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912 rough running below 3000 rpm912 rough running below 3

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Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Sun May 24, 2015 4:01 am Post subject: 912 rough running below 3000 rpm912 rough running below 3

Flynn,

  I had that problem once and finally narrowed it down to the carb operating cables. One would stick during throttle reduction causing an imbalance. I replaced the cables and problem solved. I tried to lube them first but that didn't work well.

 Just another idea.

                   Dick Maddux

                   912UL

 [quote][b]

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Roger Lee

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

Posted: Sun May 24, 2015 5:32 am Post subject: Re: 912 rough running below 3000 rpm912 rough running below

Hi Dick,



You're right and one thing we never seem to think about very often on the up front side of an issue. Cables on engines that are getting older or live in humid climates can get a little sticky. Just a little bit of friction from rust, corrosion or even just a slightly bent cable will cause carb unbalance.

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Tucson, Az.
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vernon11

Joined: 03 Aug 2010
Posts: 14

Posted: Sun May 24, 2015 7:13 am Post subject: 912 rough running below 3000 rpm912 rough running below 3

Although it did not show up during the balancing,  it is worthwhile looking at it again.

 Vernon

  



  From: Catz631(at)aol.com (Catz631(at)aol.com) 

 Sent: Sunday, May 24, 2015 2:00 PM

 To: rotaxengines-list(at)matronics.com (rotaxengines-list(at)matronics.com)  

 Subject: Re: 912 rough running below 3000 rpm912  rough running below 3

 



 Flynn,

  I had that problem once and finally narrowed it down to the carb  operating cables. One would stick during throttle reduction causing an  imbalance. I replaced the cables and problem solved. I tried to lube them first  but that didn't work well.

 Just another idea.

                    Dick Maddux

                    912UL

[quote]



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flynn elliott

Joined: 23 Jun 2007
Posts: 20
Location: SOUTH AFRICA

Posted: Sun May 24, 2015 10:11 am Post subject: 912 rough running below 3000 rpm912 rough running below 3

Hi Roger, we think we have the cable's covered, but as Vernon said we will

for sure double check.



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