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Rotax rubber carb flanges

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nwcmc(at)tiscali.co.uk
Guest

Posted: Wed Feb 14, 2007 5:36 am Post subject: Rotax rubber carb flanges

Anyone with a Rotax engine over 5 years old should be considering changing the rubber carb flanges as they have been known to split with age. The cost of these from Rotax is rather excessive at over £50 each. Aerosport UK sell the Mikuni version (which are effectively identical) for under £24. They also come with the spacer tube preventing overtightening.   

   

Refer to website page http://www.aerosportuk.com/acatalog/Aerosport_Shop_Carburettor_Flange_37.html.#  

   

Nigel Charles  

        [quote][b]

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alan(at)kestrel-insurance
Guest

Posted: Wed Feb 14, 2007 6:34 am Post subject: Rotax rubber carb flanges

Nigel is correct about changing the rubber flanges. Just a point on that subject, the new ones don’t come with the metal insert as it is not required on the new type flange, so don’t transfer it over to the flange when fitting.  

   

Alan  

         

  

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of nigel charles

 Sent: 14 February 2007 13:34

 To: europa-list(at)matronics.com

 Subject: Rotax rubber carb flanges  

  

   

Anyone with a Rotax engine over 5 years old should be considering changing the rubber carb flanges as they have been known to split with age. The cost of these from Rotax is rather excessive at over £50 each. Aerosport UK sell the Mikuni version (which are effectively identical) for under £24. They also come with the spacer tube preventing overtightening.   

   

Refer to website page http://www.aerosportuk.com/acatalog/Aerosport_Shop_Carburettor_Flange_37.html.#  

   

Nigel Charles   	  Quote: 	
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     --  Release Date: 14/02/2007 07:54 

  

--

 14/02/2007 07:54

     [quote][b]

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ami(at)mcfadyean.freeserv
Guest

Posted: Thu Feb 15, 2007 1:03 am Post subject: Rotax rubber carb flanges

Are the cheaper versions Kevlar reinforced (as are  the Rota replacement versions)?

  

 Duncan McF.

 [quote]   ---

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nwcmc(at)tiscali.co.uk
Guest

Posted: Fri Feb 16, 2007 6:10 am Post subject: Rotax rubber carb flanges

 	  Quote: 	
		  Are the cheaper versions Kevlar reinforced (as are the Rota replacement versions)?<  

   
	


   

You can find out by asking Aerosport at 'tech(at)aerosportuk.com'.  

   

Nigel Charles  

  [quote] [b]

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nwcmc(at)tiscali.co.uk
Guest

Posted: Mon Feb 19, 2007 11:21 am Post subject: Rotax rubber carb flanges

Having followed up the aspects of choice of Rotax versus Mikuni carb flanges it seems that Aerosport are getting excessive amounts of email traffic with regard to technical enquiries. Aerosport have made it clear that they do not recommend the Mikuni over the Rotax flange. They supply the Rotax carb  flange & offer the Mikuni as an alternative both of which are new stock. It is up to individual owners to decide which product to buy.   

    

   

    

As far as record of failures are concerned they can only speak for the C42. They have had no reported failures of the carb rubbers.  

    

Most of the 912 carb rubbers they sell seem to be for flexwing aircraft ie. 'Pegasus Quik'. This indicates that the particular application has at least some bearing on the failure.The particular failure they were able to examine was from an 'Airbourne Australia XT912' and this was a genuine Rotax part which had completely sheered off.  

   

               

    

 If anyone comes up with any further useful information on this subject I would be interested to hear about it. Suffice to say that whichever make of flange is used, correct engine installation is very important to avoid putting these flanges under undue stress.  

   

   

            Nigel Charles  

  

       [quote][b]

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ami(at)mcfadyean.freeserv
Guest

Posted: Mon Feb 19, 2007 2:51 pm Post subject: Rotax rubber carb flanges

I did. And they don't know.

 Given that  Rotax don't appear to be  too parochial about where it sources its components (including Japan), if  it could get the flanges from Mikuni at half the price then I suspect it  would.

 Yer pays yer money and yer takes yer  choice!

  

 Duncan Mcf.

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