Today's Message Index:
----------------------
1. 04:51 AM - Re: Engine vibration (Jill Gernetzke)
2. 05:47 AM - Re: Engine Vibration (Rico Jaeger)
3. 05:58 AM - Re: Engine Vibration (George S. Coy)
4. 06:05 AM - CJ engine parts (George S. Coy)
5. 06:18 AM - Re: Engine Vibration (Todd McCutchan)
6. 07:04 AM - Re: Engine Vibration (Rico Jaeger)
7. 07:37 AM - Yak 18T Attitude indicator (Jerry Painter)
8. 08:00 AM - Re: Yak 18T Attitude indicator (A. Dennis Savarese)
9. 09:09 AM - Re: CJ engine parts (doug sapp)
10. 09:17 AM - Re: CJ engine parts (George S. Coy)
11. 12:52 PM - Re: Stainless Gill Vane Screws (Sonic1)
Message 1
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| Subject: | Re: Engine vibration |
Anthony & Group,
I advised having someone with a dynamic balancer check for anomalies on the
crank vibration based upon the vibration only occurring at the RPM/MP
combination. If the balancer has two pickup points, it can check for this.
Of course, you would perform a dynamic balance of the prop and that would be
the starting point anyway. If there is a prop out of balance vibration, it
typically never goes away. Could there be a blade out of track producing a
harmonic that seems like a vibration? Perhaps.
Anthony, it would be helpful if you could fill in the blanks for the group
regarding conditions in which this problem started? How much of a vibration
is it? etc, etc...anything that can help sleuth out the problem.
As an aside, our B&C Specialty promo on the SK35 alternator has been wildly
successful. I sold out of the alternators I bought for my stock and will be
placing one more large order before the promo ends on 1/31/15. The
alternator/regulator combo is $728. Matt Dralle of the Yaklist has reaped
some reward - $80 from sales on this list. : )
Jill
M-14P, Inc.
Message 2
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| Subject: | Engine Vibration |
I also have what is described below - a slowly-oscillating vibration that p
eaks and subsides in 2 -3 seconds - also at 80%. Nothing else like it at an
y other setting...
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //Hangar #21 / AUW
From: k2@tulsaconnect.com
Subject: Re: Yak-List: Engine Vibration
=0A
=0A
=0A
=0A
=0A
=0A
Any drone of vibration felt in the cockpit=2C kinda like a twin engine =0A
prop out of sync... is usually due to=2C say=2C an airframe problem...
=0A
too much slop in a trim tab.=0A
Or to a prop problem.. like a blade angle getting out of sync..=0A
=0A
My first guess is to check the blade counterweighs which may be a little
=0A
tight=2C due to needed lubrication.. or a slight difference in bolt torque
on =0A
those counterweights which may cause a sticking blade not to follow =0A
the other.. =0A
One time=2C after shipment=2C a crew failed to turn in on blade that last
=0A
millimeter to bottom one blade.=0A
=0A
When you search for someone to provide a dynamic prop balance=2C be =0A
sure to find someone with lots of experience... =0A
=0A
Its rather easy to do a Pratt 1340 which usually has a tight =0A
planetary prop reduction system.=0A
Most respond well and are predictable..=0A
=0A
But M14 engines can be all over the place...=0A
The frequency sidebands can confuse the balancing equipment =0A
easily.=0A
=0A
I don=92t post here often... But Monty Barrett and Allen know =0A
me..=0A
=0A
Tulsa Oklahoma a number of Yaks & Cj=92s.. Not writing about =0A
me but=2C Some Mechanics here are very good and know the models well.=0A
regards.=0A
=0A
Kent Felkins=0A
Tulsa=0A
=0A
=0A
=0A
=0A
=0A
=0A
From: Byron Fox =0A
Sent: Tuesday=2C January 20=2C 2015 19:54 PM=0A
Subject: Re: Yak-List: Engine Vibration=0A
=0A
=0A
Of an out of balance prop.
