Today's Message Index:
----------------------
1. 04:29 AM - Re: CJ6 prop reversal (A. Dennis Savarese)
2. 05:47 AM - Re: Yak-List Digest: 7 Msgs - 10/07/12 (Buddy Moman)
3. 05:53 AM - Re: Re: Yak-List Digest: 7 Msgs - 10/07/12 (A. Dennis Savarese)
4. 07:27 AM - Re: CJ6 prop reversal (Paul Lewis)
5. 08:27 AM - Re: CJ6 prop reversal (Warren Hill)
6. 08:47 AM - Re: CJ6 prop reversal (A. Dennis Savarese)
7. 06:24 PM - CJ-6 Engine trouble (Thomas McKeon)
Message 1
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| Subject: | Re: CJ6 prop reversal |
Also, The BR5HS plugs are one heat range hotter than the ones I supply
in the automotive conversion kit, which are BR6HS's. The hotter plugs
(BR5HS) may be contributing to the issue in combination with the auto
fuel. Here is an excellent video explaining what "hot spark plug" versus
"cold spark plug".
http://www.youtube.com/watch?v=LbR75wq9nmM
Try changing back to the BR6HS plugs and gap them at .020 and see if the
problem goes away.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/7/2012 1:08 PM, Walter Lannon wrote:
> 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 C65s, 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 dont know.
> Hope that helps;
> Walt
> *From:* Paul Lewis <mailto:okanoganlew@gmail.com>
> *Sent:* Sunday, October 07, 2012 8:11 AM
> *To:* yak-list@matronics.com <mailto: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 <vplewis@community.org
> <mailto:vplewis@community.org>> wrote:
>
> <vplewis@community.org <mailto:vplewis@community.org>>
>
> 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 2
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| Subject: | Re: Yak-List Digest: 7 Msgs - 10/07/12 |
Very valuable info...and presented so that engine dummies like me can understand
it. This really underscores your suggestion to the guy who posted on the list
about kickbacks.
Buddy
Sent from my iPad
On Oct 8, 2012, at 2:01 AM, Yak-List Digest Server <yak-list@matronics.com> wrote:
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Yak-List Digest can also be found in either of the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Yak-List Digest and can be viewed with a generic text editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 12-10-07&Archive=Yak
>
> Text Version:
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 12-10-07&Archive=Yak
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> 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" <vplewis@community.org>
>
>
> 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" <george.coy@gmail.com>
> 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 <okanoganlew@gmail.com>
>
> 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 <vplewis@community.org> 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" <wlannon@shaw.ca>
> 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 <vplewis@community.org>
> 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" <wlannon@shaw.ca>
> 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 <vplewis@community.org>
> 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 <okanoganlew@gmail.com>
>
> 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 <wlannon@shaw.ca> wrote:
>
>> A point that I forgot to mention: - Open gills for maximum cylinder
>> cooling!
>>
>> Walt
>>
>> *From:* Paul Lewis <okanoganlew@gmail.com>
>> *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 <vplewis@community.org>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 <ggg6@att.net>
>
> 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 <okanoganlew@gmail.com> 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 <wlannon@shaw.ca> 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 <vplewis@community.org> 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
>>>
>>
>>
>>
> =========================
> ========
> =========================
> ========
> =========================
> ========
> =========================
> ========
>>
>
>
>
>
>
>
>
>
Message 3
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| Subject: | Re: Yak-List Digest: 7 Msgs - 10/07/12 |
I thought so too. Hopefully it will help him.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/8/2012 7:44 AM, Buddy Moman wrote:
>
> Very valuable info...and presented so that engine dummies like me can understand
it. This really underscores your suggestion to the guy who posted on the
list about kickbacks.
> Buddy
>
> Sent from my iPad
>
> On Oct 8, 2012, at 2:01 AM, Yak-List Digest Server <yak-list@matronics.com> wrote:
>
>> *
>>
>> =================================================
>> Online Versions of Today's List Digest Archive
>> =================================================
>>
>> Today's complete Yak-List Digest can also be found in either of the
>> two Web Links listed below. The .html file includes the Digest formatted
>> in HTML for viewing with a web browser and features Hyperlinked Indexes
>> and Message Navigation. The .txt file includes the plain ASCII version
>> of the Yak-List Digest and can be viewed with a generic text editor
>> such as Notepad or with a web browser.
>>
>> HTML Version:
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 12-10-07&Archive=Yak
>>
>> Text Version:
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 12-10-07&Archive=Yak
>>
>>
>> ===============================================
>> EMail Version of Today's List Digest Archive
>> ===============================================
>>
>>
>> ----------------------------------------------------------
>> 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" <vplewis@community.org>
>>
>>
>> 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" <george.coy@gmail.com>
>> 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 <okanoganlew@gmail.com>
>>
>> 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 <vplewis@community.org> 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" <wlannon@shaw.ca>
>> 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 <vplewis@community.org>
>> 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" <wlannon@shaw.ca>
>> 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 <vplewis@community.org>
>> 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 <okanoganlew@gmail.com>
>>
>> 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 <wlannon@shaw.ca> wrote:
>>
>>> A point that I forgot to mention: - Open gills for maximum cylinder
>>> cooling!
