YS-53 Carb Tuning Problem? Not any more baby she rocks!! (Full Version)

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Crash King -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (3/26/2002 8:31:07 AM)

I have a new ys 53 that I picked up. It was NIB but the guy I got it from had messed with the low end needle, I set it up per the instructions on the high end but I cannot get it to run properly.
It will not idle at all, if I remove the glow starter it dies instantly even at full throttle. I have replaced the glow (Enya #3) with a new plug two times.

If someone could tell me what to set the low end at I think this may be my problem. I have tried it at 1-5 turns out with little improvement. When I advance to full it will increase, but not near what it should, guessing 5-7K rpm. If I get a starting point that would help. Also it is missing badly, I think detonation, but not sure. I hate to run it in its current state.



deputydog -> ys-53 (3/26/2002 9:52:33 PM)

First question is whether this is a 1st or 2nd generation 53? 1st gen does not have a low end adjustment at the carb while the 2nd gen does!
OK, now make sure your pump(big screw on bottom) is flush with the housing. This is a good starting place. 2nd item is please use an OS type F or a YS plug. These handle the heat much better than other 4s plugs. 3rd is fuel. Pease use a 2 stroke 15-20% fuel. DO NOT USE 4 Stroke fuel(it voids the warranty!). If you have the 2nd gen engine then you probably wont touch the pump and only adjust the low end on the carb. Turn this low end out 4 1/2 to 5 1/2 turns.
Start the motor, bring it to top end and adjust hi speed needle to run slightly rich, now bring it down to a high idle. Pull the glow driver off and see what happens. If its running, check transition and adjust low end accordingly. It it stopped, turn low end in 1/2 turn. If it's 1st gen then turn pump in 1/8 to 1/4 turn. Try again!!!

If you still have problems then pull the pump and check the diaphram and look for any contaminants. Clean and try again.

Let us know!



Crash King -> Deputydog to the rescue! (3/26/2002 10:43:43 PM)

Thanks Deputy,
I suspect I have a second gen as I have a low-end screw just in front of the high-end screw.

I am using 15% Nitro with 20% oil content of 50/50 mix of Castor and Synthetic for break in. Will use 20/20 later!

The Engine is mounted inverted so the fuel pump screw is visible, but looks to be about .125(1/8") above flush.

The low end adjust ment was 2 turns out, so this may be the problem. I will adjust to 5 and try again.

I could not get an OS F to work at all; the Enya #3 seems to be a bit hotter plug.

Thanks, this is just what I needed?



cloudniner -> Regulator Cover?? (3/27/2002 3:38:04 AM)

Is there a difference in the way the regulator cover can be put back on. I took it off and didn't really pay attention. There is a 'bump' one side. Towards the prop or it don't matter...

Thanks

RSN



can773 -> Re: YS-53 Carb Tuning Problem? (3/27/2002 3:49:35 AM)

[QUOTE]Originally posted by Crash King
Also it is missing badly, I think detonation, but not sure. I hate to run it in its current state. [/QUOTE]

This sounds of low pressure or no pressure. Replace or clean check valve, replace tank and all lines.

Also remember that the low end is air bleed, so out is lean and in is rich.

One other point at idle (<2500 rpm) the engine does not rely on pressure to feed itself, only above this does the fuel start to become injected, if running right at idle or close anyways but above idle it goes bad then you likely have a pressure problem. It will behave lean if you have low pressure.

Do the simple things first, valves, plugs, check valve, tank, lines etc. Only after all the has been eliminated dig into the motor. I have too many times seen people to be told to rip the reg apart only to make it worse and in the end discover that their check valve was bad ;)


Cloudniner

Toward the prop



deputydog -> Reg cover (3/27/2002 5:15:02 AM)

If I remember the tit goes aft. There should be a corresponding flash and the side to the prop is flat and smooth. I'll have a look when I get home and let you know. Sound like the pump was way too far out. I have yet to turn one counterclockwise or "out". You almost always have to turn them in!!!!. I've had 1 or 2 YS-91's that I never even touched but that was also because they also have the low speed adjustment on the carb. I've had both 91's and 120's inverted and am about to mount a 63 inverted to a mustang. This usually calls for just a smidgin leaner on the low end.
The previous thread had some truth in that you usually dont pull things apart if you are at idle and have no top end. Well, My understanding is it's NIB, so no need to check valves. Also, It ran at high rpm but died when brought to idle. This would be a reason to check the Diaphram for holes. Don't know what the previous owner did to it but every YS i've pulled out of the box has ran like a champ from the git-go (just like OS!!) After the second tank you adjust the low and hi ends and then go fly.