Blitz Fox =0A
415-307-2405=0A
On Jan 20=2C 2015=2C at 5:30 PM=2C Anthony Hudacek <antdea2000@yahoo.com.au
> =0A
wrote:
=0A
=0A
=0A
=0A
Hello Yakkers=2C=0A
=0A
My engine has developed a =0A
vibration when running my M14P at 80% & 8. It's almost like a drone that
=0A
comes in every 2 - 3 seconds. At every other power setting it is fine. Ha
s =0A
anyone else experienced this before? I have been in touch with Jill who t
hinks =0A
it could be a bent link rod.=0A
=0A
Cheers.=0A
=0A
===========0A
ctric.com=0A
>www.buildersbooks.com=0A
uilthelp.com=0A
otstore.com=0A
=0A
matronics.com/contribution=0A
===========0A
//www.matronics.com/Navigator?Yak-List=0A
===========0A
cs.com=0A
===========0A
=0A
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=0A
href="http://www.aeroelectric.com">www.aeroelectric.com=0A
href="http://www.buildersbooks.com">www.buildersbooks.com=0A
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href="http://www.mypilotstore.com">www.mypilotstore.com=0A
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href="http://www.matronics.com/contribution">http://www.matronics.com/chr
ef="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com
/Navigator?Yak-List=0A
href="http://forums.matronics.com">http://forums.matronics.com=0A
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============0A
=0A
Message 3
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| Subject: | Engine Vibration |
Is the manifold pressure close to the pressure altitude?
George
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Rico Jaeger
Sent: Wednesday, January 21, 2015 8:47 AM
Subject: RE: Yak-List: Engine Vibration
I also have what is described below - a slowly-oscillating vibration that
peaks and subsides in 2 -3 seconds - also at 80%. Nothing else like it at
any other setting...
Rico Jaeger
915 S. 11th Ave.
Wausau, WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //
Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //
Hangar #21 / AUW
_____
From: k2@tulsaconnect.com
Subject: Re: Yak-List: Engine Vibration
Any drone of vibration felt in the cockpit, kinda like a twin engine prop
out of sync... is usually due to, say, an airframe problem... too much
slop in a trim tab.
Or to a prop problem.. like a blade angle getting out of sync..
My first guess is to check the blade counterweighs which may be a little
tight, due to needed lubrication.. or a slight difference in bolt torque on
those counterweights which may cause a sticking blade not to follow the
other..
One time, after shipment, a crew failed to turn in on blade that last
millimeter to bottom one blade.
When you search for someone to provide a dynamic prop balance, be sure to
find someone with lots of experience...
Its rather easy to do a Pratt 1340 which usually has a tight planetary prop
reduction system.
Most respond well and are predictable..
But M14 engines can be all over the place...
The frequency sidebands can confuse the balancing equipment easily.
I don't post here often... But Monty Barrett and Allen know me..
Tulsa Oklahoma a number of Yaks & Cj's.. Not writing about me but, Some
Mechanics here are very good and know the models well.
regards.
Kent Felkins
Tulsa
From: Byron Fox <mailto:byronmfox@gmail.com>
Sent: Tuesday, January 20, 2015 19:54 PM
Subject: Re: Yak-List: Engine Vibration
Of an out of balance prop.
Blitz Fox
415-307-2405
On Jan 20, 2015, at 5:30 PM, Anthony Hudacek <antdea2000@yahoo.com.au>
wrote:
Hello Yakkers,
My engine has developed a vibration when running my M14P at 80% & 8. It's
almost like a drone that comes in every 2 - 3 seconds. At every other power
setting it is fine. Has anyone else experienced this before? I have been in
touch with Jill who thinks it could be a bent link rod.
Cheers.
=========
ctric.com
>www.buildersbooks.com
uilthelp.com
otstore.com
matronics.com/contribution
=========
//www.matronics.com/Navigator?Yak-List
=========
cs.com
=========
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Message 4
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Hey guys, I have a client looking for AI14RA engine parts. Are the engine
parts generally available?
The Chinese CJ6 engine was a originally a license built AI14RA engine. The
Motorstar factory has disassembled several of the Chinese engines and has
found the parts identical to the AI14 engine.
George Coy
CAS Ltd.
629 Airport Rd.
Swanton VT 05488 USA
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
<mailto:george.coy@gmail.com> george.coy@gmail.com
<http://coyacft.com/> http://coyacft.com/
SKYPE george.coy
Message 5
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| Subject: | Re: Engine Vibration |
I was told that the Yak 50 with the V-530 having a slow harmonic "pulse" is v
ery common around 80% and is the engine / prop / airframe interaction causin
g a harmonic "wave" through the airframe.
Not sure if it is true but is what I was told.
Of course if it didn't do it before would check it out. Also if there was so
me "event" that precluded it would be interesting.
