Today's Message Index:
----------------------
1. 02:16 AM - Re: JabiruEngine-List Digest: 2 Msgs - 02/06/14 (Rich)
2. 08:53 AM - Re: Rough running Jab 3300 (Gary Aman)
3. 09:31 AM - Re: Rough running Jab 3300 (Clive james)
4. 09:40 AM - Re: Rough running Jab 3300 (Clive james)
5. 11:17 AM - Re: Rough running Jab 3300 (FLYaDIVE)
6. 02:28 PM - Re: Rough running Jab 3300 (n5pb@aol.com)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: JabiruEngine-List Digest: 2 Msgs - 02/06/14 |
Hello,
I not flying yet but in a conversation with another jabiru pilot, they, (2 planes,
2 jabiru's, same concern) actually reduced throw on the carb butterfly. We
are talking a small amount.
It was states that they still felt the engine was a full power but the butterfly
valve didn't quite make 100% open.
My conversation with them was carb airflow concerns I had while still building.
The concerns where stimulates from the past 8 years of listening to this forum.
That is how this subject came up.
Anyhow, may be worth a Try only using 95% butterfly movement or at least reducing
in small increments on a trial basis.
Safe flying!
- Rich
On Feb 7, 2014, at 2:02 AM, JabiruEngine-List Digest Server <jabiruengine-list@matronics.com>
wrote:
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete JabiruEngine-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 JabiruEngine-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 14-02-06&Archive=JabiruEngine
>
> Text Version:
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 14-02-06&Archive=JabiruEngine
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> JabiruEngine-List Digest Archive
> ---
> Total Messages Posted Thu 02/06/14: 2
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 11:19 PM - Rough running Jab 3300 (Gary Eady)
> 2. 11:36 PM - Re: Rough running Jab 3300 (Paul Mulwitz)
>
>
>
> ________________________________ Message 1 _____________________________________
>
>
> Time: 11:19:40 PM PST US
> From: Gary Eady <gary_eady@xtra.co.nz>
> Subject: JabiruEngine-List: Rough running Jab 3300
>
> I'm having a few issues with my Jab 3300 solid lifter engine. Intermittentl
> y, normally under load in the climb, it develops a miss in either one or ot
> her of the front cylinders. The miss/rough running only lasts between about
> 10 and 20 seconds and recurs every couple of hours or so of flying - but i
> s enough to make me look around quickly for an off field landing area.=0AHa
> ve checked the resistance and condition of the HT leads and also the coils.
> All seem to be ok.=0AThe errant cylinder is easy to track via the EGT prob
> es and is always number 1 or 2 which is suddenly about 100 degrees C cooler
> than the others.=0AThe engine has 70 hours on it and starts well hot or co
> ld - is burning no oil and throws virtually no oil into the breather bottle
> .. All engine parameters are great including cylinder head temps. Except for
> this darn miss.=0A=0AAnyone else out there having or had a similar problem
> ??=0A=0A=0ARegards=0A=0AGary=0A=0ACH701,- Jab 3300A serial number 500, 70
> hours total time. Grand Rapids EIS.
>
> ________________________________ Message 2 _____________________________________
>
>
> Time: 11:36:41 PM PST US
> From: Paul Mulwitz <psm@att.net>
> Subject: Re: JabiruEngine-List: Rough running Jab 3300
>
> Hi Gary,
>
> First let me say I am no expert on engines of any sort. So don't depend
> on my being right.
>
> I once had some strange miss-firing because the carburetor was loose.
> It was more dramatic than your story and only went bad when I reduced to
> idle power for descent.
>
> The thing that comes to mind listening to your story is you are at a
> high angle of attack. That suggests there is something about the air
> flow to the carburetor might be funny. In my plane I took extra
> measures to straighten out the air flow just in front of the
> carburetor. There are several ways to do this, and I don't really know
> if any are necessary.
>
> A 3300 is a large engine for a 701. You must get very high pitch on the
> aircraft nose when climbing. This suggests a possible problem with fuel
> pressure could be involved. Do you have a boost pump?
>
> Good luck,
>
> Paul
> Camas, WA
> Zodiac XL, Jab 3300
>
> On 2/6/2014 11:16 PM, Gary Eady wrote:
>> I'm having a few issues with my Jab 3300 solid lifter engine.
>> Intermittently, normally under load in the climb, it develops a miss
>> in either one or other of the front cylinders. The miss/rough running
>> only lasts between about 10 and 20 seconds and recurs every couple of
>> hours or so of flying - but is enough to make me look around quickly
>> for an off field landing area.
>> Have checked the resistance and condition of the HT leads and also the
>> coils. All seem to be ok.
>> The errant cylinder is easy to track via the EGT probes and is always
>> number 1 or 2 which is suddenly about 100 degrees C cooler than the
>> others.
>> The engine has 70 hours on it and starts well hot or cold - is burning
>> no oil and throws virtually no oil into the breather bottle. All
>> engine parameters are great including cylinder head temps. Except for
>> this darn miss.
