R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 06-05-2007, 12:03 PM   #1
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Exclamation Carburetor Help

I have been trying to start my engine for some time now and now that I think I'm pretty close, I cannot operate my carburetor by ways of the throttle servo/bell. The bell moves, but it does not open or close the carb a lot, and it seems as if my low speed needle is sinking back into the carb??? please any help would be very much appreciated
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 12:37 PM   #2
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

bump, come on guys please!
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 01:37 PM   #3
Tech Elite
 
rmdhawaii's Avatar
 
Join Date: Feb 2006
Posts: 3,804
Trader Rating: 4 (100%+)
Default

Have you already tried adjusting the throttle end points on your transmitter?

What car, radio and engine are you using???
__________________
Nitro Knowledge Base: http://nitrokb.netne.net
My YouTube Channel: http://www.youtube.com/nitrokb -> Lots of on-road nitro & eletric action + some off-road as well
My Flickr Photostream: http://www.flickr.com/photos/nitrokb/
Kyosho V-ONE RRR WC (x2) \ XRAY T2'007 \ Also owned: XRAY NT1 & Mugen MTX-4
rmdhawaii is offline   Reply With Quote
Old 06-05-2007, 04:19 PM   #4
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

Well, elec. isn't an issue right now, all I'm doing is playing with the bell on the end of the carb and the slide isn't opening correctly...Hpi Nitro Rs4 3 18ss, Nitro Star 18ss small block, futaba radio and elec.
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 04:47 PM   #5
Tech Master
 
Rapid Roy's Avatar
 
Join Date: Oct 2002
Location: L.A. (Rowland Hts)
Posts: 1,531
Default

I beleive that you have a rotary carb not a slide carb. It this is true, then try tightening the screw that attaches the arm to the carb.
Rapid Roy is offline   Reply With Quote
Old 06-05-2007, 04:48 PM   #6
Tech Adept
 
matts6887's Avatar
 
Join Date: Jan 2007
Location: Scottsdale, AZ
Posts: 102
Send a message via AIM to matts6887 Send a message via MSN to matts6887
Default

Quote:
Originally Posted by RaceANissan616 View Post
I have been trying to start my engine for some time now and now that I think I'm pretty close, I cannot operate my carburetor by ways of the throttle servo/bell. The bell moves, but it does not open or close the carb a lot, and it seems as if my low speed needle is sinking back into the carb??? please any help would be very much appreciated
Well some more info is definately needed here it seems. As someone else already pointed out, we need to know the engine and type of vehicle at least in order to help out. Also, by "bell" are u referring to the slide part of the carb itself, or something else?
matts6887 is offline   Reply With Quote
Old 06-05-2007, 04:51 PM   #7
Tech Adept
 
matts6887's Avatar
 
Join Date: Jan 2007
Location: Scottsdale, AZ
Posts: 102
Send a message via AIM to matts6887 Send a message via MSN to matts6887
Default

Also, if u have a computer radio as it seems quite a few peep these days so, try re-adjusting the endpoints for the throttle/brake servo using the radio's instructions.
matts6887 is offline   Reply With Quote
Old 06-05-2007, 05:12 PM   #8
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

sorry I probably didn't provide enough details, it is a rotary carb, I used the wrong word, not the slide, the opening where the air goes into the carb...I have an analog futaba radio and I do NOT have an issue with electronics, and what exactly do I tighten, and if it's by the LSN I have tried to tighten it but it either makes the carb impossible to open or it doesn't move...The bell I am referring to is the one that is at the end of the carb by the LSN which has the ball cup that connects to the throttle servo and such. thanks
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 05:57 PM   #9
Tech Master
 
Rapid Roy's Avatar
 
Join Date: Oct 2002
Location: L.A. (Rowland Hts)
Posts: 1,531
Default

From what you are describing, you pull the arm on the carb while looking down into the carb neck and you don't see the carb opening up. If this is what is happening, the arm thats connected to your carb needs to be tightened. This is NOT the idle adjust screw or either of the screws to adjust the fuel mixture.
Rapid Roy is offline   Reply With Quote
Old 06-05-2007, 06:05 PM   #10
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

Yes, but the only way to tighten the "bell" to move the carb opening is to tighten the nut around the LSN, not the LSN, but there is a nut around it that tightens this bell towards the carb...if this is tightened however, the carb becomes immobile, I can't find a happy medium :sad:...And the carb kinda moves a little bit but then it stops, I don't really know how to explain it better than that...sorry, help would be appreciated
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 06:34 PM   #11
Tech Master
 