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
> On Jan 21, 2015, at 6:47 AM, Rico Jaeger <rocknpilot@hotmail.com> wrote:
>
> I also have what is described below - a slowly-oscillating vibration that p
eaks and subsides in 2 -3 seconds - also at 80%. Nothing else like it at any
other setting...
>
> Rico Jaeger
> 915 S. 11th Ave.
> Wausau, WI. 54401
> 715.529.7426
> //
> 1966 Cessna 150F ^/---//-X
> N8558G //
> Hangar #35 / AUW
> //
> 1992 Yakovlev Yak 52 ^/---//-X
> N21YK //
> Hangar #21 / AUW
>
>
>
>
> From: k2@tulsaconnect.com
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Engine Vibration
> Date: Tue, 20 Jan 2015 21:19:51 -0600
>
>
> Any drone of vibration felt in the cockpit, kinda like a twin engine prop
out of sync... is usually due to, say, an airframe problem... too much sl
op in a trim tab.
> Or to a prop problem.. like a blade angle getting out of sync..
>
> My first guess is to check the blade counterweighs which may be a little t
ight, due to needed lubrication.. or a slight difference in bolt torque on t
hose counterweights which may cause a sticking blade not to follow the oth
er..
> One time, after shipment, a crew failed to turn in on blade that last mil
limeter to bottom one blade.
>
> When you search for someone to provide a dynamic prop balance, be sure to
find someone with lots of experience...
>
> Its rather easy to do a Pratt 1340 which usually has a tight planetary pr
op reduction system.
> Most respond well and are predictable..
>
> But M14 engines can be all over the place...
> The frequency sidebands can confuse the balancing equipment easily.
>
> I don=99t post here often... But Monty Barrett and Allen know me..
>
> Tulsa Oklahoma a number of Yaks & Cj=99s.. Not writing about me bu
t, Some Mechanics here are very good and know the models well.
> regards.
>
> Kent Felkins
> Tulsa
>
>
>
> From: Byron Fox
> Sent: Tuesday, January 20, 2015 19:54 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Engine Vibration
>
> Of an out of balance prop.
>
> Blitz Fox
> 415-307-2405
>
> On Jan 20, 2015, at 5:30 PM, Anthony Hudacek <antdea2000@yahoo.com.au> wro
te:
>
> Hello Yakkers,
>
> My engine has developed a vibration when running my M14P at 80% & 8. It's a
lmost like a drone that comes in every 2 - 3 seconds. At every other power s
etting it is fine. Has anyone else experienced this before? I have been in t
ouch with Jill who thinks it could be a bent link rod.
>
> Cheers.
>
>
> =========
> ctric.com
> >www.buildersbooks.com
> uilthelp.com
> otstore.com
>
> matronics.com/contribution
> =========
> //www.matronics.com/Navigator?Yak-List
> =========
> cs.com
> =========
>
>
>
> href="http://www.aeroelectric.com">www.aeroelectric.com
> href="http://www.buildersbooks.com">www.buildersbooks.com
> href="http://www.homebuilthelp.com">www.homebuilthelp.com
> href="http://www.mypilotstore.com">www.mypilotstore.com
> href="http://www.mrrace.com">www.mrrace.com
> href="http://www.matronics.com/contribution">http://www.matronics.com/ch
ref="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com
/Navigator?Yak-List
> href="http://forums.matronics.com">http://forums.matronics.com
>
>
>
> ==========
> _blank">www.aeroelectric.com
> " target="_blank">www.buildersbooks.com
> ="_blank">www.homebuilthelp.com
> ="_blank">www.mypilotstore.com
> ank">www.mrrace.com
> ="_blank">http://www.matronics.com/contribution
> ==========
> rget="_blank">http://www.matronics.com/Navigator?Yak-List
> ==========
> http://forums.matronics.com
> ==========
>
>
>
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
Message 6
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| Subject: | Engine Vibration |
Todd's description was the best yet of something very difficult to accurate
ly and adequately put into words. ("Harmonic Wave" Love it!) THAT is what i
t feels like - an airframe "resonance" which occurs only under specific set
tings - a lot like singing in the shower (NEVER COUNTRY!) and certain pitch
es appear to be amplified by the shape of the shower shell. Nothing preclud
ed the vibrations I'm detecting=2C but I only have about 90 personal hours
on my aircraft.
