NEW YS 140 SPORT RUNS TERRIBLE  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


90 Degree Muffler Adapter
Seller:  RC Specialties
Details:   $17.95   |  7/13/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> NEW YS 140 SPORT RUNS TERRIBLE
Page: [1]

Login
Message << Older Topic   Newer Topic >>
NEW YS 140 SPORT RUNS TERRIBLE - 5/6/2008 5:01:52 AM   
cpe190


 

Posts: 19
Joined: 6/19/2007
From: WOODS CROSS , UT, USA
Status: offline 		Hi, I have a new ys 140 sport that will idle ok but runs very unstable at mid and especially high speed. Almost seems lean but when i try to richen it up nothing really happens just runs worse. I have the regulator set flush and have tried adjusting it but just seems to make the problem worse. I have the check valve installed and am getting pressure when remove the line from the check valve. Also i am running an APC 16 x 10 prop? Please help
       Post #: 1

RE: NEW YS 140 SPORT RUNS TERRIBLE - 5/6/2008 10:01:20 AM   
David Bathe



Posts: 45
Joined: 3/18/2008
From: Oslo, NORWAY
Status: offline 		What fuel are you using as this seems to be typical fuel type related problems.
Don't bother touching the reg'. leave it factory set, flush with the housing.
YS's tend to run only in two modes: VERY-VERY- BAD or, VERY GOOD. I've never experienced anything inbetween.
There are a couple of things that I've discovered are required to get the best from a YS.
Cool Power 30% heli. (I'm sure other fuels work, I've just NEVER had ANY success with them!)
and an OS F Plug.
From my experience with that engine you are spot on with the prop choice.


_____________________________

Best Regards: david bathe com
Aircraft and Instrument Panel Illustrations.

(in reply to cpe190)
       Post #: 2

RE: NEW YS 140 SPORT RUNS TERRIBLE - 5/6/2008 6:14:17 PM   
Hughes500E



Posts: 1022
Joined: 11/23/2002
From: Armstrong, BC, CANADA
Status: offline 		16-10 seems a little strong to me for a 140-sport

Run the engine up full speed with a tach, drop it back 300 rpm from peak. Pull the stick down quick and stop at 4000 RPM 1/4 throttle.
If the engine surges up and down you're lean, if it starts to load up and drop RPM you're rich adjust your regulator. Run it back up full etc repeat, after the regulator and high speed needle are set, adjust the low end and do it all again. It took me 3 attempts to set the reg on a 140. We're talking 1/8th turns on the reg max, when all was set, 1.5 turns out on the low speed was magic!

PS
I have yet to see a regulator on YS flush to the case but, I'm no expert !

(in reply to David Bathe)
       Post #: 3

RE: NEW YS 140 SPORT RUNS TERRIBLE - 5/7/2008 2:14:27 AM   
F.Imbriaco


 

Posts: 192
Joined: 7/27/2003
From: lebanon, NJ, USA
Status: offline 		Run a top shelf fuel like Powermaster 20/20 , a 15x12 prop , an air tight tank and lines with fuel dots , (not fueling valves) and don't mess too much with the regulator. Set it flush , then out an additional quarter turn . An OS F plug is recommended. Be certain that your check valve is properly oriented. This is a fabulous engine which satisfies the demands of pattern flyers , so you know you made a good choice.

(in reply to Hughes500E)
       Post #: 4

RE: NEW YS 140 SPORT RUNS TERRIBLE - 5/8/2008 5:32:37 AM   
Kweasel


 

Posts: 1070
Joined: 1/7/2004
From: fort worth, TX, USA
Status: online 		Get some fresh fuel and a new glowplug, this will elliminate two possible causes of your problem. Take care of your fuel because fourstrokes are much more sensitive to fuel contamination than twostrokes.

(in reply to F.Imbriaco)
       Post #: 5

Page:   [1]
All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> NEW YS 140 SPORT RUNS TERRIBLE
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.438RCU1