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Rotax 912 Carburator Sockets Problem

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Turbo_Boss

Joined: 14 Jul 2009
Posts: 10
Location: Panama Rep. of Panama - Central America

Posted: Mon Jul 26, 2010 8:32 pm Post subject: Rotax 912 Carburator Sockets Problem

Hello guys,



I have problem with the Rotax 912 carburator sockets were the rubber get separated from the steel insert part.



In my club, almost everybody with 912 engines, has exactly the same problem with these carburator sockets showing the same type problem.



Please look at the pics. My 912 is like 18 months old and it only have 52 hours of use and this part have fail. Also, you will see a white powder. I dont know what is that.



Also, I was checking the net and found this company that produce 912 socket carburators in USA and they say they are better than the Rotax ones.



http://jbmindustries.com/ 



Have any one have try these JBM 912 carburator sockets? Are they better?



THX,



Isaac

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rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Tue Jul 27, 2010 12:03 am Post subject: Rotax 912 Carburator Sockets Problem

The white powder is probably the result of corrosion of the aluminum, i.e. aluminum oxide. I've not seen this type of separation of carb sockets before, the usual failure is cracks in the interior of the socket that causes air leaks and can destroy the engine.  There was a bad batch of sockets produced a few years ago that were fitted to both the 912 and the HKS engines. I replaced mine with the JBM units and have seen no cracking since, although inspection and replacement of the carb sockets is a regular maintenance item checked off at 100 hour and annual conditional inspections.

 



Rick Girard



On Mon, Jul 26, 2010 at 11:32 PM, Turbo_Boss <turbo_boss(at)cwpanama.net (turbo_boss(at)cwpanama.net)> wrote:

[quote] --> RotaxEngines-List message posted by: "Turbo_Boss" <turbo_boss(at)cwpanama.net (turbo_boss(at)cwpanama.net)>

 

 Hello guys,

 

 I have problem with the Rotax 912 carburator sockets were the rubber get separated from the steel insert part.

 

 In my club, almost everybody with 912 engines, has exactly the same problem with these carburator sockets showing the same type problem.

 

 Please look at the pics. My 912 is like 18 months old and it only have 52 hours of use and this part have fail. Also, you will see a white powder. I dont know what is that.

 

 Also, I was checking the net and found this company that produce 912 socket carburators in USA and they say they are better than the Rotax ones.

 

 http://jbmindustries.com/

 

 Have any one have try these JBM 912 carburator sockets? Are they better?

 

 THX,

 

 Isaac

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=306411#306411

 

 

 

 

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 http://forums.matronics.com//files/rotax912carburatorsocket_a_759.jpg

 http://forums.matronics.com//files/rotax912carburator_socket_2_177.jpg

 http://forums.matronics.com//files/rotax912carburator_socket_1_376.jpg

 

 

 

 

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ricklach

Joined: 20 Jun 2006
Posts: 127
Location: Kernville, Calif.

Posted: Tue Jul 27, 2010 6:53 am Post subject: Re: Rotax 912 Carburator Sockets Problem

I have used the JBM Industries sockets with great success and cost savings on more than one 912/914 engine. I think they are as good as, or better than, the ones sold through Rotax at twice the price.  BUT, looking at your pictures the real problem is moisture. Everything has a layer of corrosion on it. Your environment seams to have a lot of moisture and that is the problem. It looks like you will be replacing the carb sockets and probably other items as a regular scheduled maintenance requirement.  



Rick

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Roger Lee

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

Posted: Tue Jul 27, 2010 9:31 am Post subject: Re: Rotax 912 Carburator Sockets Problem

I agree with both these gentlemen. 

This is corrosion and most likely from water or a very high humidity area. Once it starts this process the rubber will come away from the metal. If you live in a high moisture environment I would spray down a large part of my engine and exposed parts (metal and rubber) with Boeing T-9 (my first choice as it is a more dry application) and Corrosion -X is my second choice (a little wetter after it is applied). These will block out the rain or moisture.

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Turbo_Boss

Joined: 14 Jul 2009
Posts: 10
Location: Panama Rep. of Panama - Central America

Posted: Tue Jul 27, 2010 10:11 am Post subject: Re: Rotax 912 Carburator Sockets Problem

Thank you all for your replys.  Well I live in Panama Republic of Panama, Central America.  Here the humidity is almost 100%    This is like living on the middle of a rainforest.



I will follow your advises and use Corrosion-X or similar product to spray around that parts after I use my UL.  



I will advise my other friends to do the same.



I Hope this cure this problemo.



Thx,



Isaac

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