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //Hangar #21 / AUW
From: todd@fastaircraft.com
Subject: Re: Yak-List: Engine Vibration
I was told that the Yak 50 with the V-530 having a slow harmonic "pulse" is
very common around 80% and is the engine / prop / airframe interaction cau
sing a harmonic "wave" through the airframe.
Not sure if it is true but is what I was told.
Of course if it didn't do it before would check it out. Also if there was s
ome "event" that precluded it would be interesting.
Todd McCutchanT-34A & Yak-50Cell: (260) 402-1740E-mail: todd@fastaircraft.c
omwww.fastaircraft.com
On Jan 21=2C 2015=2C at 6:47 AM=2C Rico Jaeger <rocknpilot@hotmail.com> wro
te:
=0A
=0A
=0A
I also have what is described below - a slowly-oscillating vibration that p
eaks and subsides in 2 -3 seconds - also at 80%. Nothing else like it at an
y other setting...
Rico Jaeger
915 S. 11th Ave.
Wausau=2C WI. 54401
715.529.7426
//
1966 Cessna 150F ^/---//-X
N8558G //Hangar #35 / AUW
//
1992 Yakovlev Yak 52 ^/---//-X
N21YK //Hangar #21 / AUW
From: k2@tulsaconnect.com
Subject: Re: Yak-List: Engine Vibration
=0A
=0A
=0A
=0A
=0A
=0A
Any drone of vibration felt in the cockpit=2C kinda like a twin engine =0A
prop out of sync... is usually due to=2C say=2C an airframe problem...
=0A
too much slop in a trim tab.=0A
Or to a prop problem.. like a blade angle getting out of sync..=0A
=0A
My first guess is to check the blade counterweighs which may be a little
=0A
tight=2C due to needed lubrication.. or a slight difference in bolt torque
on =0A
those counterweights which may cause a sticking blade not to follow =0A
the other.. =0A
One time=2C after shipment=2C a crew failed to turn in on blade that last
=0A
millimeter to bottom one blade.=0A
=0A
When you search for someone to provide a dynamic prop balance=2C be =0A
sure to find someone with lots of experience... =0A
=0A
Its rather easy to do a Pratt 1340 which usually has a tight =0A
planetary prop reduction system.=0A
Most respond well and are predictable..=0A
=0A
But M14 engines can be all over the place...=0A
The frequency sidebands can confuse the balancing equipment =0A
easily.=0A
=0A
I don=92t post here often... But Monty Barrett and Allen know =0A
me..=0A
=0A
Tulsa Oklahoma a number of Yaks & Cj=92s.. Not writing about =0A
me but=2C Some Mechanics here are very good and know the models well.=0A
regards.=0A
=0A
Kent Felkins=0A
Tulsa=0A
=0A
=0A
=0A
=0A
=0A
=0A
From: Byron Fox =0A
Sent: Tuesday=2C January 20=2C 2015 19:54 PM=0A
Subject: Re: Yak-List: Engine Vibration=0A
=0A
=0A
Of an out of balance prop.
Blitz Fox =0A
415-307-2405=0A
On Jan 20=2C 2015=2C at 5:30 PM=2C Anthony Hudacek <antdea2000@yahoo.com.au
> =0A
wrote:
=0A
=0A
=0A
=0A
Hello Yakkers=2C=0A
=0A
My engine has developed a =0A
vibration when running my M14P at 80% & 8. It's almost like a drone that
=0A
comes in every 2 - 3 seconds. At every other power setting it is fine. Ha
s =0A
anyone else experienced this before? I have been in touch with Jill who t
hinks =0A
it could be a bent link rod.=0A
=0A
Cheers.=0A
=0A
===========0A
ctric.com=0A
>www.buildersbooks.com=0A
uilthelp.com=0A
otstore.com=0A
=0A
matronics.com/contribution=0A
===========0A
//www.matronics.com/Navigator?Yak-List=0A
===========0A
cs.com=0A
===========0A
=0A
=0A
=0A
href="http://www.aeroelectric.com">www.aeroelectric.com=0A
href="http://www.buildersbooks.com">www.buildersbooks.com=0A
href="http://www.homebuilthelp.com">www.homebuilthelp.com=0A
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ef="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
D=0A
ot=3B">www.aeroelectric.com=0A
books.com"">www.buildersbooks.com=0A
quot=3B">www.homebuilthelp.com=0A
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">www.mrrace.com=0A
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3
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ist"">http://www.matronics.com/Navigator?Yak-List=0A
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Message 7
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| Subject: | Yak 18T Attitude indicator |
Have an -18T attitude indicator that starts to erect but then cages. When
reset it starts up again and then cages. The -18T manual calls for
attaching a piece of test equipment for checking operation but no
diagnostics or repairs. Does anyone know of an instrument shop that works
on these instruments? Instruments for sale?
