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Hard start 912ULS

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johnelling

Joined: 23 Feb 2013
Posts: 18

Posted: Sun May 26, 2013 7:03 pm Post subject: Hard start 912ULS

Starting my 912 has been increasingly difficult.  it seems as if the starter has a hard time turning over the engine (it is a high-torque version).  I thought it was a weak battery but the problem persists even if I add battery capacity.  



The last two attempts it sounds like the Bendix is not engaging much at all.  Just a gear grinding sound and no prop turns.  



I suspect the starter motor.  Anyone have another idea of something at which I should be looking and/or testing?

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joeing701(at)simnet.is
Guest

Posted: Mon May 27, 2013 2:06 am Post subject: Hard start 912ULS

Hello John.



I had the same experience with my 912 UL starting. It turned out to be the starter like you suspect. Just to make sure, remove the starter and open it up. You will see some burned wire windings. This could happen if you let the started turn for too long.

I replaced the starter with the "heavy duty" starter and everything has been working great since.

Hope this helps,



Johann G.

Iceland.

Zenith 701.

 

On 27.5.2013, at 03:04, johnelling wrote:



 	  Quote: 	
		   

 

 Starting my 912 has been increasingly difficult.  it seems as if the starter has a hard time turning over the engine (it is a high-torque version).  I thought it was a weak battery but the problem persists even if I add battery capacity.  

 

 The last two attempts it sounds like the Bendix is not engaging much at all.  Just a gear grinding sound and no prop turns.  

 

 I suspect the starter motor.  Anyone have another idea of something at which I should be looking and/or testing?

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=401401#401401

- 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

mortweaver(at)sbcglobal.n
Guest

Posted: Mon May 27, 2013 3:32 am Post subject: Hard start 912ULS

I would highly recomend Sky Tech as a source for your starter.  They advertise lower cost, lower current draw, higher torque and lighter weight.  I am very pleased with my Sky Tech starter upgrade which was done to improve winter time engine start-up.

 Dave Weaver N912GR



--- On Mon, 5/27/13, Jóhann Jóhannsson <joeing701(at)simnet.is> wrote:



  	  Quote: 	
		  

From: Jóhann Jóhannsson <joeing701(at)simnet.is>

Subject: Re: Hard start 912ULS

To: rotaxengines-list(at)matronics.com

Date: Monday, May 27, 2013, 5:06 AM



 --> RotaxEngines-List message posted by: =?iso-8859-1?Q?J=F3hann_J=F3hannsson?= <joeing701(at)simnet.is (joeing701(at)simnet.is)>



Hello John.



I had the same experience with my 912 UL starting. It turned out to be the starter like you suspect. Just to make sure, remove the starter and open it up. You will see some burned wire windings. This could happen if you let the started turn for too long.

I replaced the starter with the "heavy duty" starter and everything has been working great since.

Hope this helps,



Johann G.

Iceland.

Zenith 701.



On 27.5.2013, at 03:04, johnelling wrote:



 	  Quote: 	
		   --> RotaxEngines-List message posted by: "johnelling" <jelling(at)newmexico.com (jelling(at)newmexico.com)>

 

 Starting my 912 has been increasingly difficult.  it seems as if the starter has a hard time turning over the engine (it is a high-torque version).  I thought it was a weak battery but the problem persists even if I add battery capacity.  

 

 The last two attempts it sounds like the Bendix is not engaging much at all.  Just a gear grinding sound and no prop turns.  

 

 I suspect the starter motor.  Anyone have another idea of something at which I should be looking and/or testing?

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=401401#401401

 

 

 

 

 

 

 

 

 

 ?RotaxEngines-List" target=_blank>http://www.matronics.com/Navigator?Rotasp;              - MATRONICS WEB FO/" ;               -Matt Dralle, List Admin==========


	




	
 [quote][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:

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hgmckay

Joined: 23 May 2006
Posts: 397

Posted: Mon May 27, 2013 4:00 am Post subject: Hard start 912ULS

Dave,

  

 Is the Sky Tech firm you recommend located at the Rock Hill airport in  SC?

