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Rotax 582 compressions

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f.miles.tcp.833(at)clearw
Guest

Posted: Mon Oct 01, 2007 9:13 am Post subject: Rotax 582 compressions

Does anyone know what the normal compression range is for the Rotax 582?  Second question; the engine manual speaks of decarboning the engine after so many hours, are the oil injected engines as prone to carbon as the engines with the fuel and oil mixed?   

   

Frank Miles  

Klll w/ 582  

     

  10/1/2007 10:20 AM

     [quote][b]

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Mon Oct 01, 2007 9:39 am Post subject: Rotax 582 compressions

At 10:12 AM 10/1/2007, you wrote:



  	  Quote: 	
		  Does anyone know what the normal compression range is for the Rotax 582?  	


 I couldn't find a recommendation. I get 118 to 125 psi, depending on the carbon load. I just use it as a relative number anyway.



  	  Quote: 	
		  Second question; the engine manual speaks of decarboning the engine after so many hours, are the oil injected engines as prone to carbon as the engines with the fuel and oil mixed? 	


 I've never heard of a difference in all the literature I've read. Bob Robertson did, however, say that he no longer de-carbons at 50 hour intervals, waiting instead until the 150 hour rebuild. I also found  http://www.decalinchemicals.com/DeeCarb.html which I'm thinking of trying. I spoke with the developer and he had no experience with 2-strokes, but suggested it should work. (I already use his Decalin lead scavenger in my 582.)



 

 Guy Buchanan

 San Diego, CA

 K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.    [quote][b]

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Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Mon Oct 01, 2007 10:08 am Post subject: Re: Rotax 582 compressions

My  current 582 in Kitfox IV has  582 which was brand new in  June 2006 and has over 300 hours on it and NEVER been apart yet. 

I use only  API-TC rated oil and the brand is Bombardier XPS mineral oil.



My last plugs went 152 hours , here hey are here  http://www.cfisher.com/152hournkg.html



That being said, Rotax does recommend 150 hours so I maybe pushing the limit here.  Time will certainly tell. 



I also use Rotax NGK plugs which some will argue but my experience shows they do last better.    http://www.cfisher.com/ngk/



Plus the alum tips ones can cause you to blow your  5k ohm resistor caps.



Call Bob and ask him   -  his # is here  http://www.cfisher.com/ngk/    TOLL FREE -tell  him what a a dork i am for going 300 hours on my  582  <Snicker> 



Dave

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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Mon Oct 01, 2007 12:37 pm Post subject: Rotax 582 compressions

Those automotive compression  testers are the most lying consarnd things ever created.  Too many  variables to have any accuracy, starting with the cranking speed.   Differential is the only way to go only thing is if you hear air escaping it  will be through the exhaust and the intake at the same time and the only thing  it can be is the piston rings.  try to keep the cylinders above  70/80.

  

 Noel

 [quote]   

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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

C260B(at)aol.com
Guest

Posted: Mon Oct 01, 2007 1:39 pm Post subject: Rotax 582 compressions

Hey everbody,

 

 i have an almost new International 2si 460 F35 engine for sale. 3 hr TT. missing carb and exhaust.   anybody interested?    send me an offer.

 

 

 shawn

 c260b(at)aol.com 

**************************************

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