>>>
>>> Walt
>>>
>>> *From:* Paul Lewis <okanoganlew@gmail.com>
>>> *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 <vplewis@community.org>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 <ggg6@att.net>
>>
>> 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 <okanoganlew@gmail.com> 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 <wlannon@shaw.ca> 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 <vplewis@community.org> 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
>>>>
>>>
>>>
>> =========================
>> ========
>> =========================
>> ========
>> =========================
>> ========
>> =========================
>> ========
>>
>>
>>
>>
>>
>>
>>
>
>
Message 4
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| Subject: | Re: CJ6 prop reversal |
Dennis, I changed to the hotter plug because the originals looked black &
sooty. I will go back & see if that helps. Thanks.
Paul
On Mon, Oct 8, 2012 at 4:25 AM, A. Dennis Savarese <
dsavarese0812@bellsouth.net> wrote:
> dsavarese0812@bellsouth.net>
>
> Also, The BR5HS plugs are one heat range hotter than the ones I supply in
> the automotive conversion kit, which are BR6HS's. The hotter plugs (BR5HS
)
> may be contributing to the issue in combination with the auto fuel. Here
is
> an excellent video explaining what "hot spark plug" versus "cold spark
> plug".
>
> http://www.youtube.com/watch?**v=LbR75wq9nmM<http://www.youtube.com/wat
ch?v=LbR75wq9nmM>
>
> Try changing back to the BR6HS plugs and gap them at .020 and see if the
> problem goes away.
> Dennis
>
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
>
> On 10/7/2012 1:08 PM, Walter Lannon wrote:
>
>> 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 rec
all
>> from the days of C65=92s, 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 ea
ch
>> shut-down to facilitate oil scavenge and give a reliable basis for
>> measuring oil consumption), Prop lever to coarse pitch, Wait for min. RP
M
>> 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=92t know.
>> Hope that helps;
>> Walt
>> *From:* Paul Lewis <mailto:okanoganlew@gmail.com>
>> *Sent:* Sunday, October 07, 2012 8:11 AM
>> *To:* yak-list@matronics.com <mailto: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 <vplewis@community.org<mail
to:
>> vplewis@community.org>**> wrote:
>>
>> <vplewis@community.org <mailto:vplewis@community.org>**>
>>
>>
>> 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<http:/
/forums.matronics.com/viewtopic.php?p=384838#384838>
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> rget="_blank">http://www.**matronics.com/Navigator?Yak-**List<http
://www.matronics.com/Navigator?Yak-List>
>> ==========
>> http://forums.matronics.com
>> ==========
>> le, List Admin.
>> ="_blank">http://www.**matronics.com/contribution<http://www.matro
nics.com/contribution>
>> ==========
>>
>>
>>
>>
>> *
>>
>> href="http://www.matronics.**com/Navigator?Yak-List<http://www.matroni
cs.com/Navigator?Yak-List>
>> ">http:/**/www.matronics.com/Navigator?**Yak-List<http://www.matronics.c
om/Navigator?Yak-List>
>> href="http://forums.matronics.**com <http://forums.matronics.com>">
>> http://forums.matronics.**com <http://forums.matronics.com>
>> href="http://www.matronics.**com/contribution<http://www.matronics.com
/contribution>
>> ">http://www.**matronics.com/c <http://www.matronics.com/c>
>> *
>> *
>>
>>
>> *
>>
>
>
=====**===================
===========**=
onics.com/Navigator?Yak-List>
=====**===================
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Message 5
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| Subject: | Re: CJ6 prop reversal |
Paul,
At Dennis' suggestion, I went in the opposite direction from the BR7HS
to the BR6HS with a 0.020 gag and the engine performed noticeably
better.
Warren
On Oct 8, 2012, at 7:24 AM, Paul Lewis wrote:
> Dennis, I changed to the hotter plug because the originals looked
black & sooty. I will go back & see if that helps. Thanks.
>
> Paul
>
> On Mon, Oct 8, 2012 at 4:25 AM, A. Dennis Savarese
<dsavarese0812@bellsouth.net> wrote:
<dsavarese0812@bellsouth.net>
>
> Also, The BR5HS plugs are one heat range hotter than the ones I supply
in the automotive conversion kit, which are BR6HS's. The hotter plugs
(BR5HS) may be contributing to the issue in combination with the auto
fuel. Here is an excellent video explaining what "hot spark plug" versus
"cold spark plug".
>
> http://www.youtube.com/watch?v=LbR75wq9nmM
>
> Try changing back to the BR6HS plugs and gap them at .020 and see if
the problem goes away.
