ys-110 what am I doing wrong  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> ys-110 what am I doing wrong
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ys-110 what am I doing wrong - 4/26/2008 9:52:48 PM   
mpalermo



Posts: 93
Joined: 3/28/2004
From: Bellville, OH, USA
Status: offline 		I am new to 4 strokes so this is where most of my issues lie.

I just cannot get it to run when I change throttle position when I take it from about 40% to WOT it just stops and fuel flows out from the carb.

I have the needle set as per the instructions to 1.5 turns and it is leaving a very nice smoke trail so I do not think it is running lean.

I remember another post where I have seen a backplate like this but I cannot find it, I believe the issue there it was backfiring and it could not be heard, I believe I am having the same issue here.

I am using a tru turn spinner with a double jam nut and after the run the prop is loose.

Any thoughts would be greatly appriacted.


(I will upload images later I am having problems getting it to wrok from this computer)

(edit, looks like I got it to work!!)


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< Message edited by mpalermo -- 4/26/2008 9:57:42 PM >
       Post #: 1

RE: ys-110 what am I doing wrong - 4/26/2008 10:32:40 PM   
rcdude7


 

Posts: 939
Joined: 4/12/2003
From: Maryland
Status: offline 		I am not a YS expert, but I do have a .91ac that runs great. I have learned that YS engines are thirsy beasts and always smoke, even when they may be on the lean side. Don't be concerned with the smoke, use a tach to set your needles. Fuel leaking from your carb when the engine is not running is (from what I understand) a sign of a malfuntioning regulator. This seems to be the most common problem with these engine so keep a spare reg diaphram handy. The diaphram is a thin silicone membrane and it is easily damaged.

Go to the YS forum and do some reading, there is lots of info there and I'll bet, all the answers you are looking for.

(in reply to mpalermo)
       Post #: 2

RE: ys-110 what am I doing wrong - 4/27/2008 12:21:11 AM   
Enrique-F3A


 

Posts: 64
Joined: 10/27/2003
From: Caracas, VENEZUELA
Status: offline
What fuel are you using, how much nitro ?


(in reply to mpalermo)
       Post #: 3

RE: ys-110 what am I doing wrong - 4/27/2008 1:55:10 AM   
mpalermo



Posts: 93
Joined: 3/28/2004
From: Bellville, OH, USA
Status: offline 		Wildcat 20% heli, I added 5 oz castor to it.

(in reply to Enrique-F3A)
       Post #: 4

RE: ys-110 what am I doing wrong - 4/27/2008 3:44:47 AM   
Enrique-F3A


 

Posts: 64
Joined: 10/27/2003
From: Caracas, VENEZUELA
Status: offline
In spite of the instructions manual says that the engine can run on 15 % nitro, my personal experience with YS engines, is that most of them do not run properly if the nitro content is lower than 30 %. I have a 91 FZ that only runs on 30 % nitro. I have tried to use 20 % and got bad transition and bad idle. Castor oil is not recommended with YS engines, only pure synthetic !.

Also try this: Take out the main regulator screw and carefully check the inside parts of the regulator, plunger and spring. Take out the two body regulator screws, remove the body and carefully check the silicone diaphragm for integrity. Clean all parts and assembly the regulator. Do not over tight the two body regulator screws, adjust the main regulator screw to be flush with the body. To avoid backfiring use a time delay glow driver !


(in reply to mpalermo)
       Post #: 5

RE: ys-110 what am I doing wrong - 4/27/2008 5:41:01 AM   
freakingfast


 

Posts: 702
Joined: 1/3/2005
From: mather, CA, USA
Status: online 		A lean run can spin a back plate or spin a prop. If this is what happened you could have thown the prop,double nuts or not. Keep everyone behind the prop arc. The 1 1/2 turns out is not set in stone but it's usualy a good starting piont. Try going richer. If I cant slow an engine down buy going rich something is wrong, stop. I don't see filters in your pics. Crud in the fuel system is the # 1 culprit causing problems on YS engines. This can easly happen when setting up a tank.

_____________________________

When in doubt, give it full power. The smaller
pieces fit easier in the bag! Revver Bro #201

(in reply to Enrique-F3A)
       Post #: 6

RE: ys-110 what am I doing wrong - 4/27/2008 5:51:18 AM   
freakingfast


 

Posts: 702
Joined: 1/3/2005
From: mather, CA, USA
Status: online 		By the way, I've had well tightened "C" clamps unscrew by vibration. I saw the test stand start to go and I caught it at the last second by the fuel tank .
At least tie the "T" handle so it cant turn. I now use two lag screws to hold it down.

_____________________________

When in doubt, give it full power. The smaller
pieces fit easier in the bag! Revver Bro #201

(in reply to freakingfast)
       Post #: 7

RE: ys-110 what am I doing wrong - 4/27/2008 7:59:16 AM   
isaacslaw


 

Posts: 169
Joined: 9/29/2003
From: Nicosia, CYPRUS
Status: offline 		I would have to say the engine is definitely lean. Be very careful with this engine and make sure you don't stand in the prop arc or in front of it It will shred aluminum spinners when it backfires and throw the prop savagely.

I would also say that castor oil in this engine might not be the best (don't flame me castor guys). I have a 110fz and had to spend quite a long while polishing my valve stems from the baked on castor oil it was causing all kinds of problems.

