Are these well running engines? All I've had is the TPS and it ran great. What about the other ones? Do the engines come with glow plugs?

I had an evolution 46 that came in a trainer. good motor had gobs of power. it had alot of unessaceary stuff on it but a solid motor.I think the regular 46 does not have all the extra stuff on it.like fly wheel and limiting collars and stuff. If i where loking for a 60-75 motor look at the Gms / Tower motors they are nice motors. but for overall no hassel fuss long life and less frustrations get any size of OS in any type of stroke. saito makes a good moter as well .same quality as OS but a bit lighter. I woild not hesitate to get a evolution again. but i am going to move most of my stuff to 4 strokes. I am going to try Magnums next time maybe in a H9 pulse or a high wing plane with flaps. Heck, most of these motors are good everyone is going to have a bad egg every once in awhile. evo's have a good warrenty so does Os as well as Saito and magnums. take your pick don't let every onehere try to scare you into buying the most expensive motor. the best thing is to see what most folks in your area is running that way if you have trouble they can more easily help you. I really like the 75 GMS or Tower motor and if I ever get a plane that size and want a two stroke that is what I will get. Great bang for the buck and runs good too.

I have an Evo .46 and an OS .65LA and I have used an OS 1.20.

Both brands are great, but I would never use a Super Tigre again. Too many issues with even getting the engine to run. OS and Evo, flip it and go. I pulled an OS .46 LA at work, hadn't been run for two years, took a little longer to start, but she still started just fine.

I am a fan of either maker, I would for sure buy from them again.

I've had several Evolutions.

Most have run well once the limiters were removed.

Avoid the 1.00NX, historically it's been problematic around here.

The PTS and .46 have been fairly good.

What limiters? And how are they removed?

l have a 46 - is one of the best engines l've had - starts very well, lots of power, quiet, was VERY affordable.
After a year can still start it virtually every time without starter motor - prime it, put on glow, couple of flips with stick and away it goes.

As advertised - rec'd the engine, mounted it onto the plane, went to the flying field, started it up and took off!!!!!!! and havent looked back since.
Several club members have had the same experiences.
Out of the BOX and into the SKY!!!!

any new engines in the future will be Evolution for sure.

I bought the larger 61 size and have not been very impressed!! I ended up buying a carb for a Tower Hobbies 61/75 to finally get it to run properly and it has only moderate power output. I won't be buying another one. The story is that the engines are broke in and adjusted at the factory. I think that this is a bunch of hooey considering that some of the engines the low speed needle valves come out of the box completly closed!! Also based on my engine, it needs several tanks run through it to begin to smooth out, just like any other engine that needs to be broke in!!! I should have just bought another TH 75 engine that runs great, is easy to adjust, has better power output and is less $$$!!! [>:]

The "limiters" are the blue collars around the high and low speed needles.

They are there ostensibly to prevent newbies from "mis-tuning" the engine...

However what tends to happen is that the limiters PREVENT you from PROPERLY tuning the engine.

Typically the correct setting for the engine is just beyond what the limiter permits you to set...

Then the low speed needle tends to "walk" as you advance or retard the throttle, this throws the engine tuning off while the plane is in the air...

While all of this can usually be fixed, it's a lot of needless aggrevation.


That said we had one guy out at the field with a brand new PulseXT PNP that had the Evolution .46 in it.

I started the engine on the first try, after setting the limiters to their mid range.

I had him run a tank through the engine. It idled VERY well at a very slow speed, so I tuned it and let him fly it...

Not too bad... for an "out of the box" experience.


My experience with the 1.00NX have been less than good though...

As Fastsky said, I'll put in a TH or GMS engine instead...

They require a few tanks to break in, and just a bit more work, but they do not have these problems... and are less expensive.

I have 3 trainer engines 2 evo nt 46 and 1 nx evo 52 all good motors os engine is also good only problem i ever had was with the 52 needed to be broke in better
one thing that happen to me one time was flying the twist carb came out while inverted 50 feet up [X(] (my error i should go over my planes) fliped over landed
bolted back together and flew ....very low mantance if any mantance .

hope this helps .. also like how the glow plug angles back ( safety) i wish os engines did this also

I had a 1.00NX as my first and last engine. It took a loooong time to break in. Many deadstick landings because of overheating...even while running on the rich side. The H9 superplug was a POS...way too cold for this engine. Switched to OS F plug and then it could hold an idle for more than 10 seconds. From that point on it was a lot of running the crap out of it to break in. Of coarse, as you mention, the limiters had to be removed. Then, after hours of run time and multiple jugs of fuel...I finaly got it to the point where it seemed broken in and reliable. Then the carb fell apart. ....I chunked the whole thing and got an O.S....no problems since.

hhmm...i have used super tigers for many years and never had a problem with them. i have four st 45's and they all run great. but , they are not as good as they used to be. years ago when they were manufactured in italy they were top of the line. but when great planes became the sole importer for the them they started being manufactured in china and the quality dropped somewhat on them. but i still use them. once the needles are dialed in they run great. when their new out of the box for break-in you must reset the low speed needle. all st's i've owned you have to change the factory set low speed needle setting or they will not idle at all.

