: Sunday, October 07, 2012 2:07 AM Subject: Yak-List: Hose replacement Yak 52 Does anyone know the best deal on hose replacement or can the hose be purchased to enable me to get done in Aussie ? Thank you, CHRIS ABBOTT ________________________________ Message 3 _____________________________________ Time: 08:13:55 AM PST US Subject: Re: Yak-List: CJ6 prop reversal From: Paul Lewis An important point I forgot, is that I do have the auto spark plug conversion. Paul On Sun, Oct 7, 2012 at 7:17 AM, Okanogan Lew wrote: > > Guys, during my last 5-6 flights, while shutting down the engine, twice it > has reversed the direction & has turned 3-4 blades before stopping. Has > anyone else had this experience & I wonder what is causing it & if there is > damaged being done? I have flown about 60 hrs in this plane & this is the > first time this has happened. I do run ethanol free auto fuel with > occasional av gas & MMO. My shut down procedure is to run the engine up to > 1600 rpm for about 15 secs, bring it to idle & turn off the mags. Should I > be bringing the mixture to lean before shutting off the mags? This is a > stock 285 HP engine, Thanks for any advice. > > Paul Lewis > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=384838#384838 > > ________________________________ Message 4 _____________________________________ Time: 11:11:15 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: CJ6 prop reversal Paul; Since there is no idle cut-off system in the carb. ignition cut-out is the only method available. This is basically the same process that I recall from the days of C65=99s, etc. but with the advantage at least of a CHT guage. The process I use for the Huosai or the M14P is Fine pitch, 1500 RPM for exactly one minute (time and RPM could vary but should be the same at each shut-down to facilitate oil scavenge and give a reliable basis for measuring oil consumption), Prop lever to coarse pitch, Wait for min. RPM and max. MP, Throttle to idle, Check for CHT below 140 deg.C, Switch off. The Chinese manual adds another action which was standard and absolutely necessary in the C65 days. That is : Throttle slowly to full Open with switch closure. I think your problem is not enough cylinder cooling time. Whether auto plugs would be more prone to after fire I don=99t know. Hope that helps; Walt From: Paul Lewis Sent: Sunday, October 07, 2012 8:11 AM Subject: Re: Yak-List: CJ6 prop reversal An important point I forgot, is that I do have the auto spark plug conversion. Paul On Sun, Oct 7, 2012 at 7:17 AM, Okanogan Lew wrote: Guys, during my last 5-6 flights, while shutting down the engine, twice it has reversed the direction & has turned 3-4 blades before stopping. Has anyone else had this experience & I wonder what is causing it & if there is damaged being done? I have flown about 60 hrs in this plane & this is the first time this has happened. I do run ethanol free auto fuel with occasional av gas & MMO. My shut down procedure is to run the engine up to 1600 rpm for about 15 secs, bring it to idle & turn off the mags. Should I be bringing the mixture to lean before shutting off the mags? This is a stock 285 HP engine, Thanks for any advice. Paul Lewis Read this topic online here: http://forums.matronics.com/viewtopic.php?p=384838#384838 ========== rget="_blank">http://www.matronics.com/Navigator?Yak-List ========== http://forums.matronics.com ========== le, List Admin. ="_blank">http://www.matronics.com/contribution ========== ________________________________ Message 5 _____________________________________ Time: 11:32:28 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: CJ6 prop reversal A point that I forgot to mention: - Open gills for maximum cylinder cooling! Walt From: Paul Lewis Sent: Sunday, October 07, 2012 8:11 AM Subject: Re: Yak-List: CJ6 prop reversal An important point I forgot, is that I do have the auto spark plug conversion. Paul On Sun, Oct 7, 2012 at 7:17 AM, Okanogan Lew wrote: Guys, during my last 5-6 flights, while shutting down the engine, twice it has reversed the direction & has turned 3-4 blades before stopping. Has anyone else had this experience & I wonder what is causing it & if there is damaged being done? I have flown about 60 hrs in this plane & this is the first time this has happened. I do run ethanol free auto fuel with occasional av gas & MMO. My shut down procedure is to run the engine up to 1600 rpm for about 15 secs, bring it to idle & turn off the mags. Should I be bringing the mixture to lean before shutting off the mags? This is a stock 285 HP engine, Thanks for any advice. Paul Lewis Read this topic online here: http://forums.matronics.com/viewtopic.php?p=384838#384838 ========== rget="_blank">http://www.matronics.com/Navigator?Yak-List ========== http://forums.matronics.com ========== le, List Admin. ="_blank">http://www.matronics.com/contribution ========== ________________________________ Message 6 _____________________________________ Time: 04:12:14 PM PST US Subject: Re: Yak-List: CJ6 prop reversal From: Paul Lewis Thanks Walt, I pulled a plug (NGK BR5HS) & it looked black, but not oily or sooty. Paul On Sun, Oct 7, 2012 at 11:30 AM, Walter Lannon wrote: > A point that I forgot to mention: - Open gills for maximum cylinder > cooling! > > Walt > > *From:* Paul Lewis > *Sent:* Sunday, October 07, 2012 8:11 AM > *To:* yak-list@matronics.com > *Subject:* Re: Yak-List: CJ6 prop reversal > > An important point I forgot, is that I do have the auto spark plug > conversion. > > Paul > > On Sun, Oct 7, 2012 at 7:17 AM, Okanogan Lew wrote: > >> >> Guys, during my last 5-6 flights, while shutting down the engine, twice >> it has reversed the direction & has turned 3-4 blades before stopping. Has >> anyone else had this experience & I wonder what is causing it & if there is >> damaged being done? I have flown about 60 hrs in this plane & this is the >> first time this has happened. I do run ethanol free auto fuel with >> occasional av gas & MMO. My shut down procedure is to run the engine up to >> 1600 rpm for about 15 secs, bring it to idle & turn off the mags. Should I >> be bringing the mixture to lean before shutting off the mags? This is a >> stock 285 HP engine, Thanks for any advice. >> >> Paul Lewis >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=384838#384838 >> >> >> >> >> >> >> >> ========== >> rget="_blank">http://www.matronics.com/Navigator?Yak-List >> ========== >> http://forums.matronics.com >> ========== >> le, List Admin. >> ="_blank">http://www.matronics.com/contribution >> ========== >> >> >> >> > * > > href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List > href="http://forums.matronics.com">http://forums.matronics.com > href="http://www.matronics.com/contribution">http://www.matronics.com/c* > > * > > * > > ________________________________ Message 7 _____________________________________ Time: 10:00:41 PM PST US Subject: Re: Yak-List: CJ6 prop reversal From: Gary Gabbard Paul, Gary Gabbard (CJ N22YK) here, I have a suggestion on the kick back pro blem. What is the RPM when you have the throttle closed and the idle stabili zes? If it is a low idle speed you might adjust the idle RPM up a 100 RPM. I have had engines that would kick back on shut down. By adjusting the idle u p a little higher it stopped. Reason is that if the throttle plate in the ca rb. throat is completely closed it will cause fuel to be drawn up the intake by the low pressure in the intake manifold. By adjusting the idle up a bit it leaves the throttle plate a bit open and reduces the suction of fuel up i nto the cyls. No fuel, no kick back. It is worth a try. Let us know how it g oes. Gary Sent from my iPhone On Oct 7, 2012, at 16:09, Paul Lewis wrote: > Thanks Walt, I pulled a plug (NGK BR5HS) & it looked black, but not oily o r sooty. > > Paul > > On Sun, Oct 7, 2012 at 11:30 AM, Walter Lannon wrote: >> A point that I forgot to mention: - Open gills for maximum cylinder cool ing! >> >> Walt >> >> From: Paul Lewis >> Sent: Sunday, October 07, 2012 8:11 AM >> To: yak-list@matronics.com >> Subject: Re: Yak-List: CJ6 prop reversal >> >> An important point I forgot, is that I do have the auto spark plug conver sion. >> >> Paul >> >> On Sun, Oct 7, 2012 at 7:17 AM, Okanogan Lew wrot e: >>> >>> Guys, during my last 5-6 flights, while shutting down the engine, twice i t has reversed the direction & has turned 3-4 blades before stopping. Has a nyone else had this experience & I wonder what is causing it & if there is d amaged being done? I have flown about 60 hrs in this plane & this is the fi rst time this has happened. I do run ethanol free auto fuel with occasional av gas & MMO. My shut down procedure is to run the engine up to 1600 rpm f or about 15 secs, bring it to idle & turn off the mags. Should I be bringin g the mixture to lean before shutting off the mags? This is a stock 285 HP e ngine, Thanks for any advice. >>> >>> Paul Lewis >>> >>> >>> >>> >>> Read this topic online here: >>> >>> http://forums.matronics.com/viewtopic.php?p=384838#384838 >>> >>> >>> >>> >>> >>> >>> >>> ========== >>> rget="_blank">http://www.matronics.com/Navigator?Yak-List >>> ========== >>> http://forums.matronics.com >>> ========== >>> le, List Admin. >>> ="_blank">http://www.matronics.com/contribution >>> ========== >> >> >> >> href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics .com/Navigator?Yak-List >> href="http://forums.matronics.com">http://forums.matronics.com >> href="http://www.matronics.com/contribution">http://www.matronics.com/c >> >> >> et="_blank">http://www.matronics.com/Navigator?Yak-List >> tp://forums.matronics.com >> _blank">http://www.matronics.com/contribution >> > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ------------------------------------------------------------------------------------- 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.