>>
>> Anyone else out there having or had a similar problem??
>>
>>
>> Regards
>>
>> Gary
>>
>> CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids EIS.
>>
>> *
>>
>>
>> *
>
>
>
>
>
>
>
>
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rough running Jab 3300 |
Gary,my first thought would be carb ice.Any way of determining air temp or
humidity during these episodes?Do you have any carb heat provisions or alte
rnate air intake possibilities?
G.Aman Kolb MK3 Jabiru 900 hrs
-----Original Message-----
From: Gary Eady <gary_eady@xtra.co.nz>
Sent: Fri, Feb 7, 2014 2:19 am
Subject: JabiruEngine-List: Rough running Jab 3300
I'm having a few issues with my Jab 3300 solid lifter engine. Intermittentl
y, normally under load in the climb, it develops a miss in either one or ot
her of the front cylinders. The miss/rough running only lasts between about
10 and 20 seconds and recurs every couple of hours or so of flying - but i
s enough to make me look around quickly for an off field landing area.
Have checked the resistance and condition of the HT leads and also the coil
s. All seem to be ok.
The errant cylinder is easy to track via the EGT probes and is always numbe
r 1 or 2 which is suddenly about 100 degrees C cooler than the others.
The engine has 70 hours on it and starts well hot or cold - is burning no o
il and throws virtually no oil into the breather bottle. All engine paramet
ers are great including cylinder head temps. Except for this darn miss.
Anyone else out there having or had a similar problem??
Regards
Gary
CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids EIS.
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rough running Jab 3300 |
Does it do it if you throttle back a tad?
> On 7 Feb 2014, at 16:52, Gary Aman <zeprep251@aol.com> wrote:
>
> Gary,my first thought would be carb ice.Any way of determining air temp or
humidity during these episodes?Do you have any carb heat provisions or alte
rnate air intake possibilities?
> G.Aman Kolb MK3 Jabiru 900 hrs
>
>
> -----Original Message-----
> From: Gary Eady <gary_eady@xtra.co.nz>
> To: jabiruengine-list <jabiruengine-list@matronics.com>
> Sent: Fri, Feb 7, 2014 2:19 am
> Subject: JabiruEngine-List: Rough running Jab 3300
>
> I'm having a few issues with my Jab 3300 solid lifter engine. Intermittent
ly, normally under load in the climb, it develops a miss in either one or ot
her of the front cylinders. The miss/rough running only lasts between about 1
0 and 20 seconds and recurs every couple of hours or so of flying - but is e
nough to make me look around quickly for an off field landing area.
> Have checked the resistance and condition of the HT leads and also the coi
ls. All seem to be ok.
> The errant cylinder is easy to track via the EGT probes and is always numb
er 1 or 2 which is suddenly about 100 degrees C cooler than the others.
> The engine has 70 hours on it and starts well hot or cold - is burning no o
il and throws virtually no oil into the breather bottle. All engine paramete
rs are great including cylinder head temps. Except for this darn miss.
>
> Anyone else out there having or had a similar problem??
>
>
> Regards
>
> Gary
>
> CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids EIS
.
>
>
>
> tor?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-Lis
t
> tp://forums.matronics.com
> bution">http://www.matronics.com/contribution
>
>
>
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 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rough running Jab 3300 |
Carby ice doesn't occur at wot.....
> On 7 Feb 2014, at 16:52, Gary Aman <zeprep251@aol.com> wrote:
>
> Gary,my first thought would be carb ice.Any way of determining air temp or
humidity during these episodes?Do you have any carb heat provisions or alte
rnate air intake possibilities?
> G.Aman Kolb MK3 Jabiru 900 hrs
>
>
> -----Original Message-----
> From: Gary Eady <gary_eady@xtra.co.nz>
> To: jabiruengine-list <jabiruengine-list@matronics.com>
> Sent: Fri, Feb 7, 2014 2:19 am
> Subject: JabiruEngine-List: Rough running Jab 3300
>
> I'm having a few issues with my Jab 3300 solid lifter engine. Intermittent
ly, normally under load in the climb, it develops a miss in either one or ot
her of the front cylinders. The miss/rough running only lasts between about 1
0 and 20 seconds and recurs every couple of hours or so of flying - but is e
nough to make me look around quickly for an off field landing area.
> Have checked the resistance and condition of the HT leads and also the coi
ls. All seem to be ok.
> The errant cylinder is easy to track via the EGT probes and is always numb
er 1 or 2 which is suddenly about 100 degrees C cooler than the others.
> The engine has 70 hours on it and starts well hot or cold - is burning no o
il and throws virtually no oil into the breather bottle. All engine paramete
rs are great including cylinder head temps. Except for this darn miss.
>
> Anyone else out there having or had a similar problem??
>
>
> Regards
>
> Gary
>
> CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids EIS
.