Thanks for the heads up on the super tigers...but I was refering to my Evolution engine....the subject of this thread. Can't really compare evos to tigers can we, or are the made by the same people?? I wouldn't mind trying a super tiger in the future but I'm done with evolution engines. Kinda left a bad taste in my mouth after all that hassle.

I to had a early 1.00NX. Nothing but trouble. Finally sent it back. That helped, but still had problems. Finally changed plug to a os type "f" and the engine now runs good. Would I buy another? NO. Just My opine. Can't beat tower, price, power, reliability, service.
john

my reply about st's was to octane link......several people in our flying group had those evo engines and they seemed to be troublesome. one guy bought a hanger 9 rtf plane and had so much trouble with evo engine he finally replaced with another brand. another guy had one inverted on a arf and it would not hold a needle at all. it ran fair upright but inverted...forget it!

TO BE PERFECTLY FAIR>>>> I'm not bashing all evo engines...just the one I had an experience with and it looks like I have the backing of some others on this thread. I guess I was so disheartend by all the trouble I had because all the advertising promoting the Evolution 1.00NX .....said it was ready to fly ready to use right out of the box. Broken in at the factory and all carb adjustments preset...the buyer wouldn't have to do a thing except fuel it up and flip the prop. Nothing could have been further from the truth. It was all BS! I had ten times the trouble tuning it and keeping it going than any other brand of two stroke I've ever owned - about 40 of them. The only other brand I would say is troublesome would be the ASP brand, but I bought that one used...previous owner might have abused it...who knows...giving that one benefit of doubt.

Yup you mirror my experience with the 1.00NX.

I can get even the occasionally problematic PTS and .46 to run just fine after a bit of TLC, but the 1.00NX has been horrid.

the early mds's were the same . years ago a buddy of mine bought 3 of them from a hobby shop going out of buisness. he spent more time tuning them and trying to keep them running than he did flying. i do not know how the newer ones are now. but i would not own either one ....evo or mds.

I have 3 46"s and 1 .61 Evolution. All basically trublefree. I have had the HS needle virbrate when the "clicker" got a little slack. Re-bent the clicker and pushed a pc. of gasline over the needle and "clicker". No more problems. I did remove the limiter on the HS needle. Just a little pin. I pulled them out with needle nose pliers. Never have to mess with
the low end after initial adjustments. Tweak the HS on occasion as temp and humidity changes. All run great.

I guess they are run in, but these have chrome liners and you don't completely break those kinds of engines in with just a few flights. The ones I've seen also have a fair amount of pinch too.

I have a .455 and a .46NT myself, and both are great little engines. The .61 and 1.00 engines did ship with o rings missing in the carbs for a spell, but that is easy to fix. From what I've seen on those 4 models I mentioned, they all need a hotter plug than the OS 8. The OS A3 does wonders with them. The .455 and .46 responds well to the Towers muffler too.

First thing I would do with those engines is to take out the OS 8, prop it right, and then see how it performed.

If they knew that the o ring was missing, I sure wish that they would have said something. I called off and on for over a quater of a year. All they kept saying was send it in. They could have said "we will send you a o ring"! They also said that I was the only one haveing these kind of problems with thw 1.00. We know now that was bull

I have tried several plugs. For Me type "f" is only one that works all the time.

john

Ditto on the F plug. I tried several and the F plug was the only plug that actually kept the engine from cutting off at idle. I still have my little evo1.00nx in the closet...was on my desk earlier this year as a paper weight over accounts payable stack. I'll check on O ring when I get a chance. If it was missing, it sure didn't help matters any. That would explain the overheating seizures if it was drawing more air than needed and running lean.

I have no idea who knew what, etc. You have to remember that the support guys aren't mind readers. And, they get a variety of calls from the inexperienced to very experienced. Production line problems crop up in most engine manufacturers at one time or another.

The Saito SS plug is also good for the Evolutions. But, I prefer hotter plugs because my engines like them better.

Since someone else mentioned other brands I have 2 of the latest versions of ASP called the Super series in the 52 size. Fantastic engine in the "next" size up from the 46. Scary power with higher power than my OS 61FX! Regarding Super Tiger, they are anything but super. Difficult to keep running in the air and the throttle bodies tend to suddenly jam!!! Re: MDS, the ones that showed up at our field were soon tossed away after a few hours of fiddling!! [8D]

my super tiger 45's run fine. i have four of them. they hardly ever quit running in the air. i guess i get only the good ones.

I have an Evo .36 and it vibrates so badly that I will be removing it and replacing it. Yes, I balanced the props! Also the muffler leaks fuel around the seams like crazy. On the other hand a buddy has an Evo .46 that runs well although it also leaks fuel all over the place.