Talk to ya later!



Crash King -> Well No Luck (3/27/2002 6:18:42 AM)

I have had the low speed screw all the way out and all the way in. It actually started to run better when the low speed screw fell out.

I replaced the Check valve with a new one. I screwed in the regulator 2 turns but it still would not lean out. I can actually screw in the high-speed needle in all the way and it just leans out a little. I checked the diaphragm and it looks ok at least no obvious holes. It has pressure to the tank as when I remove it has a definite pressure release. I have removed the filter and put in new fuel lines. I don't think it is a blockage issue as it is running rich, not lean. I guess I will screw in the regulator another full turn on so to see if that helps :confused:

Any other ideas??? Also another new glow plug and it still will not run if I remove the glow igniter.



m.gramling -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (3/27/2002 6:31:18 AM)

http://www.ysperformance.com
this is YS homepage. Click on tech tips. Then click on YS Doctors link. This will give you a some solutions to fix your problems.

It also tells you how to set the low end once you start getting the low end problem fixed.

most people think that setting a low end on a YS is hard. I only own the YS 63. But read their instructions. It makes you wish all motors low end was this easy to set. This method works. i do it 2 times a year. Once in spring/summer time, and once in the fall/winter

Also, if all else fails. Give them a call. so far they have been real helpful with me.

Once you get the problem worked out you will love this motor. I love my 63. I wish more of my motors ran as good as my 63. But i guess they would if I only bought YS.

Hope this helps.



PineBaron -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (3/27/2002 8:13:31 AM)

A word about the low end needle. I don't have the 53 but a 63 and 91 and the low end needle works opposite to the high end needle, unlike other 2 or 4 stroke engines. Clockwise movement is to make it run richer and counter clockwise is leaning the engine. A good point to start is 1 1/2 turns out from fully closed.
Any change should be done in 1/8 turn steps and using a tach makes the job a little easier. If setting the needle does not help then turn to the regulator. The regulator should not require very much change from the flush position; a new engine may need a little adjustment though rare, out of the box unless there is a fuel contamination problem, high elevation or some 'grit in the system'(in a used engine, unless it came in through an unfiltered fuel line).

When changing fuels (nitro content) only the high speed needle may require an 1/8 turn in or out depends on wether you are going up or down in nitro content.

Vim
Theres nothing like the YS.. All your motors can be like the 63 if all of them are YS.. just kidding.. I do own one other brand of 4 stroke.



Crash King -> Well there is light (3/27/2002 10:48:21 PM)

I am making some progress; I can now get the engine to run w/o the glow igniter. It will idle down to about 2700 and will top out at about 7600 with a 12/8 prop. The instructions say it should hit 9000 but I hope with some time it will improve. Do these numbers sound about right? Am I looking for too much with just 2 tanks on this engine? Let me know, and Thanks for all of the replies.



PineBaron -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (3/28/2002 5:00:10 AM)

I found my 63 performed best for my plane and fuel with a 12x7. This is not to say your 53 will not perform best with other props. The bottom line is, one should experiment with various props for a particular plane for your particular type of flying style before deciding what prop to finally use. Are you looking for speed, 3-D, scale speed, sport flying etc. etc.

Others on this forum can report their experiences with props on the 53 as I do not have any statistics for the 53.

