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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

PostPosted: Sun May 24, 2015 4:01 am    Post subject: 912 rough running below 3000 rpm912 rough running below 3 Reply with quote

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.

PostPosted: Sun May 24, 2015 5:32 am    Post subject: Re: 912 rough running below 3000 rpm912 rough running below Reply with quote

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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Roger Lee
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vernon11



Joined: 03 Aug 2010
Posts: 14

PostPosted: Sun May 24, 2015 7:13 am    Post subject: 912 rough running below 3000 rpm912 rough running below 3 Reply with quote

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]

href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.matronics.com/Navigator?RotaxEngines-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
[b]


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flynn elliott



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

PostPosted: Sun May 24, 2015 10:11 am    Post subject: 912 rough running below 3000 rpm912 rough running below 3 Reply with quote

Hi Roger, we think we have the cable's covered, but as Vernon said we will
for sure double check.

--


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