RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 1077 views
HelicopterMain Discussion › 60b carb issue.
09-07-2003 01:30 PM  14 years agoPost 1
akpatterson2000

rrNovice

Limerock, CT

My Posts: All  Forum  Topic

For days I've been trying to sort out my engine troubles in my 0S 50 with 60b. This set up is in an ergo 46 with 550 NHP. The engine idles great and pulls out at fuel throttle like a 60. However, the middle breaks-up! In addition, this stubble begins and ends at a very precise spot in the throttle position everytime. So needless to say I've tried EVERY possible needle combination. I've tried fuels, plugs, perry pump, and uniflow with no results. I tore the carb down and found no junk. However I did find something.
Upon inspection of the, throttle barrel, I think that what it's called. Its the part that rotates inside the carb throat when the throttle arm is moved. This piece had a HAND machined, "HACK SAW" slot with a hole drilled in the middle of it, and postion so fuel from the midrange needle port would flow to the slot/hole then out to the barrel. The positioning of the slot /hole seems to be correct so that it is effective in the midrange. Also, there looks like a previous hole was welded over and the sanded BY HAND. Another sign of fine craftmanship is that the factory anodizing was effected by this work and not replated. So my question is, If anyone with a 60b remembers what their's looks like when it was apart, or is someone has thier's currently out, could you check it for me? Finally, I realize my situation is posibly a case of operator tampering but I don't put ANYTHING past O.S. OH, did I say that?

PM  EMAIL  GALLERY  Attn:RR  Quote
09-07-2003 03:39 PM  14 years agoPost 2
heliguy

rrVeteran

Boulder, CO

My Posts: All  Forum  Topic

...

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-07-2003 04:24 PM  14 years agoPost 3
heliguy

rrVeteran

Boulder, CO

My Posts: All  Forum  Topic

...

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-07-2003 05:36 PM  14 years agoPost 4
akpatterson2000

rrNovice

Limerock, CT

My Posts: All  Forum  Topic

heliguy,
Thanks for the pic and descriptive post. My barrel looks like that but with sanding marks. I have tried your procedure but with no change. I can get the high end running great but then when I adjust the midrange needle, from fully closed, out one click at a time and test there is no change for the better. I've even tried it all the way the out, maybe four turns or so. I also tried to make it slobbering rich so that it won't transition to high speed but it won't do it. The high needle does work very well. The engine will go lean or rich if I choose to make it so.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-07-2003 10:13 PM  14 years agoPost 5
Norseman

rrApprentice

Bodø Norway

My Posts: All  Forum  Topic

You might have a muffler problem.
The OS .61 SXWC in my Futura SE was just like that in the beginning when I ran it on a tuned pipe. Once I changed to a muffler it was running smooth as silk.
The after a while I put the pipe back on, and the problems reappeared. This time I tried several needlesettings, and found that if I ran it really lean on idle and closed the midrange needle fully, it would run sort of ok.
Then I changed fuel to a brand that contains a oil called "super synth oil", and I had to richen the low end about one turn. I could open the midrange needle 1/4 turn and richen the high end by 1/4 turn. The engine have run flawlessly ever since, so you might want to try a few other brands of fuel before you give up.

Happy Flying
Steinar

PM  EMAIL  GALLERY  Attn:RR  Quote
09-07-2003 11:26 PM  14 years agoPost 6
reefguy

rrApprentice

palmdale california

My Posts: All  Forum  Topic

os61wc

heliguy,

very good informative info. on the 60b carb, i have a question, my wc on my freya, with a hatori pipe runs great, but very little smoke, engine is very warm/hot , but not excessively hot, when flying almost 3/4 stick to full at times, the smoke trail at times is almost gone, until when i bring it to hover then the smoke trail is back, i am pretty sure that my idle/mix, could be out of settings, but was wondering if i have a problems or not. thanks,..

