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Engines Plugs Mufflers Fuel > OS61sxh-wc question
 
 
helinutforever
Heliman
Location: Delaware, Ohio

Have the OS61sxh-wc with a one peace weston tuned pipe running Wildcat 15% in a Raptor 60. I purchased this raptor/motor used and has sat for about 6 monhts.

Since i never ran this motor before I set all needles to factory settings (hi 2turns out, low 2 turns out, mid 1 turn out). It would not run with the hi turned out 2 turns, Turning in the hi needle to about 1 1/4 - 1 1/2 turn it would run, but very very poorly. Adjusted the low to get good idle and transion, and adjusted the high end to get good climbout.

My final needle settings were almost 1 turn out on hi end, low end is about 1 1/4 turn out. Am i to lean on high end, it dont seem to be overheating..

And also, during hover i get alot of tail twitching (motor cutting in/out about 1/2 cycles every 1-2 seconds. Im assuming the low end needs to be richened out to get rid of this, or should I be richening the middle needle to richen it out during hover and kill this tail twitching.

Thanks

I can fly em.. but can not tune for squat!
05-17-2002 Over year old.
HOMEPAGE  
 
 
Phil Cole
Veteran
Location: Redwood City CA

The engine cutting in and out could mean it's breaking into the occasional four-cycle. Four-cycling happens when you are too rich, and can easily upset gyros. Hover for a while then feel the head, or drop a blob of spit on it. If you get a blister or it sizzles then richness is not your problem, but I'm guessing it is, and your engine will be warm, rather than hot.

Some people start with the middle closed, and open it only if the mid-range hovering need to be richened up a bit after setting the high and low ends.
05-17-2002 Over year old.
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

I had an OS61SX like that. @ 2 turns out,
it wouldn't start or wouldn't stay lit.

It ended up < 1 turn out on the high.

Do yourself a favor and close the middle
needle until you get the low and high right.

Sounds like the low needs some adjustment.
Check via the pinch test or the throttle hold test
05-17-2002 Over year old.
HOMEPAGE  
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

WRONG.

Idle-two turns in from fully open!High-two turns out from fully closed .Mid-closed fully.
05-17-2002 Over year old.
 
 
scott3
Senior Heliman
Location: Pensacola Florida

My manual states : Idle mixture control screw, exactly two turns open from the fully closed position.
05-17-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Me2.

So did mine when i first got it and had a hell of a time then i saw a up graded version.Trust me on the settings.Idle-two turns in from fully open.High-two turns open from fully in.Mid closed until high and low fully set only if a lean condition exists in a hover.http://www.osengines.com/manuals/index.html
Look under carbs, it's the 60b.You will need adobe to read the .pdf file.
05-17-2002 Over year old.
 
 
helinutforever
Heliman
Location: Delaware, Ohio

Wow....

Wow.. two different manuals, tow different low end needle settings.. Geez... Yes, I see it now..

Imagine that...

Idling the thing in the garage tonight I do believe I got the low end close enough per the pinch test. It was way to lean.. We'll see tomorrow..

Thanks for all the info, and for pointing out the seperate info on the carb.

Take care
05-17-2002 Over year old.
HOMEPAGE  
 
 
scott3
Senior Heliman
Location: Pensacola Florida

I checked it out and it does say that. Not sure if that is actually a revision though. The date at the bottom said 1992 where the date on my manual says 2001.
05-17-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

You are welcome dudes :O)~

NO prob...Pass on the truth to all who want to learn .
05-17-2002 Over year old.
 
 
JeepsRcool
Senior Heliman
Location: Bismarck ND

I removed my Weston one peice pipe cause I could not get good response from it . My hIgh end needle was only open 1/2 turn . Good side was runtimes . I think there is way to much back pressure. It did run ok but not good. I put a JR muffler on and it runs way better and needle is open 1.5 turns.
05-17-2002 Over year old.
 
 
ErgoNut
Senior Heliman
Location: Auburn, NY (Syracuse Heli Group)

eureka!

I think I now know why I can't get my OS61sx-h to start. Had the needle settings all screwed up.
if you don't read very closely it's easy to miss the difference between the high and low settings. Thanks for pointing that out Safe_Cracker!
05-17-2002 Over year old.
HOMEPAGE  
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Ur Welcome guys.

I went throught the same situation and happened to lose my manual so I downloaded a copy.I went throught the provisional settings from the downloaded copy and everything was peachie.Later on I found my manual(paper copy) and noticed a discrepency in the print,BINGO they screwed up!So I shared my findings with you!ENJOY.
05-18-2002 Over year old.
 
 
Safe_Cracker
Key Veteran
Location: Chicago, IL

Work ok??

Work out for everyone??
05-18-2002 Over year old.
 
 
raptor30
Key Veteran
Location: Tilburg,The Netherlands

OS61sxh-wc question

Hi z11355,

In the reply above you were talking about the pinch test and the throttle hold test.

I know the pinchtest,but what is the throttlehold test???

Thanks,
Raptor30
05-19-2002 Over year old.
HOMEPAGE  
 
 
kovar
Senior Heliman
Location: West Chester, Ohio

OS Website

Why does the manual on the website state that idle should be 2 open from closed.

http://www.osengines.com/manuals/61...h-wc-manual.pdf

And then on the same page or 60B, it states the opposite for idle??
07-11-2002 Over year old.
 
 
kovar
Senior Heliman
Location: West Chester, Ohio

OS Tech Support

I called Technical support on this issue. According to OS Technical Support, the manual that ships with the engine is correct. Idle is two open from fully closed. Here is the doc.

http://www.osengines.com/manuals/61...h-wc-manual.pdf

This document on the 60B carb

http://www.osengines.com/manuals/27981010-manual.pdf

Is stated by technical support to be incorrect. The date on the 60B carb document is actually older according to technical support. They told me that this has been a problem before and that the document needs to be fixed.

I'm confused as all hell. I'm a newbie and actually am in the tuning process. I think I'm going to try it both ways and see which one gives me the better results.

I'm also going to send an e-mail to thier technical support just to see if I get the same answer. I'll let you guys know the answer I get in the e-mail.
07-11-2002 Over year old.
 
 
kovar
Senior Heliman
Location: West Chester, Ohio

Here is the e-mail response

Hello,

Thanks for your E-mail!

The instructions that state to adjust to two turns from fully closed is correct.

I hope you find this information helpful. Should you have any further questions or concerns, please do not hesitate to contact us at this email address. (Please be sure to copy all previous emails into any future questions.) You can also reach our product support technical team at 217-398-8970, or via fax at 217-398-7721.

DID YOU KNOW that our web pages now all contain FAQs? (Frequently asked questions) Please drop by and take a look! We hope you'll find the information helpful and valuable to you.

Thanks Again,

Nick Anderson
Product Support



>>> "apate@cesales.com" 07/11/02 12:52 >>>

On OS's website is the following manual

http://www.osengines.com/manuals/61...h-wc-manual.pdf

It states that the idle screw should be set to 2 full turns out from fully
closed.

However there is another document on the same page that talks about the carb
(60B).

http://www.osengines.com/manuals/27981010-manual.pdf

This document states that the idle screw should be set 2 full turns in from
fully open.


This is very confusing. Which one is correct? Thank you for the prompt
reply.

Best regards,

Adam
07-12-2002 Over year old.
 
 
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