These engines are much much much different than two strokes. They are much different than other 4 strokes. You need to spend time to fully understand how they work and how they tune. Start with the regulator screw flush with the housing. Set your high speed needle at full throttle and make sure its a LITTLE bit rich. Then set your low needle at idle (remembering that the low needle is an air bleed and works the opposite of most two strokes turn in to richen, out to lean). If the RPMs rise at idle, richen it. If they lower at idle, lean it. Finally, set your regulator for good transition. If transition is sluggish, try leaning the regulator, but it could also need adjustment the other way. You may find that the regulator can only be set properly by observing what it does in the air.

With the YS 110, after every adjustment, you need to run the thottle up to full to sort of clear it out. You will not be able to tune it properly without doing this. Also, you must also check other things in the system fuel lines, fuel filters, tank pressure, etc. ALL of these things affect the tuning of the YS. Make sure all gaskets are set right and don't leak. Make sure all screws are tight but not too tight. YS requires patience to tune properly. Also, I do not know how many gallons of fuel are through it, but if it's new, you just need to run about 3 gallons through it before it finally settles down to its normal state.

THese are really tremedous engines, but take some time to figure out. THere is a thread called "YS Club" in the 3d forum where there is a lot of information from some very knowledgeable people. Also, the support forum for YS is really good. Good luck.

(in reply to freakingfast)
       Post #: 8

RE: ys-110 what am I doing wrong - 4/27/2008 8:06:58 AM   
isaacslaw


 

Posts: 169
Joined: 9/29/2003
From: Nicosia, CYPRUS
Status: offline 		OMG I am looking at the picture of your set up a little more carefully now and am not seeing a check valve. It looks like you also have a fuel line that is not hooked up to anything possibly a vent line open to the aptmosphere. This could be why you are lean. You must have a completely sealed fuel system. The check valve goes between the tank and the pressure nipple. The arrow needs to point towards the tank. You also need fuel filters in both of the lines. If your tank does not have enough pressure (or no pressure) the YS will always be lean.

(in reply to isaacslaw)
       Post #: 9

RE: ys-110 what am I doing wrong - 4/27/2008 9:11:55 AM   
Flyer95


 

Posts: 951
Joined: 9/21/2004
From: STOCKHOLM Akersberga, SWEDEN
Status: offline 		Hello

Run the engine without the spinner backplate until the needles are set correctly. YS engines usually run great on 10% nitro but more is better for maximum top end performance.
It seems like your main needle is too rich? Have the glowbattery connected and if it can pass thru midrange and get to full speed then you know the main needle is too rich. If it stops even with the glowbattery connected then it can be lean or there is another problem.

(in reply to mpalermo)
       Post #: 10

RE: ys-110 what am I doing wrong - 4/27/2008 11:31:03 AM   
nonstoprc



Posts: 969
Joined: 9/9/2003
From: austin, TX, USA
Status: offline 		When you disconnect the vent line from the tank, does the tank de-pressurize? If not, something is wrong with pluming. It is important for the engine to receive pressurized fuel flow.

The screw on the regulator body can be adjusted. Screw it in to lean, and out to rich. Do it in 1/8 increment.

From your description, it seems the engine is lean in the middle because of fuel starvation. You could try to turn the regulator adjustment screw 1/8 turns out to see if the situation improves.



< Message edited by nonstoprc -- 4/27/2008 11:33:10 AM >

(in reply to Flyer95)
       Post #: 11

RE: ys-110 what am I doing wrong - 4/27/2008 4:08:32 PM   
mpalermo



Posts: 93
Joined: 3/28/2004
From: Bellville, OH, USA
Status: offline
quote:

ORIGINAL: isaacslaw

OMG I am looking at the picture of your set up a little more carefully now and am not seeing a check valve. It looks like you also have a fuel line that is not hooked up to anything possibly a vent line open to the aptmosphere. This could be why you are lean. You must have a completely sealed fuel system. The check valve goes between the tank and the pressure nipple. The arrow needs to point towards the tank. You also need fuel filters in both of the lines. If your tank does not have enough pressure (or no pressure) the YS will always be lean.


I took it apart and was just about to empty the fuel tank when I took that picture!!

I took the diaphram apart last night and put a fuel fiter in line, I cannot believe I overlooked that, see if I have better luck today.

@nonstoprc

Yes the tank is pressurized, when the engine quits it seems to push fuel through the plumbing and right out the carb.

Is that normal? do you need to depressureize each flight?


(in reply to isaacslaw)
       Post #: 12

RE: ys-110 what am I doing wrong - 4/27/2008 4:15:56 PM   
rcdude7


 

Posts: 939
Joined: 4/12/2003
From: Maryland
Status: offline 		It is not normal for the fuel to leak out through the carb. I depressurize only to refuel, or defuel the tank.

(in reply to mpalermo)
       Post #: 13

RE: ys-110 what am I doing wrong - 4/27/2008 4:45:06 PM   
nonstoprc



Posts: 969
Joined: 9/9/2003
From: austin, TX, USA
Status: offline 		Yes. fuel is pressured all the time. I de-pressurize after each flight to avoid fuel being pushed to the carb/engine. also a good idea to do so at the end of the day.

Is the screw on the regulator body set flat with the body itself? That is usually the recommended setting. Try to screw it out 1/4 turn. The screw controls the amount of fuel being delivered to the carb. I bet it was not enough in your early run.


(in reply to rcdude7)
       Post #: 14

RE: ys-110 what am I doing wrong - 4/27/2008 6:13:41 PM