> Dennis
>
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
>
> On 10/7/2012 1:08 PM, Walter Lannon wrote:
> 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=92s, 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=92t know.
> Hope that helps;
> Walt
> *From:* Paul Lewis <mailto:okanoganlew@gmail.com>
> *Sent:* Sunday, October 07, 2012 8:11 AM
> *To:* yak-list@matronics.com <mailto: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 <vplewis@community.org
<mailto:vplewis@community.org>> wrote:
>
> <vplewis@community.org <mailto:vplewis@community.org>>
>
>
> 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
> *
> *
>
>
> *
>
>
> ========================
===========
> rget="_blank">http://www.matronics.com/Navigator?Yak-List
> ========================
===========
> http://forums.matronics.com
> ========================
===========
> le, List Admin.
> ="_blank">http://www.matronics.com/contribution
> ========================
===========
>
>
>
>
>
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>
Message 6
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|
| Subject: | Re: CJ6 prop reversal |
Black and sooty does not necessarily mean the plugs are too cold. It can
be caused by the mixture being too rich. On the CJ you have the
additional benefit of a mixture control.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/8/2012 9:24 AM, Paul Lewis wrote:
> Dennis, I changed to the hotter plug because the originals looked
> black & sooty. I will go back & see if that helps. Thanks.
> Paul
>
> On Mon, Oct 8, 2012 at 4:25 AM, A. Dennis Savarese
> <dsavarese0812@bellsouth.net <mailto:dsavarese0812@bellsouth.net>> wrote:
>
> <dsavarese0812@bellsouth.net <mailto:dsavarese0812@bellsouth.net>>
>
> Also, The BR5HS plugs are one heat range hotter than the ones I
> supply in the automotive conversion kit, which are BR6HS's. The
> hotter plugs (BR5HS) may be contributing to the issue in
> combination with the auto fuel. Here is an excellent video
> explaining what "hot spark plug" versus "cold spark plug".
>
> http://www.youtube.com/watch?v=LbR75wq9nmM
>
> Try changing back to the BR6HS plugs and gap them at .020 and see
> if the problem goes away.
> Dennis
>
> A. Dennis Savarese
> 334-285-6263 <tel:334-285-6263>
> 334-546-8182 <tel:334-546-8182> (mobile)
> www.yak-52.com <http://www.yak-52.com>
> Skype - Yakguy1
>
>
> On 10/7/2012 1:08 PM, Walter Lannon wrote:
>
> 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 C65s, 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 dont know.
> Hope that helps;
> Walt
> *From:* Paul Lewis <mailto:okanoganlew@gmail.com
> <mailto:okanoganlew@gmail.com>>
> *Sent:* Sunday, October 07, 2012 8:11 AM
> *To:* yak-list@matronics.com <mailto:yak-list@matronics.com>
> <mailto:yak-list@matronics.com <mailto: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
> <vplewis@community.org <mailto:vplewis@community.org>
> <mailto:vplewis@community.org <mailto:vplewis@community.org>>>
> wrote:
>
> <vplewis@community.org <mailto:vplewis@community.org>
> <mailto:vplewis@community.org <mailto:vplewis@community.org>>>
>
>
> 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
> ==========
>
>
> *
>
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Message 7
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| Subject: | CJ-6 Engine trouble |
Hello=2C
I am having some engine trouble and I am hoping your experience can point m
e in the right direction.
I have a CJ-6 with a Housai 285hp engine. I went to go fly one day and I s
tarted to runup my engine. At low RPM everything seemed fine. Once above
1750 RPM things changed. The RPM needle (Manifold press needle would move
in sequence with RPM) would sporatically jump around. When it would jump t
he engine would chug as if it were about to die and then surge to life. Th
is would happen about every 20 seconds. When I would cycle the Mags the en
gine would immediately chug and start to die and would certainly cut off if
I didn't quickly put the mags back to "both". This would happen with eit
her left or right mag.
I took the plane back to my hangar and looked at a few things. I pulled th
e fuel filter screen on the lower left of the firewall=2C it was clean. I
pulled the spark plugs from the bottom cylinders and they were good. (I ju
st picked up the plane from a full maintenance inspeciton by Jim Selby in A
ugust so everything should be pretty good). Of note=2C the primer was lock
ed. I opened the top of the Magnetos with the local maintenance workers at
my field and looked for any damage. We didn't notice any. Also of note
=2C I have been using Auto gas 87 octane with ethanol. I have been doing t
his for about a month. It wasn't until a week ago I found out this was bad
and I was looking forward to burning off all the fuel in my tanks to repla
ce it with 100LL. But due to this engine problem the tanks are still full
of auto gas.
Right now I am guessing it is either fuel related=2C or ignition related.
Any advice would be appreciated.
Tom
PS. Previous problems with the pneumatic system have been fixed. Thanks.
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