I've got the 140 blues
 

Hello everyone, I have a question about a 140 sport. Up until this time I have owned 3 110's without any problems. Now I have an issue with the 140 both the DZ and the sport. I initially had a DZ and had problems with it and eventually it went back to YS for repair. While it was in the shop I bought a 140 Sport, because I am more familiar with that system and have never had issues with my 110's. I started the 140 Sport for the first time and it fired right away but would not take full throttle it would detonate (lean) at 2 turns out on the HS needle so I richened the reg. CCW seemed to take care of the problem. I am turning 9100 max and turned down to 8700 with a 16X8 Apc. Ok, everything is fine until I did Troys 4000 test. The engine ran at about 4000 give or take 50-75 rpm but after a minute or so it would shut down with a puff of smoke. I tried leaning the reg but to no avail it still shuts off. Has anyone had this or similar problem. Just a last note, it idles at about 2100 and transition is good.

RE: I've got the 140 blues
 

Using 30% Heli Fuel

RE: I've got the 140 blues
 

Does it shut off with the glow igniter attached? If not it could be the glow plug has been contaminated from the break in process.

RE: I've got the 140 blues
 

Have you tried richening the regulator? Could be it's still just a tick lean.

David

RE: I've got the 140 blues
 

CHeck for air leaks. Valve cover gasket, back plate gasket, pushrod tube "O" rings. Clean and check regulator.

RE: I've got the 140 blues
 

Thanks guys, my first suspicion is the plug because there is a marked decrease in RPM when the glow igniter is removed. But, that could also be a rich condition. Yes? and if so, with the HS set from peak I am still thinking the reg. But, I will tighten all the screws and clean out the reg and see what happends.

RE: I've got the 140 blues
 

It would have to be pretty rich to make a marked RPM change when you pull the igniter unless the fuel the bad. How is the idle? Reliable?

RE: I've got the 140 blues
 

I should say the rpm drop is at idle, I am using fairly fresh 30% heli. I can idle it at about 2100 , although I should say it sounds a little rough meaning you can hear changes when it is running. It sounds steady then skips a little but does not stall. I really have not fine tuned the bottom since I have been playing with the midrange and reg. because of the shutting off

RE: I've got the 140 blues
 

What happens when you roll the throttle from idle to full? Does it transition smoothly, hesitate ir load up and stumble?

I tried the 4000 RPM method but still tweak my engines in the old way testing the transition just to make sure all is good.

<I really need to learn how to type>

RE: I've got the 140 blues
 

Yes,no problem with the transition, I just changed the plug and will try again tomorrow. I think if it runs good at idle and transitions to where I had it the other day, I am going to fly it like it is. Remember this is a brand new engine, possiby Troy is talking about an run in engine.

RE: I've got the 140 blues
 

If it is brand new I wouldn't be too concerned as long as it idles and transitions well until you get a bit a fuel through it. I am thinking the plug might have been compromised by the ring wearing in.

RE: I've got the 140 blues
 

Ok, engine is running and flyable, I was able to peak it at 9200 and pulled it back to 8700. Had some trouble getting it to idle but with a little tweaking it seems to be fine at around 2400. It just needed some patient tuning, I am going to run it like this for atleast a gallon and then start fine tuning it. Thanks again for all your help

RE: I've got the 140 blues
 

Happy to see things are working out for you. The nicest thing about the YS is once you get it sorted out it will be dead reliable, at least that has been my experience.

RE: I've got the 140 blues
 

I had very similar problems with my 140 sport engine during the summer. Very unreliable running all the time. Rpm waving up und down just like the engine was running lean, but surely it wasn´t. I tried to adjust the regulator and main needle and there was no help for this. I then checked everything: Tank and fittings, carburetor cleanliness, everything. Finally I had an idea: Fuel! I have always blended my fuels by myself and this contained 20 percent synthetic oil called Aerosave, which is a german product. 20 percent nitro and the rest methanol. Worked very well in usual engines I have had over the years.

I then tried similar blend with Klotz heliglow blended 20 percent as recommended. Klotz is very different oil than THICK Aerosave; its a low-viscosity oil and worked out very well indeed!! Now these engines are very easy to adjust and runs just perfectly as they should.