  

 Hugh G.  McKay III, P.E.

Senior Consultant

Worldwide Engineering Inc.

4090 North  NC Hwy. 16

Denver, NC 28037



Ph. 704-661-8271

Fax  704-483-5466

email hgmckay(at)bellsouth.net

http://www.wwegeo.com

    

  From: David Weaver (mortweaver(at)sbcglobal.net) 

 Sent: Monday, May 27, 2013 7:31 AM

 To: rotaxengines-list(at)matronics.com (rotaxengines-list(at)matronics.com)  

 Subject: Re: Hard start 912ULS

  



                    I would highly recomend Sky Tech as a source for your starter.         They advertise lower cost, lower current draw, higher torque and lighter        weight.  I am very pleased with my Sky Tech starter upgrade which was        done to improve winter time engine start-up.

       Dave Weaver N912GR



--- On Mon, 5/27/13, Jóhann Jóhannsson        <joeing701(at)simnet.is> wrote:



        	  Quote: 	
		  

From:          Jóhann Jóhannsson <joeing701(at)simnet.is>

Subject: Re:          Hard start 912ULS

To:          rotaxengines-list(at)matronics.com

Date: Monday, May 27, 2013, 5:06          AM



         --> RotaxEngines-List message posted by:          =?iso-8859-1?Q?J=F3hann_J=F3hannsson?= <joeing701(at)simnet.is (joeing701(at)simnet.is)>



Hello          John.



I had the same experience with my 912 UL starting. It          turned out to be the starter like you suspect. Just to make sure, remove          the starter and open it up. You will see some burned wire windings. This          could happen if you let the started turn for too long.

I replaced the          starter with the "heavy duty" starter and everything has been working          great since.

Hope this helps,



Johann G.

Iceland.

Zenith          701.



On 27.5.2013, at 03:04, johnelling wrote:



 	  Quote: 	
		   -->          RotaxEngines-List message posted by: "johnelling" <jelling(at)newmexico.com (jelling(at)newmexico.com)>

          

 Starting my 912 has been increasingly difficult.  it seems          as if the starter has a hard time turning over the engine (it is a          high-torque version).  I thought it was a weak battery but the          problem persists even if I add battery capacity.  

 

          The last two attempts it sounds like the Bendix is not engaging much at          all.  Just a gear grinding sound and no prop turns.  

          

 I suspect the starter motor.  Anyone have another idea of          something at which I should be looking and/or testing?

 

          

 

 

 Read this topic online here:

 

          http://forums.matronics.com/viewtopic.php?p=401401#401401

          

 

 

 

 

 

 

 

          

 ?RotaxEngines-List"          target=_blank>http://www.matronics.com/Navigator?Rotasp;                       - MATRONICS WEB FO/"          ;                        -Matt Dralle, List    Admin==========


	




	
[quote]



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

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[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

mortweaver(at)sbcglobal.n
Guest

Posted: Mon May 27, 2013 5:31 am Post subject: Hard start 912ULS

I ordered my Sky Tech starter through Air Spruce.  I do not know where the compay is located but use of on-line search engine will disclose that.  My 912-UL engine cranks like it is on steroids.

 Dave Weaver



--- On Mon, 5/27/13, Hugh McKay <hgmckay(at)bellsouth.net> wrote:



  	  Quote: 	
		  

From: Hugh McKay <hgmckay(at)bellsouth.net>

Subject: Re: Hard start 912ULS

To: rotaxengines-list(at)matronics.com

Date: Monday, May 27, 2013, 7:00 AM



     Dave,

  

 Is the Sky Tech firm you recommend located at the Rock Hill airport in SC?

  

 Hugh G. McKay III, P.E.

Senior Consultant

Worldwide Engineering Inc.