Vim



deputydog -> Asking too much!!! (3/28/2002 5:21:06 AM)

I feel a 12x8 is too much prop for the engine. try a 12x6. I use exclusively an 11x8 on my 53. It's pushing about 10,800 rpm. This little engine is real happy up at those R's. I've had the engine since they first came out. For the first time I had to break it down to replace the crank because I over tightened the lock nut and sheared off the threads. So I went ahead and replaced O rings too. The piston wiped clean and looked like the day i bought it! I love this little engine.
Everything will improve over time but you should be getting close after 2 tanks. My idle is about 1850 rpm. Again this may be due to prop size. Idle has to increase to continue to sling a larger prop! If you are going to fly 3d with it then try a 12x4/5. otherwise stick with a 10x10 or 11x8.
Transition from idle to hi speed should be instantanious. If not then continue to adjust the low end. Back off the hi end a hair and then readjust after you do the low end.
Sounds like we are almost there!!!!



Crash King -> More Progress !!! (4/2/2002 6:39:03 AM)

Well now I can get it to run up to 9500 with an 11x7 prop and will idle down to the low 2K's. It leans out a bit but I think with some more time it will get there.

How many tanks until this baby starts to be broken in?

I think I am on the rich side, but occasionally it will backfire or detonate. Not sure why but only happens when I first start it.

I hope this is really progress, I feel more like a mechanic these days than a RC pilot.

I hope this will pull my Tiger 2 around well, after all this I might throw this engine away if it continues to give me problems. :mad:

Save begging for a free engine emails guys, just a figure of speech. :p



Crash King -> Regressing I guess (4/2/2002 10:07:43 PM)

Well not so fast,
Now when at full throttle it will hold at 10K-10.300 but will fall off after about 15 seconds. I am not sure but it appears to either get rich. Occasionally it will pop and stop (pre-detonate)
When I drop the throttle it will drop to about 2200 and then climb up to over 3K.

Settings are
HS- set to approx 2.5 turns out
LS - set to 3 1/2 turns out
Regulator Screw is just about flush.
Brand new OS-F
Engine is mounted inverted.

What next?



deputydog -> some more! (4/2/2002 10:18:43 PM)

Hey Crash!

Is the system holding pressure? That's a big item. Try turning the regulator in about 1/8 to 1/4 turn. Richen the low end and readjust it. Running inverted is going to require you to get the low end pretty lean.
You did not mention what fuel you are using. Is it fairly new?

How is the transition from idle to hi speed? Also do all this without glow. Leaving the glow on will cause the engine to pre-ignite. When you first start up you need to let the motor run for a minute or two to build up pressure. Then advance throttle somewhat slowly to clear it. Bring back to idle and then jam it. Should have instant response.



Crash King -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/2/2002 10:39:23 PM)

I am running a product called Riches Brew. It is a local product available in Texas. It is 15% Nitro and 20% oil of which 10% is Synthetic and 10% is Castor. New Bottle opened last weekend.
Only plan to use this on break in, after that it’s 20/20. I think it is a good thing that I am using a fuel with Castor as much trouble as I am having with the settings.

By turning the fuel regulator screw in that will reduce the fuel pressure !! Yes or No

I will try the above mentioned. How can I tell if the system is holding pressure? When it dies I pull the check and it does release pressure?

It will detonate when the glow is attached, but occasionally when it is not. Is detonation because of a lean or rich situation? I have read the YS power tips MANY times. The Detonation is worse than Rick says. Sounds real bad.. It did it 4 or 5 times this morning.
Thanks Deputy, I really appreciate the help
Crash



Hobbsy -> YS stuff (4/3/2002 2:37:56 AM)

Crash, if it still speeds up after comming down to 2,000 it is still lean on the low end. Also, do yourself a favor and forget about the number of turns in or out once you have used it to reference the starting place. PS, I have a .53 comming next week when I get back from Toledo.



can773 -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/3/2002 3:03:26 AM)

[QUOTE]Originally posted by Crash King
I am running a product called Riches Brew. It is a local product available in Texas. It is 15% Nitro and 20% oil of which 10% is Synthetic and 10% is Castor. New Bottle opened last weekend.
Only plan to use this on break in, after that it’s 20/20. I think it is a good thing that I am using a fuel with Castor as much trouble as I am having with the settings.

By turning the fuel regulator screw in that will reduce the fuel pressure !! Yes or No

I will try the above mentioned. How can I tell if the system is holding pressure? When it dies I pull the check and it does release pressure?

