Enya 120 4c throttle/chock question - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-08-2021, 12:52 PM   #1
nitrojuice
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Enya 120 4c throttle/chock question


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I picked up an enya 120 4c newer version awhile back and getting ready to mount it in an airplane. It has the choke where you pull the throttle barrel sideways to choke it.

After looking at the manual online, it doesn't appear to be missing anything, but seems like it would easily pop into choke mode while running.

Anybody with experience, of know of a way to have it NOT pop sideways when it isn;t suppose to??
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Old 05-08-2021, 01:10 PM   #2
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Re: Enya 120 4c throttle/chock question

I've not seen one of them but wondered if a spring could be used to keep the barrel pushed over to its normal operating position.
(Saito FA-300 carb uses a spring to keep the barrel pushed against the fuel inlet.)
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Old 05-08-2021, 02:16 PM   #3
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Re: Enya 120 4c throttle/chock question

I had a enya 120 and a 120R both were air bleed carbs , don't remember ever having to pull the barrel but it was a long time ago , Are you sure you are not missing the barrel alignment screw , or maybe have the wrong one allowing to much side play .. if you can post a picture it would help . cheers ..
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Old 05-08-2021, 05:15 PM   #4
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Re: Enya 120 4c throttle/chock question

Okay.... found a review of this motor by Clarence Lee on Sceptre Flight at http://sceptreflight.com/Model%20Eng...20R120-4C.html

The later 120R apparently used the choking method you describe.
The "spring loaded ball" which engages a groove in the barrel just sounds like a part waiting to get lost when an unsuspecting modeler disassembles the carb.
Be careful when taking a look at this.....spare parts may be hard to get!
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Old 05-08-2021, 05:18 PM   #5
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Re: Enya 120 4c throttle/chock question

Hey! I just learned something from you!

Yup the barrel pops out just like you said on my Enya 120-4C. I had no idea! Sweet!

Any way on closer inspection, there is a grove in the barrel, you can clearly see it in the accompanying photo, in the popped out position. Right next to it on the top of the carb body is a recessed set screw. At 90* to it there is a threaded plug with flats on it so one could screw it out. I suspect there is a spring and ball or pin behind there to hold the carb barrel in the normal run position. That is what it feels like when I operate mine in and out. It has a definite snap in and out to it.

It takes a bit of effort to pop it in and out of position so I cannot see it happening in flight.

And yes it is an air bleed carb RAMJET.
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Old 05-08-2021, 05:30 PM   #6
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Re: Enya 120 4c throttle/chock question

I wonder if any other Enyas have that feature.
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Old 05-08-2021, 05:35 PM   #7
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Re: Enya 120 4c throttle/chock question

Well All be, never knew mine could do that either, or don't remember doing it , could be more the case LOL . I never would have used it anyway because I just put my finger over the exhaust on all my 4 cycles and flip them a few times . But live and learn eh? .. You should be able to come up with some sort of ball and spring to make it work if it's missing . May just be the ball is Gummed up and stuck in the hole . try to heat it up a bit with a heat gun and see if it will free up .. cheers
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Old 05-08-2021, 06:09 PM   #8
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Re: Enya 120 4c throttle/chock question

The end of that long nut that holds the throttle arm in place is actually threaded so you could run a threaded rod outside the cowl to operate the choke. Sweet!

My .53 4C has the same long threaded nut too. At the present the throttle barral is stuck but I will free it up and see...

Now I am wondering about my Enya 2.40 twin...
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Old 05-08-2021, 06:17 PM   #9
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Re: Enya 120 4c throttle/chock question

The saito uses a rod that you have to thread in every time you want to choke the engine , you cant leave it in because it will damage the carb and it's a real pain to do . What I do is thread a piece of steel pull pull cable through a open hole in the throttle arm and pull the wire through the side of the cowl . when you want to choke just pull the wire , the wire does not restrict throttle movement and does not weigh enough to cause any wear . don't know if the enya barrel will return on it own like the saito .
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Old 05-08-2021, 06:38 PM   #10
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Re: Enya 120 4c throttle/chock question

The answer on the .53 is yes. It even comes with a rod to screw in and extend out the cowl.

As for the 2.40, no. Same carb bodies but they are not machined for this feature and are mounted too close together anyway.

My Enya .60 4C does not either, it has a conventional choke.
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