4090 North NC Hwy. 16

Denver, NC 28037



Ph. 704-661-8271

Fax 704-483-5466

email hgmckay(at)bellsouth.net

http://www.wwegeo.com

    

  From: David Weaver (mortweaver(at)sbcglobal.net) 

 Sent: Monday, May 27, 2013 7:31 AM

 To: rotaxengines-list(at)matronics.com (rotaxengines-list(at)matronics.com) 

 Subject: Re: Hard start 912ULS

  



      I would highly recomend Sky Tech as a source for your starter.  They advertise lower cost, lower current draw, higher torque and lighter weight.  I am very pleased with my Sky Tech starter upgrade which was done to improve winter time engine start-up.

 Dave Weaver N912GR



--- On Mon, 5/27/13, Jóhann Jóhannsson <joeing701(at)simnet.is> wrote:



  	  Quote: 	
		  

From: Jóhann Jóhannsson <joeing701(at)simnet.is>

Subject: Re: Hard start 912ULS

To: rotaxengines-list(at)matronics.com

Date: Monday, May 27, 2013, 5:06 AM



 --> RotaxEngines-List message posted by: =?iso-8859-1?Q?J=F3hann_J=F3hannsson?= <joeing701(at)simnet.is>



Hello John.



I had the same experience with my 912 UL starting. It turned out to be the starter like you suspect. Just to make sure, remove the starter and open it up. You will see some burned wire windings. This could happen if you let the started turn for too long.

I replaced the starter with the "heavy duty" starter and everything has been working great since.

Hope this helps,



Johann G.

Iceland.

Zenith 701.



On 27.5.2013, at 03:04, johnelling wrote:



 	  Quote: 	
		   --> RotaxEngines-List message posted by: "johnelling" <jelling(at)newmexico.com>

  

 Starting my 912 has been increasingly difficult.  it seems as if the starter has a hard time turning over the engine (it is a high-torque version).  I thought it was a weak battery but the problem persists even if I add battery capacity.  

 

 The last two attempts it sounds like the Bendix is not engaging much at all.  Just a gear grinding sound and no prop turns.  

 

 I suspect the starter motor.  Anyone have another idea of something at which I should be looking and/or testing?

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=401401#401401

 

 

 

 

 

 

 

 

 

 ?RotaxEngines-List"  target=_blank>http://www.matronics.com/Navigator?Rotasp;              - MATRONICS WEB FO/" ;               -Matt Dralle, List Admin==========


	




	
 	  Quote: 	
		  



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

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





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

et=_blank>http://forums.matronics.com

llow target=_blank>http://www.matronics.com/contribution



	




	
 [quote][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:

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bob(at)fly-ul.com
Guest

Posted: Mon May 27, 2013 5:52 am Post subject: Hard start 912ULS

On 06:31 AM 5/27/2013, David Weaver wrote:

 	  Quote: 	
		  I ordered my Sky Tech starter through Air Spruce.  I do not know where the compay is located but use of on-line search engine will disclose that.  My 912-UL engine cranks like it is on steroids.


	


http://www.skytecair.com/LSA.htm



--

Bob Comperini

e-mail: bob(at)fly-ul.com

WWW: http://www.fly-ul.com

- 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:

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Roger Lee

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

Posted: Mon May 27, 2013 6:29 am Post subject: Re: Hard start 912ULS

The other item that would help is what year engine Mfg is this and its hours? Did you actually try a new battery? Does it sound like the starter whirls, but the engine kind of lags behing or stops turning even when the starter is still turning.



If the starter is turning fine then it is your sprag clutch associated with the starter and engine start. If people ever get kick back or turn their props backward it will trash the sprag clutch. The higher torque Rotax starter is gold in color and the older style is black. The black one isn't bad for the UL, but the ULS should have the high torque gold one. Changing the sprag will will encompass removal of the electrical end assembly.



Go to the illustrated parts manual and look at the starter assembly page to see the sprag.

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

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