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912UL on a Skyranger.

The end of the throttle cable in the cockpit where it attaches to the throttle lever on pilot`s side is a bit worn.
Enough where we need to change it out.

It is easy enough to find replacement cable that we could string through the sheath through firewall into cowling.

As most of you know once under the cowl it splits into two as it operated two carbs.

The device that allows the one cable to operate the two carb cables is a bit of a mystery to us.
See photos attached.


Where the single throttle cable meets the two carb cable (as in those photos) there is a red aluminum cylinder which has one cable coming in and two going out.

I am not sure if that is standard Rotax 912 configuration or unique to the Skyranger`s way of running the cable controls between the cockpit and the carbs.



I would like to replace the single cable into that cylinder. But I`m hesitant to open it up without knowing if that is a viable strategy.
Anyone know what is in that cylinder.
Is it possible to open it up do that? If so how?

Another option we are considering:
There is about 2 inches of of extra slack of cables at the carbs ends.
Wonder if we released it up there could it create slack on the cockpit end of the single cable near the throttle lever?


If neither of those are options, is there a source (hopefully USA?) for the whole assembly (incoming cable, cylinder it goes into under the cowl, two carb cables coming out)?

Al
IMG_0341.JPG (You do not have access to download this file.)
IMG_0343.JPG (You do not have access to download this file.)
  • Re: Replacing throttle cable 2 dual carbs?

    by » 13 years ago


    You have the STD splitter we use on most of the SkyRangers. It is a factory built unit, and used on other experimentals like the Titan Tornado. The mfg has built these as a sealed unit for a reason. I would purchase a new unit and be confident your complete assembly is in a safe condition for flight. The two cables that exit the tube are independent of the single one, so the extra length will only allow you to move the whole assembly. You could easily introduce excessive angles if you move the red splitter tube off it's central position. I can get you a new assembly if needed.

    Thank you said by: Al C

  • Re: Replacing throttle cable 2 dual carbs?

    by » 13 years ago


    Thanks much Bob,

    What you say makes sense.

    Can you email me direct (to temp3@fastmail.fm) with your contact info(as I'm having a little trouble acessing this formum) and/or price and availability of the part?

    Replacing the whole assembly raises at least two questions:
    1) Will we have to resynce the carbs?
    (Looks to me like not... As the upper limits and lower limits of the throttle cable movement on the carb end are fixed with set-screws and won't change.......)
    2) As I think you can see in the photos I attached, the cables and in PARTICULAR the splitter itself seems to be held in place with a propriotary/unique holder. Is that holder part of the assembly?
    3) Is the choke splitter assembly and cables part of the whole kit?
    We don't really NEED to replace the choke cables. Will we have to?

    Al

  • Re: Replacing throttle cable 2 dual carbs?

    by » 13 years ago


    Bob - can you point me towards a source for the STD splitter? I was unable to find them doing a Google search.
    thanks - Mike

  • Re: Replacing throttle cable 2 dual carbs?

    by » 13 years ago


    Call Ryan at Greenlandins he has one in stock, tell him Schutte sent you
    301-991-3807

    Thank you said by: Michael Nault

  • Re: Replacing throttle cable 2 dual carbs?

    by » 13 years ago


    :) thanks Bob,

    believe it or not, I managed to carefully trim off about 2 inches of excess outter sheath (very carefully use of Dremel with diamond cutting wheel) exposing unfrayed cable. also remedied the slight offset angle that was the cause of the frarying where cable had emerged from end of sheath. All cable now fully perfect. Only difference is one segment, which was longer than really needed for its run, is 2 inches shorter.

    So unlikely to need new cable assembly for very long time.

    (If anyone has similar situation they can contact me for exact details of this repair and techniqe tips.)

    By the way: Although this cause of fraying was probably due to a slight uniqe misalignment on how our Skyrangerr's throttle was installed, it does suggest inspecting all throttle, choke, and similar cables carfully especially where they emerge and touch.

    on our setup if the cable broke while engine was running it would go to full power totally unexpectedly. depending on where and when that happened results would range from very disconcerting and challenging to extremelly dangerous.

    Al

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