OS55HZ here :). Woot!!!

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Home › RC & Power › ✈️Aircraft › 🚁Helicopter › Engines Plugs Mufflers Fuel › OS55HZ here :). Woot!!!

09-17-2009 03:54 PM 11 years ago

0Post 41

w12martin

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Chengdu, Sichuan, China

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CoronaL, try with this store that has its web site also in English.
http://homepage1.nifty.com/ishiimok...hatori_heli.htm
http://homepage1.nifty.com/ishiimokei/english/index.htm

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09-17-2009 04:38 PM 11 years ago

0Post 42

montarok

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Brooklyn, NY

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yep got mine from HK. If it breaks I have no warranty. That said, good luck getting OS/hobbico to warranty a motor anyway, they are very good at finding ways to deny warranty work.

Guess it was my turn yesterday. I was shocked when OS/hobbico denied me warranty yesterday, they even wanted to keep my engine. My experience with them had been fair. I see this is a pattern with them now, I thought my situation was unique.------------------------------------
www.carifuna.com

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09-17-2009 06:09 PM 11 years ago

0Post 43

mingyaman

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kingston,NH

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Im another unhappy os owner after I was denied warranty.My 50 hyper was only two tanks old when it sh*t the bed.

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09-17-2009 06:52 PM 11 years ago

0Post 44

CoronaL

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Winnebago IL

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what happened that the motor's died?Randy!!! I am the liquor

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09-18-2009 01:21 PM 11 years ago

0Post 45

Swoop

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Newark, DE USA

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I had the same experience last year but they changed this summer. I'm guessing it is the crappy economy and trying to cut costs but now they will look for any reason they can to deny the warranty.

Nope, I think its a pattern
I agree, no problems a year ago with warrany, but just got denied warranty work this August on a 4 month old motor.Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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09-18-2009 02:15 PM 11 years ago

0Post 46

CoronaL

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Winnebago IL

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Nope, I think its a pattern
I agree, no problems a year ago with warrany, but just got denied warranty work this August on a 4 month old motor.

therefore if you want to buy OS buy it from HK, save some $ and if it taco's you have effectively the same(NONE) warranty you would buying within US. Until Hobbico/hobby services gets it's act together then why support their network and markups??????

Randy!!! I am the liquor

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09-18-2009 04:58 PM 11 years ago

0Post 47

bbaxter

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Central Illinois

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We have seen some posts where individuals have complained that we do not honor the O.S. warranty, or that we try every trick possible to not honor the warranty. That is nothing further from the truth! The O.S. warranty covers repair or replacement, at our option, of actual defects in parts and workmanship of the original manufacture of the engine for a period of two years from the date of original purchase. We honor that to the letter!

We do see, however, many engines come in that have damage to them from corrosion, overheating, impact damage, and so on. If we see an engine with those difficulties, we inspect them carefully to see what the actual cause may have been. However, please be aware that damage from an overheat not specifically caused by the way O.S. made the engine, or damage from corrosion are not really warranty issues.

Overheating is rarely a defect in the engine, but many engine owners do not believe that. They think that once an engine's set, they can forget it...or once they've been told a temperature by a buddy or online article, that's it...or they've been given a set number of turns and they'll be OK. Setting an engine is unique to every installation, and will change from day-to-day. It must be set for each day's demands. An overheat will result in scoring of the piston, ring, and liner, and will cause the cylinder head bolts to become loose once the engine's cooled.

Corrosion is a byproduct of using glow fuels, especially high nitro fuels. The fuel, itself, will absorb moisture from the air, and combustion products will work their way into the engine's lower end. Those combustion products include water, some gasses, and a small amount of acid...nitric and nitrous acids. These combustion products can encourage corrosion development on the steel parts of the engine. Corrosion can be prevented by aggressive use of after-run oils that will displace the fuel residues and coat the steel parts of the engine. You can use specially-bottled after-run oil, red-colored automatic transmission fluid (Dextron II or equivalent), air-tool oil, a good-quality coating machine tooling oil, non-graphite gun oil, and such. If the fuel has an oil package which contains at least 50% castor oil and the total oil in the fuel exceeds 18%, you may be able to get by without after-run oil for short periods of time. In this instance, you'll need the after-run oil to prevent gumming of the castor oil and to prevent corrosion.

At the end of the flying day, disconnect the fuel line from the carburetor and run the engine at idle with the glow plug ignitor battery connected until the engine quits. Then make several attempts to start it until it will no longer fire. It will then be dry of fuel. You will not damage your engine running it in tis manner. Remove the glow plug battery connector. Open the throttle to full and inject a teaspoon or two of after-run oil into the carburetor air intake and turn the engine over by hand while you rotate it into a variety of positions. You may need to remove an air cleaner or other intake device to make access easier. A long, flexible tube on your oil can/bottle can help.

O.S. does state that you should not put a petroleum-based oil through the carburetor, but that refers to flowing it through the fuel passages. If you inject it through the carburetor air intake, you will be just fine. If you have a diaphragm pump on the engine, disconnect the pump line so that the oil does not damage the pump diaphragm.