Rapid Roy's Avatar
 
Join Date: Oct 2002
Location: L.A. (Rowland Hts)
Posts: 1,531
Default

Did you take apart the carb? Either the "arm" (not bell) is getting pinched against the carb body or the "rotor" assembly that is supposed to turn inside of the carb is stuck or jambed.
Rapid Roy is offline   Reply With Quote
Old 06-05-2007, 07:28 PM   #12
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

No i didn't really touch it, apart from taking the nut off from the 'arm' haha...i don't know what all those parts are inside, and there is a nut at the other end of the carb, I didn't know what it was at the time but I'm getting worried taht it was the middle speed needle??

And there's my carb...i don't know if you can tell what I'm talking about or not, but I hope that helps... thanks
RaceANissan616 is offline   Reply With Quote
Old 06-05-2007, 09:22 PM   #13
Tech Master
 
Taylorm's Avatar
 
Join Date: Nov 2006
Location: Monclova, Ohio
Posts: 1,647
Default

Quote:
Originally Posted by RaceANissan616 View Post
No i didn't really touch it, apart from taking the nut off from the 'arm' haha...i don't know what all those parts are inside, and there is a nut at the other end of the carb, I didn't know what it was at the time but I'm getting worried taht it was the middle speed needle??

And there's my carb...i don't know if you can tell what I'm talking about or not, but I hope that helps... thanks
-there shouldn't be a middle speed needle. there should be a nut that holds the carb. lever tight to the "barrel" that rotates inside the carb. body. if this nut is loose the servo will move the "lever" but not the barrel. tighten this nut and put a little loctite blue on it and you should be good. lookk at item 1 in this os exploded view..yours should be similar....... http://www.osengines.com/parts/ev11620aa.pdf
__________________
Current stable... Team Associated SC8, Team Associated RC250 X 3
Tamiya F104X1...Tamiya F104W GP Edition...BMT/RC300 Frankenstein.....Edam Razor2
Checkers or Wreckers......................................................................................
Taylorm is offline   Reply With Quote
Old 06-06-2007, 05:20 AM   #14
Tech Apprentice
 
RaceANissan616's Avatar
 
Join Date: Oct 2005
Location: Massachusetts, USA
Posts: 97
Send a message via AIM to RaceANissan616
Default

haha I think I have all the terms down now, I tightened the nut yesterday, but when I did that I couldn't move the arm at all, in effect not moving the barrel of the carb...Also I had noticed that my LSN has moved further into the carb when I was messing around with that nut, does this have anything to do with the odd barrel movements? (sticking, clicking, not moving at all)
RaceANissan616 is offline   Reply With Quote
Old 06-06-2007, 05:52 AM   #15
Tech Master
 
Taylorm's Avatar
 
Join Date: Nov 2006
Location: Monclova, Ohio
Posts: 1,647
Default

Quote:
Originally Posted by RaceANissan616 View Post
haha I think I have all the terms down now, I tightened the nut yesterday, but when I did that I couldn't move the arm at all, in effect not moving the barrel of the carb...Also I had noticed that my LSN has moved further into the carb when I was messing around with that nut, does this have anything to do with the odd barrel movements? (sticking, clicking, not moving at all)
-maybe the barrel is sticking in the carb body. i have an old os that i dug out and the barrel was sticking in the body. gummed up with fuel/oil. you may want to take the carb completely apart, clean thoroughly and start over.
__________________
Current stable... Team Associated SC8, Team Associated RC250 X 3
Tamiya F104X1...Tamiya F104W GP Edition...BMT/RC300 Frankenstein.....Edam Razor2
Checkers or Wreckers......................................................................................
Taylorm is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
O.S. .12 TG-x with 12 E rotary carburetor playboy Nitro Off-Road 2 12-18-2007 12:16 AM
Carburetor issue catkchun Malaysian R/C Racers 17 12-05-2007 06:30 AM
NIB O.S. .12 TG (P) with 12D Slide Carburetor Budz R/C Items: For Sale/Trade 0 10-29-2007 01:46 PM
Looking for P5 carburetor ManicRC R/C Items: Wanted to Buy 0 04-08-2007 07:35 AM
O.S. RG-X Carburetor skengines R/C Items: For Sale/Trade 0 08-04-2006 11:47 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:44 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net