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Rich L

Joined: 23 Feb 2008
Posts: 63
Location: North Idaho

Posted: Sat Feb 23, 2008 3:49 am Post subject: Finally

 My problem with my 912uls mag drop is finally fixed.  The Rotax specs say the mag drop should not be over 300 with 120 difference.  Mine has been over 400 since day one and I have tried almost everything.  Sent queries out to numerous sites asking for a fix and nobody came up with anything worthwhile till I went to rotaxservice.com troubleshooting sight which listed about 10 things it could be.  I have tried each one for the past months but didn't do the ignition because I couldn't see it with the engine mounted.  Today I used an inspection mirror and set the spacing on the trigger coils which make up the ignition system.  My mag drop is now 110 per side and 10 difference.  I went flying tonight and the EGT's, CHT's are all even and the engine is even smoother.  My S-7 still takes off in 150 feet and the RPM is about the same. Life is good

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dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sun Feb 24, 2008 4:20 am Post subject: Re: Finally

 	  Quote: 	
		  My S-7 still takes off in 150 feet and the RPM is about the same. Life is good

	




Yes my 582  will take off the same or less. I find it very comical to read about the splitting of hairs on deciding what colour of paint is the lightest.

How about talking why you cannot take off in 150 feet?   LOL

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_________________
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wingnut

Joined: 11 Jan 2006
Posts: 356

Posted: Mon Feb 25, 2008 10:24 am Post subject: Re: Finally

 	  Quote: 	
		   I have tried each one for the past months but didn't do the ignition because I couldn't see it with the engine mounted. Today I used an inspection mirror and set the spacing on the trigger coils which make up the ignition system. My mag drop is now 110 per side and 10 difference. 	




Interesting. My 912UL drops 250 which always seemed marginal to me. Could you elaborate a little on the process you're describing? Any idea where I can read up on it?

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_________________
Luis Rodriguez
Model IV 1200
Rotax 912UL
Flying Weekly
Laurens, SC (34A)

Rich L

Joined: 23 Feb 2008
Posts: 63
Location: North Idaho

Posted: Mon Feb 25, 2008 2:53 pm Post subject: Re: Finally

Hi,



I found the possible fixes at this site.

http://www.rotaxservice.com/rotax_tips/rotax_troubleshooting.htm



Then the Rotax Heavy maintenance Manual on trigger coils had the rest of the information.  You can download the manuals here also.



good luck

Rich

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