It will detonate when the glow is attached, but occasionally when it is not. Is detonation because of a lean or rich situation? I have read the YS power tips MANY times. The Detonation is worse than Rick says. Sounds real bad.. It did it 4 or 5 times this morning.
Thanks Deputy, I really appreciate the help
Crash [/QUOTE]

Detonation is real bad, a good way to mess up your motor. If this a happens at higher rpms, then it is most likely being cause by lack of pressure. The tank going pssst doesnt mean you have pressure, if you have 1 psi it will go pssst, but you need a lot more than that for it to run. A lack of pressure causes lean running, YS motors do not tolerate lean running very well, if it has been run in this condition for any extended amount of time I would likely say that you have damaged your piston and ring, possibly the liner. If that is the case get on the horn to Richard@YS Performance, let him know what is going on. He may tell you to send it back, dont hesitate they are real good and will get it working for you.

They do such good work there that once my engines start to act up they go back get tuned up by Richard and when I get them back they are running like clocks.



Crash King -> Thats all folks (4/3/2002 10:58:27 AM)

Had a nother guy look at it and finally a YS guy here take a swing. Said something is not right, send it back to YS, Apparentyly some of the early 53's has some issues, he thinks this is one.
Thanks for the help.



mlevings -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/3/2002 11:37:16 PM)

I've been flying YS .53's for 4 years. I've been through the same symptom that you are experiencing. The most noticable change that I made was to switch to 30% heli fuel. I had 2 engine that had the exact same problem you are having. The 30% fuel has worked out great on both. BTW I have been using OS #F plugs and have NEVER had to change one on a 53.

Mark



Crash King -> Its flying but not very good performance (4/5/2002 8:54:04 AM)

I finally got the 53 up and running, it will drop down to 2300 and will run up to 10200 or so. But it will not hold 10200 with an 11x8. It is on the 4 the tank but does not seem to pull the Tiger 2 around very well. I will give it some time. But if it does not suddenly come to life I think this 53 will be retired soon. I know many of you love these engines, but there is a point and time when I get tired of being a mechanic and would like to be an RC pilot. :rolleyes:



Scorpionjack -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/5/2002 9:23:06 AM)

Crash;
The YS 53 will run in excess of 11,000 with a 11 X 7 APC Prop and 25% Fuel OS F plug.

The Tiger is a 61" Wing max weight of about 5.25 Lbs. If that plane won't fly with a YS 53 turning those RPM's then you have other problems not the engine.
You say that your already running 10,200 Have you experimented with props?
I hear what your saying about flying and not tinkering! But once that motor is set you virtually just fill it up and go.

Email me and I'll run mine up this weekend with 15% and give you the numbers as well as the settings. It's Cold outside and snow but I 'll still do it.



deputydog -> more problems (4/5/2002 9:45:38 PM)

Hey Crash,

Glad to hear you are still hanging in there with this! This is the most trouble I've ever seen from a YS. I've owned quite a few and put a couple in the dirt and rebuilt them. Taught quite a few people how to adjust them. But there is nothing like hearing it yourself!
Just for giggles, when the motor is COLD please pull the valve cover and with the piston TDc check the valve lash. You should have about a 10 thou gap. This equates to a slight opening between rocker arm and valve.
Also when there is no fuel in the tank, relieve pressure and then connect everything up. With the throttle full closed turn the prop over about 6 to 8 times. Let the motor sit for about 1/2 hour and then pull press side. It should still have noticable pressure.
Sometimes its good to start fresh, Try to put everything back and rich and start the readjustment over. Either way you should be able to run up full power, adjust the HS needle and have it run good without messing with the low end.



Scorpionjack -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/5/2002 10:21:40 PM)

DD;
Why do you have your valves set at 10? mine and all of my other YS's are set at 5 and never miss a heartbeat.



can773 -> YS-53 Carb Tuning Problem? Not any more baby she rocks!! (4/5/2002 10:40:43 PM)

10 thou???? ............ 2 thou is more like it. I am surprised that your engines even run properly with that much gap.



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