So, be aware of the fuel and if there is a doubt, try another blend! The problem may be as simple as that. Ys needs low viscosity oils and fuel to run perfectly!!

Best Regards to all pattern mates in the United States and greetings from HELSINKI, Finland! Check the map if you don't know the place.

Mikko Vuorela

RE: I've got the 140 blues
 

Ok guys here we go again, Engine was running fine, 30% Cool Power, 16X8 prop. It ran fine for approximately one gallon of fuel then it dead sticked. Since that time I cannot get it to idle reliably as soon as I pull the igniter it stops. I have changed the plug and removed the reg. and cleaned it, forced fuel through all the passages and am getting good pressure in the tank. Tansition is fine, it just wont stay running when I pull the plug. I am using the standard F plug or the YS 4

RE: I've got the 140 blues
 

Sounds rich. does it run normally if the igniter is attached? If so, I bet it is too rich on the low end. Keep backing out the low end until it doesn't sag after the igniter is removed. Maybe the air bleed is plugged.

RE: I've got the 140 blues
 

Sounds rich. does it run normally if the igniter is attached? If so, I bet it is too rich on the low end. Keep backing out the low end until it doesn't sag after the igniter is removed. Maybe the air bleed is plugged.

RE: I've got the 140 blues
 

Yes, this engine always dropped off when I detached the igniter no matter how far I leaned the low end, I thought it was the plug but still did it after I changed it. How do I clear the airbleed

RE: I've got the 140 blues
 

To clear or even check the airbleed you need to remove the throttle barrel from the housing. If you look by the throttle arm you will see a small keeper held in place by a screw. You need to pull that too and carefully push the throttle barrel out.

I'd pick up a new seal for the barrel first though. It is angled and depending on which way it was installed you have a 50% chance of having the throttle body cut a little semicircle out of it while pushing the throttle barrel out and make sure when you put the barrel back in you put the smaller side of the seal in first.

RE: I've got the 140 blues
 

Some of the 140 sports have had an issue with the air bleed hole in the carb not being drilled out large enough from the factory. I have one that I couldn't get to idle smoothly at anything less than about 3000rpms. I called YS and a tech there told me to take the barrel out of the carb and drill the hole in it out to 1/8". He said some got out with the wrong size hole. I did, and my problem was solved. The 1/8" bit only enlarged the hole a few thousandths, but it made all the difference.

If you've got your air-bleed screw backed out all the way, and if the motor dies as soon as you remove the ignitor, then it sounds like the low end is rich, and I'll bet that's your problem. Take the carb off, take the barrel out, and check the hole size. If it isn't at least 1/8", I'd suggest you drill it out to 1/8" and try it. This is the hole that the air-bleed screw partially blocks as the engine idles, and if it's too small, you can't lean the engine enough to make it idle correctly. Once you do this, you'll need to make small adjustments to the high speed and probably to the regulator settings, too, because the idle circuit is always working when the engine is running, no matter what the RPM, so it affects the mixture at all speeds.

Hope this helps!

David

RE: I've got the 140 blues
 

David,

Thanks for the info. That is a good thing to know.

Pete

RE: I've got the 140 blues
 

I was having idle issues with my 140 as well, and David gave me the same advice. My butterfly hole was no where near 1/8 inch. Not even close. Maybe mine was 1/16 or 3/32 at most. Anyway, I drilled it out, put it all back together, got it tuned good, and it hasn't missed a beat since..

RE: I've got the 140 blues
 

Oh, and I should add that I'm getting 9000+ out of an APC 17x8. I would like to try a 16x10, but it's flying so good with the 17x8 that I'm going to leave it alone. What a powerhouse. And this with YS/Saito 20/20 powermaster.

RE: I've got the 140 blues
 

I spoke with Richard Verrone of YS yesterday, he suggested the same modification of drilling out the hole. Only difference is that he says he has done that to "older" engines , it makes perfect sense to me if the hole is too small from the factory. Petec suggests I get another seal since it would probably be cut when removing the barrel any thoughts on this, where can I purchase one other than YS in Nevada which would take atleast another week.

RE: I've got the 140 blues
 

I'll look in my parts bin and if I have one I'll PM you. I live just ourside of Pittsburgh so it would take a lot less time to get there.