How well did your YS run after sending it in for service?
 

Since the change at YS service, I seem to notice an increase in "I got my YS back from service and can't get it to run right". Now I expect some minor tuning after service, but they are supposed to be run tested and factory set. I've never had but a minor adjustment to do on new engines.
I've got several 110s to send in, but I'm concerned about if they will come back better or worse. Could be I only see the problem updates in the forum which is making it seem like a problem. I'd like to know how many have sent in their engine and had NO trouble when it came back.

RE: How well did your YS run after sending it in for service?
 

I've talked with Richard on the phone, from service, and found him to be helpful and respectful. With the exception of certain events throughout the year, service has been a quick turnaround, and I have never had to do anything but tune my engine for my environment when returned. Dave Shadel was always great to work with through here, and I have found no negative impact whatsoever after Troy taking over.

RE: How well did your YS run after sending it in for service?
 

YS service continues to be a problem with no response to phone messages or e-mails. When you do get someone on the phone, they are courteous but lack a decent command of the English language. The guy I spoke with ended every sentence with "OK?", and acted like I was wasting his time asking questions about my new engine.

RE: How well did your YS run after sending it in for service?
 

Is anyone able to direct me to a website where I might download program to run simulation of UCANDO 60 (or 40) on GFlight 3.5?
Thanks,
Chepenik

RE: How well did your YS run after sending it in for service?
 

I've always had a very positive experience in dealing with the service department via the phone, and when I've sent things in.

Jimmy Skids

RE: How well did your YS run after sending it in for service?
 

There has not been any change in YS service. The only change is that YS Parts and Service now is the sole owner of the YS performance import business that they were partners 50-50 in before. The only change has been on the importing side. Richard Verano has been the owner and operating of YS Parts and Service wince 99 when Dave Shadel and he started YS performance.

They are very customer service oriented and work hard to keep folks happy. As with any operation I know its tough to keep everybody happy all the time. This forum is the opportunity to get help with your engines if they have problems.

I know for a fact that all the engines that are repaired are actually run at YS Parts and Service before they are sent back to the owner. They test the engines and make inital settings. If it leave the service dept it has been run and setup.

Not always is an engine problem with the engine. Fuel, tanks, plumbing and other issues are often in the mix as well. YS Parts and Service often spend hours upon hours on the phone helping customers get things going. This forum is another resource that is sponsored by RCU and YS Performance-Parts and Service.

Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

Ignore my message regarding UCANDO 60 download; have found it is available in Expansion Pack 1 from Real Flight.
Chepenik

P.S. Have found Richard at YS Service exceptionally helpful, knowledgeable, and courteous; costs for repairs and service very reasonable as well.
Chepenik

RE: How well did your YS run after sending it in for service?
 

Myself I have only sent back a couple of engines the 91 FZ for a gas ported piston under warranty and a 63 that nobody could find what was wrong. But Richard at YS was more than helpfull he sent me a new in the box 63 S in exchange for the older 63 . I have talked to Richard as well as Troy and Dave several times and found them all to be of great help in answering any problems I may have had.
Myself I have my doubts that YS service is sending out anything that will not meet there requirments on purpose. But were all human and I suppose that a problem could be missed ,but where they run the engines before there shipped its very unlikely.
Iv'e said this more than once and will say it again, Most of the YS engines problems are created by the new owners that don't fully understand how to set the engine up correctly,or bother to read the instructions.

RE: How well did your YS run after sending it in for service?
 

A guy in our club just got his back and it ran great for 5 flights, then went back to doing what it was originally sent in for. They replaced the regulator and some internals. NEW 110S. He's not a happy camper.

RE: How well did your YS run after sending it in for service?
 