>
>
>
> tor?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-Lis
t
> tp://forums.matronics.com
> bution">http://www.matronics.com/contribution
>
>
>
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 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rough running Jab 3300 |
Carb Ice sure can occur at WOT and even on a 70 F day.
http://flighttraining.aopa.org/students/presolo/skills/carbicing.html
On Fri, Feb 7, 2014 at 12:38 PM, Clive james <zcrj90@yahoo.co.uk> wrote:
> Carby ice doesn't occur at wot.....
>
> On 7 Feb 2014, at 16:52, Gary Aman <zeprep251@aol.com> wrote:
>
> Gary,my first thought would be carb ice.Any way of determining air temp or
> humidity during these episodes?Do you have any carb heat provisions or
> alternate air intake possibilities?
> G.Aman Kolb MK3 Jabiru 900 hrs
>
>
> -----Original Message-----
> From: Gary Eady <gary_eady@xtra.co.nz>
> To: jabiruengine-list <jabiruengine-list@matronics.com>
> Sent: Fri, Feb 7, 2014 2:19 am
> Subject: JabiruEngine-List: Rough running Jab 3300
>
> I'm having a few issues with my Jab 3300 solid lifter engine.
> Intermittently, normally under load in the climb, it develops a miss in
> either one or other of the front cylinders. The miss/rough running only
> lasts between about 10 and 20 seconds and recurs every couple of hours or
> so of flying - but is enough to make me look around quickly for an off
> field landing area.
> Have checked the resistance and condition of the HT leads and also the
> coils. All seem to be ok.
> The errant cylinder is easy to track via the EGT probes and is always
> number 1 or 2 which is suddenly about 100 degrees C cooler than the others.
> The engine has 70 hours on it and starts well hot or cold - is burning no
> oil and throws virtually no oil into the breather bottle. All engine
> parameters are great including cylinder head temps. Except for this darn
> miss.
>
> Anyone else out there having or had a similar problem??
>
>
> Regards
>
> Gary
>
> CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids
> EIS.
>
> *
>
> tor?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List <http://www.matronics.com/Navigator?JabiruEngine-List>
> tp://forums.matronics.com <http://forums.matronics.com>
> bution">http://www.matronics.com/contribution <http://www.matronics.com/contribution>
>
> *
>
>
> *
>
>
> *
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Rough running Jab 3300 |
I've experienced carb icing in Clearwater, FL the last couple of summers.
When it last happened I applied carb heat on continuously during landing an
d TAKEOFF on consecutive touch and go's. With the carb heat on I experence
d No further issues. With that in mind, I installed the electric carburato
r heat assembly that jabiru USA sells. This gave me the carb heat needed,
but did not reduce engine efficiency. so far i've not had any similiar iss
ues.
I did a write up on the installation and should be out with the next newsle
tter.
Bear
-----Original Message-----
From: FLYaDIVE <flyadive@gmail.com>
Sent: Fri, Feb 7, 2014 4:52 pm
Subject: Re: JabiruEngine-List: Rough running Jab 3300
Carb Ice sure can occur at WOT and even on a 70 F day.
http://flighttraining.aopa.org/students/presolo/skills/carbicing.html
On Fri, Feb 7, 2014 at 12:38 PM, Clive james <zcrj90@yahoo.co.uk> wrote:
Carby ice doesn't occur at wot.....
On 7 Feb 2014, at 16:52, Gary Aman <zeprep251@aol.com> wrote:
Gary,my first thought would be carb ice.Any way of determining air temp or
humidity during these episodes?Do you have any carb heat provisions or alte
rnate air intake possibilities?
G.Aman Kolb MK3 Jabiru 900 hrs
-----Original Message-----
From: Gary Eady <gary_eady@xtra.co.nz>
Sent: Fri, Feb 7, 2014 2:19 am
Subject: JabiruEngine-List: Rough running Jab 3300
I'm having a few issues with my Jab 3300 solid lifter engine. Intermittentl
y, normally under load in the climb, it develops a miss in either one or ot
her of the front cylinders. The miss/rough running only lasts between about
10 and 20 seconds and recurs every couple of hours or so of flying - but i
s enough to make me look around quickly for an off field landing area.
Have checked the resistance and condition of the HT leads and also the coil
s. All seem to be ok.
The errant cylinder is easy to track via the EGT probes and is always numbe
r 1 or 2 which is suddenly about 100 degrees C cooler than the others.
The engine has 70 hours on it and starts well hot or cold - is burning no o
il and throws virtually no oil into the breather bottle. All engine paramet
ers are great including cylinder head temps. Except for this darn miss.
Anyone else out there having or had a similar problem??
Regards
Gary
CH701, Jab 3300A serial number 500, 70 hours total time. Grand Rapids EIS.
tor?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List
tp://forums.matronics.com
bution">http://www.matronics.com/contribution
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=
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=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=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=3D=3D=3D=
3D
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|