Jerry Painter
Wild Blue Aviation
FlyWBA.com
FlyWBA@gmail.com
425-876-0865
Message 8
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| Subject: | Re: Yak 18T Attitude indicator |
It is my understanding they are pretty much unrepairable (according to
Termikas), because some of the internal components are no longer
available. Although you may find a used one somewhere, the best
solution is to go with a Dynon D6 or D10.
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 1/21/2015 9:36 AM, Jerry Painter wrote:
>
> Have an -18T attitude indicator that starts to erect but then cages.
> When reset it starts up again and then cages. The -18T manual calls
> for attaching a piece of test equipment for checking operation but no
> diagnostics or repairs. Does anyone know of an instrument shop that
> works on these instruments? Instruments for sale?
>
> Jerry Painter
> Wild Blue Aviation
> FlyWBA.com
> FlyWBA@gmail.com <mailto:FlyWBA@gmail.com>
> 425-876-0865
>
> *
>
>
> *
Message 9
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| Subject: | Re: CJ engine parts |
George,
I stock most all 260 and 285 hp engine parts, what are you looking for?
Doug
On Wed, Jan 21, 2015 at 6:04 AM, George S. Coy <george.coy@gmail.com> wrote:
> Hey guys, I have a client looking for AI14RA engine parts. Are the engine
> parts generally available?
>
> The Chinese CJ6 engine was a originally a license built AI14RA engine. The
> Motorstar factory has disassembled several of the Chinese engines and has
> found the parts identical to the AI14 engine.
>
>
> *George Coy*
>
> *CAS Ltd.*
>
> *629 Airport Rd.*
>
> *Swanton VT 05488 USA*
>
> *802-868-5633 <802-868-5633> off*
>
> *802-363-5782 <802-363-5782> cell*
>
> *802-868-4465 <802-868-4465> Fax*
>
> *george.coy@gmail.com <george.coy@gmail.com>*
>
> *http://coyacft.com/ <http://coyacft.com/>*
>
> *SKYPE george.coy*
>
>
> *
>
>
> *
>
>
Message 10
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Not sure if the Chinese and Polish/Russians used the same part numbers
but here they are:
1. Exhaust valve 10.04.12.K 10 UN
2. Seal the suction pipe 10.04.46 27 UN
3. Sealing ring 10.04.26
36 UN
4. Sealing ring chromed 14.05.S13 R1 or R2 72 UN
5. Scrapper ring 14.05.514 R1 or R2 36 UN
6. Piston ring 14.05.517 R1 or R2 36 UN
7. Seal 10.09.09.6
50 UN
8. Diafragma to K-14A
12 UN
9. Deflector head 14.36.590 18 UN
10. Magnetos to AI-14RA 2 UN
11. Engine AI-14RA(oh, after oh or used) 1 UN
12. Spark plugs to AI-14RA 50 UN
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Wednesday, January 21, 2015 12:08 PM
Subject: Re: Yak-List: CJ engine parts
George,
I stock most all 260 and 285 hp engine parts, what are you looking for?
Doug
On Wed, Jan 21, 2015 at 6:04 AM, George S. Coy <george.coy@gmail.com>
wrote:
Hey guys, I have a client looking for AI14RA engine parts. Are the
engine parts generally available?
The Chinese CJ6 engine was a originally a license built AI14RA engine.
The Motorstar factory has disassembled several of the Chinese engines
and has found the parts identical to the AI14 engine.
George Coy
CAS Ltd.
629 Airport Rd.
Swanton VT 05488 USA
802-868-5633 off
802-363-5782 cell
802-868-4465 Fax
george.coy@gmail.com
http://coyacft.com/
SKYPE george.coy
_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
="_blank">www.mypilotstore.com
ank">www.mrrace.com
_blank">http://www.matronics.com/contribution
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
Message 11
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| Subject: | Re: Stainless Gill Vane Screws |
I still have several sets left if anyone needs them.
Thanks,
Jeff.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=437425#437425
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