YS 63FZ and UCANDO 46  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> YS Engines Support >> YS 63FZ and UCANDO 46
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YS 63FZ and UCANDO 46 - 5/9/2004 7:53:11 PM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		I am running a YS 63( probably less than 10 hrs flight time) in my UCANDO. The engine seems to run fine on the ground, bu I notice surging during the flight and the engine dies on approach. I suspect a heat-related problem. Previosuly, I have engine on a TopCap and zero problems with it.

I am running it with the cowl, but do have plenty of ventilation-in and out. The rest of the of the info is: I am using Willdcat YS 20/20 with a 13x6 APC prop. I tune it for around 10-10.5k on the ground. Any suggestions?
       Post #: 1

RE: YS 63FZ and UCANDO 46 - 5/9/2004 11:51:27 PM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Reduce the prop load until the engine is running between 11000 and 11500.

(in reply to rightflyer)
       Post #: 2

RE: YS 63FZ and UCANDO 46 - 5/10/2004 1:42:29 AM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		Thanks, I will give it a try next weekend. I have a 13x4Wide APC I will try as well as a 12x6.

(in reply to Dave Shadel)
       Post #: 3

RE: YS 63FZ and UCANDO 46 - 5/10/2004 2:16:09 PM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Let me know.

(in reply to rightflyer)
       Post #: 4

RE: YS 63FZ and UCANDO 46 - 5/14/2004 10:04:43 PM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		I am trying to verify the Tappet Clearance before taking her up tomorrow. The manual I donwloaded does not say where you measre the clearance? TDC?

(in reply to rightflyer)
       Post #: 5

RE: YS 63FZ and UCANDO 46 - 5/15/2004 12:05:49 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		PISTON at TDC. Set valves at .003"

(in reply to rightflyer)
       Post #: 6

RE: YS 63FZ and UCANDO 46 - 5/15/2004 1:31:56 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Up

(in reply to Dave Shadel)
       Post #: 7

RE: YS 63FZ and UCANDO 46 - 5/17/2004 12:49:29 AM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		Dave
I flew my YS 63 today with the APC 13x4W and it flew well. However, I was not able to get 11-11.5k you recommended. It would seem to run too lean so I backed it back to 10.5k. No sign of the surging or overheating. I did have a problem with the engine dying on approach or upon touchdown. I tried richening the low end needle for my final flight and it helped.

(in reply to Dave Shadel)
       Post #: 8

RE: YS 63FZ and UCANDO 46 - 5/17/2004 2:06:38 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Maybe you need to try a standard 13x4. 10500 isn't bad, I just like to run them faster. They run cooler and have better throttle response. Is the plug new, or close to it?
What is the idle speed?

(in reply to rightflyer)
       Post #: 9

RE: YS 63FZ and UCANDO 46 - 5/17/2004 11:48:45 PM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		I can do some shopping for a 13x4 regular. I have a 12x6 too I could try. the plug is new-a YS 4 stroke plug.

(in reply to Dave Shadel)
       Post #: 10

RE: YS 63FZ and UCANDO 46 - 5/18/2004 12:48:12 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		See what it will turn on the 12x6.

(in reply to rightflyer)
       Post #: 11

RE: YS 63FZ and UCANDO 46 - 5/23/2004 7:47:23 PM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		Well, my saga continues. I stayed with the 13x4W becuase I tached it at 13,950 so I thought that was pretty close to your target. The engine conties to idle well and run great until approach or landing when it generally dies. It do not typically here it sputter before it dies. Could my issue still be heat related? Could it be the regulator is getting hot and changes the idle mix at the end of my flight? I never had this problem on my Top Cap.

(in reply to Dave Shadel)
       Post #: 12

RE: YS 63FZ and UCANDO 46 - 5/24/2004 2:19:51 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Try richening up the regulator a bit, and maybe raise the idle speed a couple of hundred.

(in reply to rightflyer)
       Post #: 13

RE: YS 63FZ and UCANDO 46 - 5/25/2004 12:38:09 AM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		I will give it try. A 1/4 turn on the reg or less?

(in reply to Dave Shadel)
       Post #: 14

RE: YS 63FZ and UCANDO 46 - 5/25/2004 1:27:47 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Try 1/4 first, if it gets better try 1/2.

(in reply to rightflyer)
       Post #: 15

RE: YS 63FZ and UCANDO 46 - 5/27/2004 11:41:08 PM   
rightflyer



Posts: 709
Joined: 11/30/2001
From: Grove City, OH, USA
Status: online 		Oen more dumb question. I know how to adjust the lwo and high end needles, but the regulator.... A turn clockwise: Does it make allow more fuel or less?

(in reply to Dave Shadel)
       Post #: 16

RE: YS 63FZ and UCANDO 46 - 5/28/2004 3:22:04 AM   
Dave Shadel


 

Posts: 5407
Joined: 4/9/2002
From: Gardnerville, NV, USA
Status: offline 		Clockwise will lean the transition.

(in reply to rightflyer)