You want to make sure the oil gets to the bearings. A few drops are useless, because there just won't be enough oil to do a good job of coating the internal parts. You cannot add too much after-run oil. If you have difficulty starting the first time at your next flying session, you've done a good job of coating the engine's internals.

We don't warranty engines from those users who ignore recommendations and choose to not take protective mesaures with their expensive equipment. Steel bearings, piston rings, liners, and bearing races all need oil to prevent corrosion between usage. Remove air filters at the end of each days running and inject oil directly into the open carb air intake. Use a starter to turn the engine over rapidly and disperse the oil throughout all engine parts. Just be careful that, if your engine is side-mounted or inverted, that you do not cause a hydraulic lock in the cylinder by allowing too much oil to build up in the cylinder.

Some fuels state that they have anti-corrosion products in them so you won't need after-run oil. We've never seen successful implementations of that. We strongly recommend the use of after-run oils in EVERY glow engine at the end of the day's flying.

Bill Baxter, Manager
Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign, IL 61822
USA

Phone: 217 398-0007
Fax: 217 398-7721
Email: hobbyservices@hobbico.com
Web: http://www.bestrc.com

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09-18-2009 06:07 PM 11 years ago

0Post 48

Swoop

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Newark, DE USA

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Bill, your post is well written and does help explain some of the gray areas concerning both warranty issues and afterrun injection.

In the past I was hit or miss using afterrun, but with my newest engine I use it everytime. I'm hoping this is the key to keeping my engine running longer than 6 months.Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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09-18-2009 07:20 PM 11 years ago

0Post 49

CoronaL

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Winnebago IL

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I call BS on this post. A friend sent in a 91SZ pumped motor that CLEARLY wasn't overheated. The pump failed and it ran lean. Taco'd the liner/piston/head, pretty much the whole motor. The piston and head didn't show any tell tale signs of any appreciable lean running. No discoloration, and in fact looked quite like new other than the fact that an aligator might have knawed on it due to the chunks of metal floating throughout the motor. Part of the piston broke away when the pump failed. Shredded the motor. Again, the rest of the piston wasn't browned, nor was the head. Yet he/I were told he ran the motor lean by TUNE. Warranty denied and said the pump was working. Then they tell us on the phone that OS pumps are simple and they really don't have issues with them. YEAH RIGHT!!! Ok, well the pump may be simple, but the pumps ARE KNOWN to have issues. They wanted over $400 to fix the motor. Keep in mind he could have bought a new one for cheaper. Then it was a battle of "for customer satisfaction" we can do it for 1/2 price parts, plus w/e labor rate is. No thanks. Eventually when the CS rep ran out of excuses to the defense he/we put up stated the OBVIOUS, FINALLY they capitulated and fixed the motor very very very reluctantly.

I've also read of MANY people who have had lets say con rod failures, or other issues that were NOT corrosion, but denied due to some bearing corrosion outside the bearing itself OR the crank area. Almost any motor around our area will exhibit that sort of corrosion at least to small degree whether you put after run in it or not. And it would have NOTHING to do with the parts failure some people have experienced. AND my bearings last 10's of cases of fuel prior to needing to be changed I might add, if my helis are stored inside in my dry basement, which is nice and cool.

I will say there are people who don't know how to tune or operate a Nitro motor and wreck it thinking it should be warrantied, BUT I 100% believe Hobby Services is denying MANY legit(in my eyes) warranty issues. That goes for Futaba products as well.

While we are at it, the same friend who had that 91SZ pumped had to send in a Futaba servo that was DOA, he sent in the reciept from Heliproz and Hobbyservices told him his warranty was denied b/c the servo was bought on the black market and claimed he was trying to defraud them

Took a call I'm told(by my friend) from someone at heliproz to set Hobbyservices straight.

So While I appreciate you posting in this thread trying to defend the practice of Hobby services, and I do believe that YOU BELIEVE this to be the case. Hobby services still is FAST GAINING a bad rep for poor customer service and warranty denial. I don't see groups of people ganging up on Horizon/JR, Airtronics/Global Services, or YS/YS parts and service.

PS, I'm sitting on a bad Futaba BLS451 that I got at IRCHA, it locked up and caused a crash, and not the top of the case is busted as is the main gear. Also I have a bad BLS251 as well. I've procrastinated sending them in b/c I simply don't want to have to deal with the denial and consequent frustration of the process. While I prefer Futaba servos any future servos will be either JR or Align(no appreciable warranty but much cheaper), maybe InnoLab.Randy!!! I am the liquor

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09-18-2009 08:36 PM 11 years ago

0Post 50

Havoc

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Ky.

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I've had great luck with Hobby Services. Although with the pumped SZ you are money ahead to pay them to send it to the crusher and waited for the HZ. I think by discouraging you from pursuing the SZ, they were actually doing a great service.

