Today's Message Index:
----------------------
1. 09:12 AM - 912 rough running below 3000 rpm (flynn elliott)
2. 09:25 AM - Re: 912 rough running below 3000 rpm (John Hauck)
3. 11:20 AM - Re: 912 rough running below 3000 rpm (Flynn Elliott)
4. 11:57 AM - Re: 912 rough running below 3000 rpm (John Hauck)
5. 12:46 PM - Re: 912 rough running below 3000 rpm (Flynn Elliott)
6. 03:21 PM - Idle jet clogged (Roger Lee)
7. 03:23 PM - Re: 912 rough running below 3000 rpm (Roger Lee)
8. 03:35 PM - Re: 912 rough running below 3000 rpm (John Hauck)
9. 10:32 PM - Re: Re: 912 rough running below 3000 rpm (Flynn Elliott)
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| Subject: | 912 rough running below 3000 rpm |
Hi Guys, could really use some help with a 912s.
After leaving my Foxbat for two months , she started up just fine as usual but
ran as rough as hell untill 3000rpm and up where the motor runs smooth as silk.
As always the fuel had been drained and fresh put in after the layup. We have since
cleaned the carbs, put new float bowl gaskets, a fresh set of plugs and had
my A P balance the carbs, which were real close anyway.
The start up is instant as always has been, the mag drop is inconsistant, sometimes
between 100 and 200 and very rough below below 3000rpm yet back to its usual
50rpm drop above.
Original plugs went back in and gave the same result.
I flew for half an hour yesterday in the hope of clearing the problem but no way,
as I closed the throttle for landing we were back to a very rough motor.
Any help would be more than appreciated.
Thanks
Flynn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442457#442457
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| Subject: | 912 rough running below 3000 rpm |
Insure both idle jets are completely open.
Over the years I have discovered a rough or no run 912ULS below 3000 rpm is
idle jet related.
Idle jet is extremely small. A tiny bit of trash makes a lot of difference
on fuel flow.
For what it is worth.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of flynn
elliott
Sent: Friday, May 22, 2015 11:12 AM
Subject: RotaxEngines-List: 912 rough running below 3000 rpm
<foxflynn@worldonline.co.za>
Hi Guys, could really use some help with a 912s.
After leaving my Foxbat for two months , she started up just fine as usual
but ran as rough as hell untill 3000rpm and up where the motor runs smooth
as silk.
As always the fuel had been drained and fresh put in after the layup. We
have since cleaned the carbs, put new float bowl gaskets, a fresh set of
plugs and had my A P balance the carbs, which were real close anyway.
The start up is instant as always has been, the mag drop is inconsistant,
sometimes between 100 and 200 and very rough below below 3000rpm yet back
to its usual 50rpm drop above.
Original plugs went back in and gave the same result.
I flew for half an hour yesterday in the hope of clearing the problem but no
way, as I closed the throttle for landing we were back to a very rough
motor.
Any help would be more than appreciated.
Thanks
Flynn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442457#442457
Message 3
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| Subject: | 912 rough running below 3000 rpm |
Thanks John, will pull them out and double check Again .
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of John
Hauck
Sent: 22 May 2015 06:25 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <jhauck@elmore.rr.com>
Insure both idle jets are completely open.
Over the years I have discovered a rough or no run 912ULS below 3000 rpm is
idle jet related.
Idle jet is extremely small. A tiny bit of trash makes a lot of difference
on fuel flow.
For what it is worth.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of flynn
elliott
Sent: Friday, May 22, 2015 11:12 AM
Subject: RotaxEngines-List: 912 rough running below 3000 rpm
<foxflynn@worldonline.co.za>
Hi Guys, could really use some help with a 912s.
After leaving my Foxbat for two months , she started up just fine as usual
but ran as rough as hell untill 3000rpm and up where the motor runs smooth
as silk.
As always the fuel had been drained and fresh put in after the layup. We
have since cleaned the carbs, put new float bowl gaskets, a fresh set of
plugs and had my A P balance the carbs, which were real close anyway.
The start up is instant as always has been, the mag drop is inconsistant,
sometimes between 100 and 200 and very rough below below 3000rpm yet back
to its usual 50rpm drop above.
Original plugs went back in and gave the same result.
I flew for half an hour yesterday in the hope of clearing the problem but no
way, as I closed the throttle for landing we were back to a very rough
motor.
Any help would be more than appreciated.
Thanks
Flynn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442457#442457
-----
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Checked by AVG - www.avg.com
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| Subject: | 912 rough running below 3000 rpm |
I run a single strand copper wire through them to insure they are clean.
Copper won't scratch the jet.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Flynn
Elliott
Sent: Friday, May 22, 2015 1:19 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <foxflynn@worldonline.co.za>
Thanks John, will pull them out and double check Again .
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of John
Hauck
Sent: 22 May 2015 06:25 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <jhauck@elmore.rr.com>
Insure both idle jets are completely open.