PM  EMAIL  GALLERY  Attn:RR  Quote
09-07-2003 11:29 PM  14 years agoPost 7
G.Man

rrProfessor

Bristol

My Posts: All  Forum  Topic

i like to think of the mid range needle as a compensation needle for the main needle...

that way you set the main and idle and then adjust the mid range so it doesnt lean out during a hover...

Don't Email me as I wont reply - PM Only (spam countermeasures)

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2003 01:40 AM  14 years agoPost 8
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

akpatterson2000,,, go ahead and get a new barrel if you want, they can't cost to much, it may help,,, but, I got to tell you, 550s on an OS 50 with a 60B carb is wrong, you need 600s, I have a 60B and a t-pipe on my Falcon and I wish I had some 620s (t-pipe or not),,, 550s are not loading your motor the way it should be, I find my OS 50 likes some what of a load, I get no bogging and she is real powerful and fast ...

tuning,,,
1/2 a gallon ago I switched fuels, I got a lot more smoke because this fuel has more oil, but I was having a problem getting the mid needle right, guys that have been flying for 9 years said my idle screw was OK, but I kept thinking that it was to lean because my idle was not smooth as I thought it should be, so today I richend up my idle screw and WOW, I have now finely got my mid right, and I got a very nice smooth idle...


Jim

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2003 01:58 AM  14 years agoPost 9
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

now I feel Galifrey is right,,, see every time I went to an idle my idle was never the same, sometime it would rev a little high and some times it would make the "na na na na na" sound so I knew my idle screw was to lean, plus my mid needle was very sensitive, so I could not get the mid right, but because I was told to leave it alone I started compensated my mid with my curve so I had to lower my curve a lot, now I have it right, I have a fat idle, a fat mid and my high needle is 2 clicks from being right on the edge, and I have a lot of pitch at 1/2 and 3/4 point for a load on my motor,,,

I think this is the trick for the 60B carb on the OS 50, the low and mid need to be fat and you need more pitch for a load on the motor, so it will not run erratic...


Jim

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2003 03:51 AM  14 years agoPost 10
vetrider

rrElite Veteran

Daleville, AL (Ft.Rucker)

My Posts: All  Forum  Topic

Check it out

Check out the NEW OS50 solution.

I'll be doing this mod tomorrow.

OS 50 Carb Mod

Nolan

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2003 07:25 AM  14 years agoPost 11
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

I wonder if this mod will work on the 60B ,,,

as for the 60B I have had great success, when using it with a muffler it was very easy to tun, but with the tuned pipe I did have to work a little more to get it right, then I changed fuels so then I had to do it all over again, but I have it right now and it works wonders,,, the thing about the bigger carb on the 50 is not-only does it fix the lean spot and give more power, but it really smoothes-out the 50,,,

buy all means I do suggest that people do this modification to their stock carb, more power and no lean spot, all for free, what could be better,,, it's going to be interesting to see the results,,, maybe I will put my stock carb back on ??


Jim

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2003 03:11 PM  14 years agoPost 12
vetrider

rrElite Veteran

Daleville, AL (Ft.Rucker)

My Posts: All  Forum  Topic

I've got a perfictly good OS61SX-H that I was hoping to not steal the carb from.
Now that Augusto and Richard have gotten this out and knowing that these two guys are not BS'ers (most of the time anyway ), It would be stupid to not try this first.

I would think that with the 60 B carb the mod would change the needle settings more than solving any problem. I say this because the adjustment range is already more by the 3rd needle valve. But, I'm not an experianced RC carb guy by any means. I can do motorcycles though so not all is lost.

Crap!!!..... I have to get to the shop and DO IT!

Later guys

Nolan

PM  EMAIL  GALLERY  Attn:RR  Quote
09-09-2003 12:58 AM  14 years agoPost 13
akpatterson2000

rrNovice

Limerock, CT

My Posts: All  Forum  Topic

Thanks to everyone for their help

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1077 views
HelicopterMain Discussion › 60b carb issue.
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Tuesday, December 12 - 11:51 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online