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09-18-2009 08:55 PM 11 years ago

0Post 51

CoronaL

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Winnebago IL

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I agree, I wasn't a fan of the SZ motors, but since he paid about $430 or something like that for the motor new, from Heliproz, and it died within 20-30 flights, still breaking it in. I talked him into sending it in for warranty as it was a pump issue that caused the terminal lean run.Randy!!! I am the liquor

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09-18-2009 09:17 PM 11 years ago

0Post 52

CoronaL

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Winnebago IL

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I've had great luck with Hobby Services

Havoc
Not denying you had great luck, but I'm curious as to "when" that was you had great service. It seems from my recall of "complain" posts and my friends and my own experiences within the past 6-9 months there are ALOT more denials and problems with serviceRandy!!! I am the liquor

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09-18-2009 09:37 PM 11 years ago

0Post 53

montarok

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Brooklyn, NY

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CoronaL, you're very correct about the SZ pump. Although it is a simple pump, but the diaphragm does get stuck and the engine will run lean, this was actually discovered by a Futaba rep. OS is definitely unfairly denying customers warranty and this is just plain wrong. After denying you service, they still want you to pay for examining the engine that you believed to be under warranty at the time you sent it in, this is just plain sick.

BTW Bill, please list examples of what's covered by OS warranty.------------------------------------
www.carifuna.com

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09-18-2009 10:18 PM 11 years ago

0Post 54

Havoc

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Ky.

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When I had the pumped SZ I sent it back at least a few times. The only charge was when I asked for an extra pump and regulator. I never let mine burn up. As soon as it went lean I'd hit hold or after a while I realized you could jab the collective and knock it out of it's condition. But it was just a crap engine. There was nothing they could do for you with the warranty because they were stuck sending back a crap design. I haven't sent anything back in at least a year so you might be right about that. But I've heard complaints about them for years yet never had an issue. I make sure to send the receipt as well as a letter detailing the problem. But that engine is why I am no longer first in line for an OS engine.

this was actually discovered by a Futaba rep.

I don't doubt they knew about it first but it was first 'discovered' by irritated customers as far as any useful knowledge for other potential customers. The OS reps I discussed it with had me chase my tail. But since the SZ worked and the pumped SZ didn't then the pump was pretty obvious.

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09-18-2009 10:28 PM 11 years ago

0Post 55

CoronaL

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Winnebago IL

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thx for the reply Havoc

he unfortunately wasn't that framiliar with the motor or it's pecularities, and it was a ways away from him, as well as the heli was facing him(decreasing tone of motor) so he didn't hear it racing right off, and by the time he figured it out, it had terminal damage.

I was told point blank on the phone(I was trying to help him get it sorted out), that OS/Hobby Services wasn't having issues with the SZ pumps, and that it was "RARE" for them to see them as they were a reliable design. I about fainted when hearing that. After reading MANY horror stories about pump issues. Heck even the HZ pump is still having issues from what I read, although not as bad.

Wonder why OS is now moving to a pressurized setup?????? Think it might have to do with a crappy design in the first place????Randy!!! I am the liquor

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09-18-2009 10:43 PM 11 years ago

0Post 56

Havoc

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Ky.

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A friend of mine got a non-pumped HZ and it is relatively vibration free (compared to the SZ), works great, easy to tune. I only got to tune it and play with it a few times but I loved it. I doubt there is much need to waste the time on a pumped version.

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09-18-2009 10:52 PM 11 years ago

0Post 57

CoronaL

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Winnebago IL

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yeah I have 3 OS91HZ NON pumped myself. One in my Aurora, and one in a TREX700, and one sitting in a box new on the shelf. I also love my YS91's as well

my 91HZ is smooth and has good power. I "think" the 91SR has a wee bit more torque and is probably a bit better 3d motor, but frankly each is pretty darn close and I think it comes down to personal preference myself.

There are qualities I appreciate in each maker. Frankly, if I wouldn't have liked the HZ I would NEVER have considered the 55HZ as again prior to the experience with my 91HZ's I simply wasn't impressed with any of the OS offerings compared to their competition. Bearing issues, over priced, warranty issues, etc...

Since the HZ though I think the QC has improved AND the design has improved to where I believe bearing issues should be less of a concern, and power is good. OS's machining has generally been among the best so that's a plus too.Randy!!! I am the liquor

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09-18-2009 11:27 PM 11 years ago

0Post 58

ren

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Houston, TX

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We don't warranty engines from those users who ignore recommendations

Neither from the ones that do!!
I have my first experience with a os 70 the they that I was doing the break in Follow the manual my piston brooked right on the middle a big hole, I send it to service dep and they said that I run the engine to lean and it cause the failure.
After that a couple of problems with servos, then I just decide to satay with JR for electronics and very pleasant when spartan came out now with ys and tt improving their engines is a matter of time for them to realize that customer service is important when is a lot of competition on the market!

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09-19-2009 01:54 AM 11 years ago

0Post 59

rchelichop

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seeya

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Ditto on the SZ pumps failing. Mine and a few of my friends pumps went out. If you able to catch it in time, it was ok, but mine fried I was high up and didn't hear it till it popped.

The O.S. warranty covers repair or replacement, at our option,

Well, I think that was what the poster was talking about, taking the "at our option" too liberally. A lean run can be caused by a engine malfunctioning, its not just everytime operator error.

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09-19-2009 03:20 AM 11 years ago

0Post 60