Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

912 run on

Matronics Email Lists Forum Index -> RotaxEngines-List

View previous topic :: View next topic

Author Message

egp8111

Joined: 25 Mar 2010
Posts: 49

Posted: Mon Apr 07, 2014 7:55 am Post subject: 912 run on

I was syncing the carbs  on my 912ul and tried to shut the engine down but turning off the ignition switches did absolutely nothing.  I cycled them several time but the engine kept running.   I finally shut off the fuel and waited for it to quit.  I  checked the grounding on the switches and everything was in order.  The funny thing is the switches had been working fine before and have been since this occasion.  The Rotax manual says this is possible if the engine is shut down hot but in this case the motor was barely warm..  Anyone have any ideas ?

Thanks

EG

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

n992dn(at)gmail.com
Guest

Posted: Mon Apr 07, 2014 10:46 am Post subject: 912 run on

Hi  

   

It is not possible for the engine to keep on running if the ignition switches are in the off position, and you said that you checked continuity to ground, correct?  

It is very possible that as part of the carb sync you messed up with the aluminum tube that connects the two carbs together, this tube is located very close to the electronic ignition modules and it is possible that while messing with it, you actually broke the "kill" wires leading from the ignition switches in the cockpit to the electronic modules, I would suggest checking continuity to ground starting right on the kill connection at the module location itself.  

   

Nati   RANS 6 912ULS, Illinois



On Mon, Apr 7, 2014 at 10:56 AM, egp8111 <egp8111(at)aol.com (egp8111(at)aol.com)> wrote:

 [quote]--> RotaxEngines-List message posted by: "egp8111" <egp8111(at)aol.com (egp8111(at)aol.com)>

  

 I was syncing the carbs  on my 912ul and tried to shut the engine down but turning off the ignition switches did absolutely nothing.  I cycled them several time but the engine kept running.   I finally shut off the fuel and waited for it to quit.  I  checked the grounding on the switches and everything was in order.  The funny thing is the switches had been working fine before and have been since this occasion.  The Rotax manual says this is possible if the engine is shut down hot but in this case the motor was barely warm..  Anyone have any ideas ?

  Thanks

 EG

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=421706#421706

 

 

 

 

 

 

 

 ===========

 -List" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

BARRY CHECK 6

Joined: 15 Mar 2011
Posts: 738

Posted: Mon Apr 07, 2014 11:29 am Post subject: 912 run on

EG:

 Did the engine run smooth after you shut off the ignition switches?  If so then check the grounding of your switches again.  Check further down the wiring not just at the switch to ground.

 If the engine ran rough then you could have a HOT SPOT in one or more cylinders.  A hot spot can cause run-on, dieseling, and pre-ignition.  If this is the case check the plugs first, then the area inside the cylinders where the plugs screw into.  You are LQQKing small hang-nails of metal.  These will heat up, hold the temps and fire-off a fuel air mixture.

 



Barry

 





On Mon, Apr 7, 2014 at 11:56 AM, egp8111 <egp8111(at)aol.com (egp8111(at)aol.com)> wrote:

 [quote]--> RotaxEngines-List message posted by: "egp8111" <egp8111(at)aol.com (egp8111(at)aol.com)>

  

 I was syncing the carbs  on my 912ul and tried to shut the engine down but turning off the ignition switches did absolutely nothing.  I cycled them several time but the engine kept running.   I finally shut off the fuel and waited for it to quit.  I  checked the grounding on the switches and everything was in order.  The funny thing is the switches had been working fine before and have been since this occasion.  The Rotax manual says this is possible if the engine is shut down hot but in this case the motor was barely warm..  Anyone have any ideas ?

  Thanks

 EG

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=421706#421706

 

 

 

 

 

 

 

 ===========

 -List" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Mon Apr 07, 2014 5:13 pm Post subject: Re: 912 run on

I would look at grounding at the ignition switch and up at the ignition modules  on the 6 pin connectors. White wire in the corner.

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

sonar1@cox.net

Joined: 02 Oct 2007
Posts: 55
Location: Santa Barbara, Ca

Posted: Sat Apr 12, 2014 8:42 pm Post subject: Re: 912 run on

Exact same thing happened to me about 50 engine hours ago. I tried reaching under the instrument panel to ground the switch terminals - no luck. Finally just let it run out of fuel. Next time it worked just fine, and has for over a year. Can't explain it.......Fred

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RotaxEngines-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum