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cooling the ignition coils

Matronics Email Lists Forum Index -> JabiruEngine-List

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alvie102(at)yahoo.com
Guest

Posted: Wed Feb 18, 2009 1:21 pm Post subject: cooling the ignition coils

Hi All--

While perusing the recent correspondence about cooling the ignition coils with blast tubes, another facet of cooling the coils came to mind. I recall reading some time ago somewhere about Jabiru recommending using fiberglass washers on the cooling coils to isolate them from engine block heat.  

Now I can't find anything about that on the factory website (or anywhere else, for that matter).  I also have a question about where the washers would be installed.  On the outside of the coil under the bolt head wouldn't  seem to be nearly as effective as between the coil and the engine; yet that raises the question of offsetting the alignment of the  coils with the magnets on the periphery of the  flywheel.

Thoughts, anyone?

Alvie

Sonex #102

Jab. 3300A

Ser.No. 174



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N1BZRich(at)aol.com
Guest

Posted: Wed Feb 18, 2009 1:38 pm Post subject: cooling the ignition coils

In a message dated 2/18/2009 4:22:17 P.M. Eastern Standard Time,  alvie102(at)yahoo.com writes:

  	  Quote: 	
		  between the coil and the engine 	


 

 Alvie,

     Between the coil and the engine is how my engine  came and what I have continued to use for the past 500 + hours.  The  alignment of the coil is not a problem, but of course the gap between the coil  and the magnet is critical, especially for cold weather starting. 

 Blue Skies,

 Buz Rich

 Need a job? Find an employment agency near you.

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Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Wed Feb 18, 2009 2:17 pm Post subject: cooling the ignition coils

The fibre washers are indeed fitted between the coil and the engine.  There maybe washers under the head as well, I can't recall?

 My 2200 doesn't have them where as my 3300 does, it's all about when the  engine was built. It's a good point about the alignment and although I thought  about it I haven't ever examined the difference. the washers are quite  thick. Maybe the engines with the washers fitted have a little metal  removed from the mount area so the alignment is still good. I haven't  retrofitted washers to my 2200 engine even though I heard about it. On that I  did lose a coil at 700 hours though the other of the pair has now done 1060 hrs,  neither engine has blast tubes (yet).

 Maybe some one can have a look at an engine with washers? Be simple  enough to gain some clearance.

 Regards, Clive



   From:  owner-jabiruengine-list-server(at)matronics.com  [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of Alvie  Johnson

Sent: 18 February 2009 21:21

To:  jabiruengine-list(at)matronics.com

Subject: cooling  the ignition coils

 

  Hi All--

 



 While perusing the recent correspondence about cooling the ignition coils  with blast tubes, another facet of cooling the coils came to mind. I recall  reading some time ago somewhere about Jabiru recommending using fiberglass  washers on the cooling coils to isolate them from engine block heat.   

 



 Now I can't find anything about that on the factory website (or anywhere  else, for that matter).  I also have a question about where the washers  would be installed.  On the outside of the coil under the bolt head  wouldn't  seem to be nearly as effective as between the coil and the  engine; yet that raises the question of offsetting the alignment of the   coils with the magnets on the periphery of the flywheel.

 



 Thoughts, anyone?

 



 Alvie

 Sonex #102

 Jab. 3300A

 Ser.No. 174

 



 



 

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