Today's Message Index:
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1. 04:47 AM - Re: Throttle springs (Thom Riddle)
2. 05:31 AM - Re: 91 Octane Mogas (Jeffrey A Beachy)
3. 08:29 AM - Re: Throttle springs (Jim Feldmann)
4. 02:49 PM - Re: Another throttle spring problem. (jetboy)
Message 1
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| Subject: | Re: Throttle springs |
That picture says it all. That throttle return spring looks a lot like the carb
support spring just above it, and as Roger said, that is definitely the wrong
spring.
Our RANS S6 has a Vernier throttle with correct Bing throttle return springs and
that combination works as designed.
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Thom Riddle
CFI-SP
Power Plant Mechanic
N1208P RANS S6S, Tailwheel, 912UL
N197BG FS1/447
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Scratch any cynic, he said, and youll find a disappointed idealist.
George Carlin
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Message 2
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| Subject: | Re: 91 Octane Mogas |
Thanks to all for your helpful replies. I have ordered some Decalin to
use with 100LL on my cross country.
Jeff Beachy
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| Subject: | Re: Throttle springs |
Thank you all for your help. I will order the correct throttle and chock springs
from Rotax.
Jim
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Message 4
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| Subject: | Re: Another throttle spring problem. |
The carbs on the Rotax 2 strokes are quite different to the 912, being slide carbs
they do have a spring that forces the slide shut and takes out the play
in the cable control. The cables are braided pull cables, so they need to be operated
this way.
So yes, in the normal use of these carbs a cable or linkage failure to any carb
will shut the engine down. We had a Pelican 618 with this setup and added a WOT
spring to the throttle system to give full power in the event of loss of linkage
in the cabin. There is not much that can be done for the individual flexible
pull cables, other than ensuring the linkage joints are secure and not prone
to any twisting movement to the cables. The usual method of passing the cable
end through a drilled bolt shaft between some jam nuts is marginal at best.
My preferred way is to join the 2 carb cables with a motorcycle 2 into 1 junction,
made of metal joiner, and run a single cable to the cabin. These joiners
use regular cable ends and put no shear or twisting onto the cables.
Ralph
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Ralph - CH701 / 2200a
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