Myself I feel a phone call is in order to YS and talk with Richard. What is the engine doing or should I say not doing , besides not running right.
The 91 FZ I sent in runs like a dream now after the new piston was added,thats really all I can go by myself all of my other repairs I did myself with the help of central hobbyies or YS for parts.
The engine ran ok for 5 flights then started acting up ,so I would think it had to run fine when it was bench tested at YS. A prob that shows up that soon does not look to good I have to admit but I think a phone call can get it straigtened out .The trouble is theres shipping and down time again, and if your friend is like me I didn't buy a engine to ship through the mail I bought it to fly a plane.
Let us know if theres anything we can do to help your bud out, i'm sure that whatever the engine is doing isn't the frist problem of that sort and maybe can be diagnosed right here.

RE: How well did your YS run after sending it in for service?
 

If it was regulator related issue then perhaps something has changed. Dirty fuel, bad fuel, air leak in the fuel lines or other issues. Obviously it ran well for the first few flights and now is not. Likely this means its something with the fuel, the glow plug, the fuel system or the operator.

This may sound a bit like a cop out...but obviously there is something in the environment if it works when it gets setup by YS and then after a few flights shoots Snake eyes.

These engines just don't do that. If they work they work...and if there is a problem they don't. But mechanical issues don't tend to develop in 5 flights. Usually its dirt in the fuel system. A piece of dirt or debris in the regulator....Is a likely candidate. Fuel should be filtered well.

Glow plug is another issue. If the engine is fairly new the plug could have gone south. this happens often when the engine is breaking in. In the first couple gallons its not uncommon to go through 2 maybe 3 glow plugs.

The the owner/operator starts twisting on adjustments trying to get it to idle as the plug is not making the proper heat...he gets the motor lean and then other issues arise.

My suggestion is to make sure the fuel if filtered well. Try at first to back flush the regulator since its a 110S....then change the glow plug.

What fuel is he using, what plug, what prop...there are so many variables before you throw stones at an engine that was working properly and now is not.

Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

Blaming the user for all the problems is a cop out. The engine in question is run on CP 30% Heli and OS F plug. After 5 good flights just back from service(?) it is doing exactly the same thing as when it was sent the first time. The airplane flies perfectly with a YS 110 FZ installed. The operator is an experienced modeler who has run many YS engines over the years and his comment after having problems again was that he'll never buy another YS engine as the company has gone to the dogs.

RE: How well did your YS run after sending it in for service?
 

Flyer 69,

Can you describe what the engine is doing that is not right? Another item to add to Troy's check list is checking the valve gaps. I have see the exhaust valve gap increase after service. (the valve components seat in after reassembly) If the exhaust valve gap increases, it will cause the engine to load up.(Does not let all of the exhaust out - chokes the engine) So the owner will lean out the top end of the engine but this will not help. If the valve clearance gets bad enough and the owner keeps turning the high end adjustment, the engine will run like crap. This is common place were guys will not check valve clearance and chase the running of the engine will the high and low end adjustments. Lets turn this post into a way to help solve your friends engine problems. Could he post details of the engine setup and conditions at which the engine does not perform? There are a lot of guys here which have years of experience running YS engines in competition. For example, Troy flies 500 + flights a year.

As far as my experience with YS engines and service, it has been all good.

Inertia

RE: How well did your YS run after sending it in for service?
 

If your friend sends his engine to YS Parts and Service they will honor the warranty.

I know for a fact that all repairs are run before they leave the shop.

Does your freind have a good glow plug in it? You said it was an OS F...that doesn't mean it was a working plug. Just becasue it glows doesn't mean its working.


If there is aproblem mechanically with the engine YS Parts and Service will fix it under warranty.

Like I said there are lots of enviromental issue that go into an engine running properly. Obviously you guys know what you are doing and you don't need me to help with the problem. The purpose of this forum is to help guys with engine problems. This is not a complaint area.

If the problem continues then send it to Service under warranty. The service department is very good at what they do. perhaps there is a problem that was missed. I doubt it not froma stand point that they don't make mistakes....but from a stand point that it ran properly for 5 tanks.......now its not. Like I said before lots of environmental factors....I suspect a bad glow plug or dirt in the fuel system.

maybe its just a loose bolt and an air leak. This can happen in a few flights also.

Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

My 110 ran great after service. YS does need to have some type of IQ test before selling them to just anyone.

RE: How well did your YS run after sending it in for service?
 

The new 110S that never ran right before or after service now resides at the bottom of the lake adjacent to our flying field. Rather than deal with the hassle of sending it in and waiting another 30 days, he used it as a fishing weight.

RE: How well did your YS run after sending it in for service?
 

Thats too bad. Not everyone should run YS engines. Sometimes its just a little much for some folks to operate. Thats Ok there are lots of good products out there in the market today. I wish your friend and you good luck with those products.

I know there is a fairly high demand for used YS engines. Many Many people including myself have engines that are 10-15 years old and they are still running them. Perhaps a sale of the engine or some effort with the Importer could have resolved the issue.

YS Parts and Service is not the manufacturer of the engines. Just Like Hobbico doesn't make the OS engines they import. Instead YS Parts and Service works very hard to keep YS customers happy and taken care of. Obviously there will always be unhappy folks. Thats too bad. Good luck to you and your friend with future products.

This forum is not for discussion rather it is a support forum. Since nothing of substance is coming from this thread instead it seems to be a complaint area and a opinion forum.


The forum rules are stated at the top of the pages.

I have moderated this forum in a very up front way and tried to keep as many people covered as possible. I have stayed aways from closing of threads as I have tried to keep things a little more open and free flowing of ideas and thoughts to solve people engine problems. Its not a place to post complaints. You can do that at

www.yspartsandservice.com

The purpose and intent of your post is not helping the forum or other folks with support for their product. So lets get back to helping folks with their engines and questions.

Troy Newman
Team YS

Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

Send my YS FZ110 service and after 3 months, I arrive the motor with he himself problem. And the worse thing is than nobody knows as it is the problem.

And the worse thing, is than I had to buy a Crankshaft (u$s 62) to prove if that is the solution, and is a motor that until now never I put it in an airplane.

RE: How well did your YS run after sending it in for service?
 

Every problem that I have ever had in the pass with my YS engines have been resolved right here, in this form. I thought I knew it all when it can to engines, but the ys engines do have quite a learning curve. I currently have a half dozen YS engines. Now that know how to tune them, they are all great running engines.
So to answer the question: How well did your YS run after sending it in for service? I would say: without any problems. The problem had always been me.

RE: How well did your YS run after sending it in for service?
 

I am looking for some help with my 63s.I have put three gallons of ys 20/20 thru it and loved every flight. It is in an 80 inch goldgerg cub. It used to do unlimited vert and now i have trouble getting enough power to do a simple loop. It smokes alot more than it did when new. I have tryed to adjust mixture for this but it only makes it run lean and get hot.I have replaced the plug with a ys plug twice. I have checked and re-checked valve clearence. I do not have a compression testor but this motor never seemed to have a ton of compression from new and it ran perfect. It might just be time to send it in to be freshend up but berfore I do that I am hoping for a few more things to try.

Thanks

RE: How well did your YS run after sending it in for service?
 

skidd1000 I would strart out at ground zero for the needle settings and retune the engine like it was a new broke in engine. If the smoke still continues I would do a rebuild on the reg and do a test on the check valve to make sure its holding pressure ok.
New plug and valve settings are very important ,sounds like you have covered that already. Also check every screw on the engine to make sure none are slightly loose. Especially the cyl to block screws.
Do one thing at a time and unless the engine is just tired and in need of a rebuild you should be able to pin it down and solve the issue W/O pulling to much hair out.

To much smoke indicates a rich mixture and that alone will cause a loss of performance, my money is on the reg needing rebuilt or some dirt in it.
If you decide to redo the reg check the hole size for the plunger for alot of excess slop they wear over time and can cause a rich condition due to the silicon piston not sealing correctly.
Good Luck and let us know.

RE: How well did your YS run after sending it in for service?
 

