Today's Message Index:
----------------------
1. 05:18 AM - Re: Re: 912 rough running below 3000 rpm (Flynn Elliott)
2. 06:35 AM - Re: Re: 912 rough running below 3000 rpm (OS)
3. 07:02 AM - Re: Re: 912 rough running below 3000 rpm (OS)
4. 07:12 AM - Re: 912 rough running below 3000 rpm (Roger Lee)
5. 08:49 AM - Re: Re: 912 rough running below 3000 rpm (Flynn Elliott)
6. 08:51 AM - Re: Re: 912 rough running below 3000 rpm (Flynn Elliott)
Message 1
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| Subject: | Re: 912 rough running below 3000 rpm |
Hi Roger,
Carbs now stripped again, thoroughly cleaned out , new o rings ect.
Roughness at idle remains the same. Just for the hell of it we turned the
mixture screw in to lean the mixture, at just on 1/2 a turn out I now have a
very smooth idle ! rpm through the rest of the range is unafected.
Will I be running the motor to lean , from what info I get the mixture screw
only effects low rpm operation i.e idle.
Thanks
Flynn
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: 04 June 2015 02:32 AM
Subject: RotaxEngines-List: Re: 912 rough running below 3000 rpm
The 912UL and ULS are the same measurements. They are the same carbs just
different jetting.
When the carbs come off you must flush through every orifice and jet in the
bowl and carb body and leave no stone unturned. It only takes a very tiny
piece of debris to cause this rough running. Your symptoms do sound like you
move a piece of debris, but after it runs it moves again.
I absolutely know you don't want to hear this, but I think you missed
something on the cleaning. Every little hole and crevice needs to be flushed
then blown out with air. Blow the air in more than one direction where
possible. I have seen a few owners have difficulty here because they left
one stone unturned.
Thanks for the vote of confidence, but no "Oracle" here just an owner like
everyone else and happy to pass on what I learn in all the Rotax schools and
what I have been able to see over the years. matter of fact I just spent all
last week back at Rotax for another school.
--------
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442958#442958
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 2
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| Subject: | Re: 912 rough running below 3000 rpm |
Flynn,
There is a product called "Colortune spark plug".
You can't use them under load but it's really neat device for setting
mixtures.
I used them extensively in the distant past tuning Weber and Dell'Orto
carbs.
Among others, Amazon sells them here
http://www.amazon.com/Colortune-for-14mm-Spark-Plug/dp/B000E9VGNM
This one's a 14mm thread size.
Regards,
Otto Szorenyi
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Flynn
Elliott
Sent: Monday, June 08, 2015 08:17
Subject: RE: RotaxEngines-List: Re: 912 rough running below 3000 rpm
--> <foxflynn@worldonline.co.za>
Hi Roger,
Carbs now stripped again, thoroughly cleaned out , new o rings ect.
Roughness at idle remains the same. Just for the hell of it we turned the
mixture screw in to lean the mixture, at just on 1/2 a turn out I now have a
very smooth idle ! rpm through the rest of the range is unafected.
Will I be running the motor to lean , from what info I get the mixture screw
only effects low rpm operation i.e idle.
Thanks
Flynn
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: 04 June 2015 02:32 AM
Subject: RotaxEngines-List: Re: 912 rough running below 3000 rpm
--> <ssadiver1@yahoo.com>
The 912UL and ULS are the same measurements. They are the same carbs just
different jetting.
When the carbs come off you must flush through every orifice and jet in the
bowl and carb body and leave no stone unturned. It only takes a very tiny
piece of debris to cause this rough running. Your symptoms do sound like you
move a piece of debris, but after it runs it moves again.
I absolutely know you don't want to hear this, but I think you missed
something on the cleaning. Every little hole and crevice needs to be flushed
then blown out with air. Blow the air in more than one direction where
possible. I have seen a few owners have difficulty here because they left
one stone unturned.
Thanks for the vote of confidence, but no "Oracle" here just an owner like
everyone else and happy to pass on what I learn in all the Rotax schools and
what I have been able to see over the years. matter of fact I just spent all
last week back at Rotax for another school.
--------
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442958#442958
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 3
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| Subject: | Re: 912 rough running below 3000 rpm |
Flynn,
While looking around on the Net I also found this interesting looking toy
that might interest you.
http://www.americanmuscle.com/plx-dm6-afr-sensor-module-combo.html
Otto S.
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Flynn
Elliott
Sent: Monday, June 08, 2015 08:17
Subject: RE: RotaxEngines-List: Re: 912 rough running below 3000 rpm
--> <foxflynn@worldonline.co.za>
Hi Roger,
Carbs now stripped again, thoroughly cleaned out , new o rings ect.
Roughness at idle remains the same. Just for the hell of it we turned the
mixture screw in to lean the mixture, at just on 1/2 a turn out I now have a
very smooth idle ! rpm through the rest of the range is unafected.
Will I be running the motor to lean , from what info I get the mixture screw
only effects low rpm operation i.e idle.
Thanks
Flynn
Message 4
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| Subject: | Re: 912 rough running below 3000 rpm |
Hi Flynn,
The mixture screw is more for the low rpm.
When you cleaned the carbs did you remove the mixture screw on the bottom and blow
through this orifice? Did you remove or at least blow through the mixture
jet located in the corner of the bowl in both directions?
Is the mixture screw now out 1.5 turns and was it when all this started?
If you put a set of carb sync gauges on do the carbs sync at idle or is one carb
considerably off over the other?
--------
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443218#443218
Message 5
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| Subject: | Re: 912 rough running below 3000 rpm |
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: 08 June 2015 04:12 PM
Subject: RotaxEngines-List: Re: 912 rough running below 3000 rpm
Hi Flynn,
The mixture screw is more for the low rpm.
When you cleaned the carbs did you remove the mixture screw on the bottom
and blow through this orifice?
Yes
Did you remove or at least blow through the mixture jet located in the
corner of the bowl in both directions?
Yes,removed and pumped fuel and air from both ends.
Is the mixture screw now out 1.5 turns and was it when all this started?
No, just .5 out at the moment to get smooth idle, at 1 .5 idle is rough.
Setting was 1.5 before this started, prior to this issue they have never
been touched.
If you put a set of carb sync gauges on do the carbs sync at idle or is one
carb considerably off over the other?
Carb sync gauges are on the way to me, should have them in a few days.
Thanks
Flynn
--------
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443218#443218
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 6
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| Subject: | Re: 912 rough running below 3000 rpm |
Thanks Otto.
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of OS
Sent: 08 June 2015 04:01 PM
Subject: RE: RotaxEngines-List: Re: 912 rough running below 3000 rpm
Flynn,
While looking around on the Net I also found this interesting looking toy
that might interest you.
http://www.americanmuscle.com/plx-dm6-afr-sensor-module-combo.html
Otto S.
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Flynn
Elliott
Sent: Monday, June 08, 2015 08:17
Subject: RE: RotaxEngines-List: Re: 912 rough running below 3000 rpm
--> <foxflynn@worldonline.co.za>
Hi Roger,
Carbs now stripped again, thoroughly cleaned out , new o rings ect.
Roughness at idle remains the same. Just for the hell of it we turned the
mixture screw in to lean the mixture, at just on 1/2 a turn out I now have a
very smooth idle ! rpm through the rest of the range is unafected.
Will I be running the motor to lean , from what info I get the mixture screw
only effects low rpm operation i.e idle.
Thanks
Flynn
-----
No virus found in this message.
Checked by AVG - www.avg.com
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