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Old 07-09-2013 | 08:30 PM
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Default Help with carb idle screw

Brand new OS .18 crv on a rc10gt.

My idle set screw doesn't open the idle gap far enough. Its screwed all the way down and there's just barely enough gap to get close to idle. Unscrewing it take the gap away so there's no gap at all. There does seem to be a spring around the base of the screw. Should I unscrew it and take this spring off in order to get more idle gap? GRRR This is frustrating.



EDIT: GRRRRRR I cannot post the image to get help with my problem because I dont have enough posts. I cant acquire posts because I cant post pictures to help with my questions. All these rules.

PM me for a pic of the issue.
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Old 07-09-2013 | 08:35 PM
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See sig.
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Old 07-09-2013 | 09:31 PM
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That idle gap looks reasonably big, most of the time the idle gap should be under 1mm.
How rich is the bottom end or the LSN setting, if the bottom end is very rich then that will cause the idle to be very low. Leaning out the LSN a little will raise the idle, once you have the idle higher, you might have to close that idle gap up a little more.
I know its a different carb set up to the slide carbs but it should still work the same with the idle gap as far as I know. I use a thin paper clip to set the idle gap in my engine, its .8mm, then lean the LSN to raise idle & tune bottom end.
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Old 07-09-2013 | 10:00 PM
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Originally Posted by ozziii
That idle gap looks reasonably big, most of the time the idle gap should be under 1mm.
How rich is the bottom end or the LSN setting, if the bottom end is very rich then that will cause the idle to be very low. Leaning out the LSN a little will raise the idle, once you have the idle higher, you might have to close that idle gap up a little more.
I know its a different carb set up to the slide carbs but it should still work the same with the idle gap as far as I know. I use a thin paper clip to set the idle gap in my engine, its .8mm, then lean the LSN to raise idle & tune bottom end.
I have not touched the LSN. Any idea how many turns out it should be on a gt after break in?
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Old 07-10-2013 | 07:21 PM
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that idle gap is huge!... that's almost 1/4 throttle, not idle

don't worry about counting "turns". Close the idle gap with the engine off until it's open just barely more than visible. Start the engine and lean it down until the idle is stable.
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Old 07-10-2013 | 09:07 PM
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Originally Posted by R/C Lidz
that idle gap is huge!... that's almost 1/4 throttle, not idle

don't worry about counting "turns". Close the idle gap with the engine off until it's open just barely more than visible. Start the engine and lean it down until the idle is stable.
Somehow I think the pic makes it appear slightly more open than it is but I'll try what your saying when I get the car back together. Think I'm doing too many things at once and its a mess. Wheels and tires all over the place, new clutch bell going in, and messing with the carb.
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Old 07-10-2013 | 09:25 PM
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Try closing the gap down to about the widths of a credit card then lean the low end a little at a time until you get a stable idle.

Also try heating the engine with a heat gun before ou start it. I you don't have heat gun a hair dryer can work. This will get thigs warm and allow the engine to run easier when it starts.
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Old 07-10-2013 | 09:27 PM
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Originally Posted by ATXPro4
Try closing the gap down to about the widths of a credit card then lean the low end a little at a time until you get a stable idle.
Ok. Tightening the lsn is leaner, right?

edit: I live in humidity hell (KY) so I wonder how close that will be.
edit2: How many posts do I need before I can post links? Just curious.
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Old 07-10-2013 | 10:42 PM
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Originally Posted by Justin428
Ok. Tightening the lsn is leaner, right?

edit: I live in humidity hell (KY) so I wonder how close that will be.
edit2: How many posts do I need before I can post links? Just curious.
Yes. Try about a quarter turn to start, smaller adjustments after that.

I think you need 10 posts, almost there.

Edit: Been to Louisville, nice town but that is NOT humidity hell. Come join me in the everglades
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Old 07-10-2013 | 10:44 PM
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Originally Posted by wingracer
Yes. Try about a quarter turn to start, smaller adjustments after that.

I think you need 10 posts, almost there.
Thanks. I look to be more involved with this forum as I think I'm annoying my LHS car guy with 63,435 questions everyday.
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Old 07-10-2013 | 11:08 PM
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I was not aware that you had to have a minimum number of post to put up a picture, but it may be so. Nonetheless it is confusing to do. So... here's how you do it if it can be done with a low post count- Near the bottom after all the posts click "Post Reply". Not quick reply, quote, or anything else. Once in "Post Reply" a message window will open. A thick thin blue line with the wording "Additional Options" below the message box that you are going to type in will appear. Under that, you can click "Manage Attachments". Then click "Choose File". It should be obvious from there.

Yes, screwing the LSN (low speed needle) in will lean out your bottom end which consequently also raises your idle speed and that is what the above posters are explaining. Imagine if your engine was tuned right and idling right and then you richen your LSN (unscrewing it). Your idle would get lower and lower. Too much nitro would be getting in, throwing off the air / fuel ratio, and thus bogging your engine down. Not realizing the LSN also affects idle speed, one might turn the idle screw in more and more in an attempt to raise the idle to no avail because it's beyond the adjustment capabilities. Therefore, turn your LSN in (which is leaning it) an 1/8 turn at a time until you get it running and idling ok. I have a feeling your idle is going to start going way up and you'll have to back out the idle screw some to bring it down. Youtube has some good videos on how to tune your nitro engine.

Good luck
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Old 07-10-2013 | 11:11 PM
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Reviewing this thread again, I see you were asking about posting a link. I gave you info for posting pictures.
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Old 07-11-2013 | 06:25 AM
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Use a thicker paperclip to get the proper idle gap. Stick the end in and close your idle until it just touches the clip. Then lean out the bottom until it runs. Be careful tho, the engine can load up on fuel and not want to rev. Youll have to start it with some added throttle to clear it out.
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Old 07-11-2013 | 12:58 PM
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Originally Posted by My ST-RR EVO
Reviewing this thread again, I see you were asking about posting a link. I gave you info for posting pictures.
lol I wasn't going to say anything!
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Old 07-11-2013 | 02:14 PM
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Originally Posted by Justin428
lol I wasn't going to say anything!
LoL! Did you get your r/c running? Keep us posted.
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