Thanks cyberwolf. I will try those things and get back to you.I think the check valve is fine because I can still get pressurized fuel out of the tank 30 minutes after a flight. I have never taken the regulater apart.It does not look to complicated.

RE: How well did your YS run after sending it in for service?
 

Skid,

if the mixtute is not rich...and its smoking really bad. Then its likely a piston, ring or cylinder issue.

If the piston or sleeve is scored or damaged it can get a bunch of blow by and this will make the engine smoke a ton...and not make any power. It will also make the engines run very hot.

It is very very unlikley that a regulator issue will cause the symtoms you are seeing. If dirt gets in the regulator or a regulator problem is usually an intermitant one, or the engine runs inconsistent. Also is the regualtor is an issue its likely that the engine will be really rich or really lean depending how its running.

Smoke trail is not a sign of being rich with the 4 stroke engines. When they get really hot the oil burns and this makes tons of smoke. So you don't set the engine per the smoke trail. This ius especially the case with the 30% heli fuel. The oil is a very low viscocity oil and will burn when it gets in the exhaust system. So if its way too rich the exhaust won't get up to temp and the smoke may be less. If the engine gets really lean it will make super heat and the oil will flash and burn off making it look like a smoke sytem.

So basically you need to follow the rules on Peaking it and backing it off 200-300rpm from the peak. If this gets inconsitent and the engine is smoking like heck....but is acting really lean...then it is likely a scratched up piston or sleeve.

To answer that question do you fly off grass or a dirt field? If so then it is common to injest some crap from the runway surface.


Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

Troy the reg on one of my 120 was shot ,the hole where the plunger goes thru was worn out and I got a very simular situation as Skidd1000 is getting. The plunger wouldn't seal every time , and guess what, the engine smoked like a train untill the excess fuel was burned away.
Since your not dealing with a crankcased engine and oil rings and oil is mixed with the fuel why would a bad ring do anything more than a loss of compression and poor performance I can't see where it would smoke more or less.

RE: How well did your YS run after sending it in for service?
 

My .91AC just came back from YS after about 10 years of me fiddling around trying to make it run right and failing, mostly because "who needs to read the directions when it's new" syndrome. I guess those backfires when I tried to crank it at idle throtttle and no tank pressure blew out the gaskets (head, cylinder, backplate and airbox). I can't remember in all that time ever landing with a running engine, but after reinstalling it and flying Sunday all I can say is WOW! Consistent 1800rpm idle 8800 with a 14x12APC. Now I love it as much as I do my .63 I've had for several years, and hope my 140 sport and 140 DZ are just as good.

Thanks YS guys!!!

Roy Aultman

RE: How well did your YS run after sending it in for service?
 

If the piston/cylinder or ring is scored, the engine will have excessive blow by. This blow by puts already hot, partially burnt charge down below the piston, and down where the next charge is being prepared by the super charger system.

This blow by is mostly oil, since oil doesn't burn as well as nitro and methanol, the next charge is super rich in excess oil that is already hot. The next time charge enters the top and does its thing. Now the some of the excess oil flashes off making the excess smoke, from too much oil in the fuel...and you get an very incomplete burn due to the leaking past the piston and ring, and the in combination with the excess oil it doesn't want to burn as well.


If the regulator was not stopping the fuel because the plunger was not seating the the excess fuel would make the engine rich. Very rich, but it would not change the amount of oil that is getting burnt. It would pump excess nitro-methanol, and oil in the same ratio tot he engine....So the engine would tend to smoke a bunch at idle or mid throttle as the engine is trying to burn too much fuel. But at the High end you could likely needle it down far enough to get the mixture correct for full throttle.

On the blow by side of things...the engine will act like its rich because its not burning correctly due to the leakage past the piston, and its also combined with the excess oil from the last charge that doesn't burn well. So the needle gets set leaner to clean up the "sounds rich condition" but in reality you are just restricting the amount of nitro and methanol even more. Now add in that oil from the blow by and charge is now even higher in oil content and it makes things worse and worse....