Over the years I have discovered a rough or no run 912ULS below 3000 rpm is
idle jet related.
Idle jet is extremely small. A tiny bit of trash makes a lot of difference
on fuel flow.
For what it is worth.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of flynn
elliott
Sent: Friday, May 22, 2015 11:12 AM
Subject: RotaxEngines-List: 912 rough running below 3000 rpm
<foxflynn@worldonline.co.za>
Hi Guys, could really use some help with a 912s.
After leaving my Foxbat for two months , she started up just fine as usual
but ran as rough as hell untill 3000rpm and up where the motor runs smooth
as silk.
As always the fuel had been drained and fresh put in after the layup. We
have since cleaned the carbs, put new float bowl gaskets, a fresh set of
plugs and had my A P balance the carbs, which were real close anyway.
The start up is instant as always has been, the mag drop is inconsistant,
sometimes between 100 and 200 and very rough below below 3000rpm yet back
to its usual 50rpm drop above.
Original plugs went back in and gave the same result.
I flew for half an hour yesterday in the hope of clearing the problem but no
way, as I closed the throttle for landing we were back to a very rough
motor.
Any help would be more than appreciated.
Thanks
Flynn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442457#442457
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 5
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| Subject: | 912 rough running below 3000 rpm |
Good thought John
Thanks
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of John
Hauck
Sent: 22 May 2015 08:57 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <jhauck@elmore.rr.com>
I run a single strand copper wire through them to insure they are clean.
Copper won't scratch the jet.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Flynn
Elliott
Sent: Friday, May 22, 2015 1:19 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <foxflynn@worldonline.co.za>
Thanks John, will pull them out and double check Again .
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of John
Hauck
Sent: 22 May 2015 06:25 PM
Subject: RE: RotaxEngines-List: 912 rough running below 3000 rpm
--> <jhauck@elmore.rr.com>
Insure both idle jets are completely open.
Over the years I have discovered a rough or no run 912ULS below 3000 rpm is
idle jet related.
Idle jet is extremely small. A tiny bit of trash makes a lot of difference
on fuel flow.
For what it is worth.
john h
mkIII
Titus, Alabama
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of flynn
elliott
Sent: Friday, May 22, 2015 11:12 AM
Subject: RotaxEngines-List: 912 rough running below 3000 rpm
<foxflynn@worldonline.co.za>
Hi Guys, could really use some help with a 912s.
After leaving my Foxbat for two months , she started up just fine as usual
but ran as rough as hell untill 3000rpm and up where the motor runs smooth
as silk.
As always the fuel had been drained and fresh put in after the layup. We
have since cleaned the carbs, put new float bowl gaskets, a fresh set of
plugs and had my A P balance the carbs, which were real close anyway.
The start up is instant as always has been, the mag drop is inconsistant,
sometimes between 100 and 200 and very rough below below 3000rpm yet back
to its usual 50rpm drop above.
Original plugs went back in and gave the same result.
I flew for half an hour yesterday in the hope of clearing the problem but no
way, as I closed the throttle for landing we were back to a very rough
motor.
Any help would be more than appreciated.
Thanks
Flynn
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442457#442457
-----
No virus found in this message.
Checked by AVG - www.avg.com
-----
No virus found in this message.
Checked by AVG - www.avg.com
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| Subject: | Idle jet clogged |
I agree. Pull the idle jet and run a small strand of copper wire through the extremely
tiny hole in the center. You may need to do the same with the mixture
orifice located in the corner of the bowl.
--------
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=442464#442464
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| Subject: | Re: 912 rough running below 3000 rpm |
I agree. Pull the idle jet and run a small strand of copper wire through the extremely
tiny hole in the center. You may need to do the same with the mixture
orifice located in the corner of the bowl.
--------
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=442465#442465
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| Subject: | Re: 912 rough running below 3000 rpm |
Roger, I always called that the "enricher jet" in the "enricher well". Have no
idea what the correct nomenclature of them are.
I iced up the idle jets on my 912ULS in 2000 going in to Toad River, BC. Engine
quite as soon as it went through 3,000 rpm. Would start and run normal above
3,000, but not below it. Went across the Alaska Highway, got a cup of coffee,
came back and the engine idled like a sewing machine. Conditions were conducive
to icing. Learned then that 912's don't like the idle jet to be out of
tune.
--------
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=442467#442467
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| Subject: | Re: 912 rough running below 3000 rpm |
Thanks Roger, as soon as I can escape from work I will do just that and give
feed back.
Flynn
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: 23 May 2015 12:23 AM
Subject: RotaxEngines-List: Re: 912 rough running below 3000 rpm
I agree. Pull the idle jet and run a small strand of copper wire through the
extremely tiny hole in the center. You may need to do the same with the
mixture orifice located in the corner of the bowl.
--------
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=442465#442465
-----
No virus found in this message.
Checked by AVG - www.avg.com
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