If you regulator sticks open then the excess fuel will flood out the glow plug. Leaning the high speed can help at full power. When the piston-ring is leaking the excess heat will not put the glow plug out but there becomes lots of oil to lube the engine but not enough fuel, so the engine starts to burn the oil, and gets hotter and hotter trying to keep up.


Troy Newman
Team YS

RE: How well did your YS run after sending it in for service?
 

hey troy I have A 140 fz that has been giving me troubles. Its had just under 2 gal. of fuel through it and I just had to replace the head gasket.This went well...but now when I run it at lo rpm fuel drips out of the carb. Its mounted inverted. Anyway I have flown it A couple times thinking it might fix itself but no.It runs weak and smokes A lot at low throttle,then when it dies fuel poors out the carb... Any good advise for me. OR should I send it in. thanks Patrick Liebo Gatlinburg TN

RE: How well did your YS run after sending it in for service?
 

Hey Troy. Thanks for the info. I do fly at a sod farm, sometimes on grass and also on the fresh cut dirt. I do not have any air cleaner on the carb so I would bet that you are right about scored liner on piston. The power has been getting progressivly worse. Is this a job better left for ys service?Ps I did take apart the regulator and did not find anything that looks out of the norm. Im sure that I can find someone at the field with a compression testor, what kind of reading should I get with the ys 63s?

RE: How well did your YS run after sending it in for service?
 

Let's move these discussions to a new thread.


Patrick, On your 140FZ, the regulator is not closing...the question is why is it not closing...Could be dirt or debris in it. It could be that the regulator is just too rich, and that is why its not closing. Another option is when you replaced the head gasket you pinched the o-rings on the intake tube or the pushrod tube o-rings are not seated properly or are cut from a misalignment. Any of these things could result in your problem. An air leak in the system could screw up the pressure differentials and cause the regulator to not be closing. Especially when the engine shuts down.

But lets take it to new thread, makes it easier to handle the responses and it doesn't have anything to do with the topic above.

Skid,

the both versions of the 63 have a special head/liner combo. The sleeve is part of the entire head assembly. So it can be a bit expensive to buy a new sleeve and lots of work as the the valves, and all need to be transfered over. The piston ring is an easy one....even a piston or the rod is easy but the sleeve or cylinder gets expensive its almost half the price of a new engine. So I would let YS Parts and Service do this work for you. I don't think it means your engine is scrap and buy a new one...but it could be a more pricey thing. As for the sod farm and the dirt field. The dirt is the problem one....even with an air filter. This will eat the heck out of a piston and sleeve.

If the sleeve is not scratched too bad....then a new ring can likely bring it back....I would send it in just to make sure its gone through well. Another issue with the dirt field is the bearings....they are likely in need of changing. If you run on a dirty field like you are doing the money for bearing will keep your motor alive believe me....If you have a bearing come apart it will shell out an engine and then it will be just a paper weight.... Again lets take this conversation to a new thread as well.

RE: How well did your YS run after sending it in for service?
 

Guys:
I think it's time to let this thread die.
Since I first started it I've learned a lot about YS engines, Troy and YS Performance.
The main things I've learned are:
1. YS engines are sophisticated and I would not recommend them for beginners unless you have someone very familiar with them to help teach you.
2. They are fantastic engines and I will not hesitate to purchase more of them (I have 4)
3. The real reason I started this thread was service concerns, not the engine. I have since come to have complete faith in Troy and Performance. I'm firmly convinced that most if not all problems after service have been novice users.

So,,,,Please just let this thread die, it no longer serves any purpose.

RE: How well did your YS run after sending it in for service?
 

Hi guys I sent a ys 63 in for repair. I had fuel problem than crashed the plane. The engine was repaired including a new crank. The engine ran so so. So I emailed Dave he recommend heli 30% fuel and I have never looked back. I love the engine. :)

Anyone know where Richard Verano is these days?