I would go with the Tower 75 or Super Tiger 90 both at around $100. The OS line of engines are very user friendly but the price is just too high for what you get and the liners will eventually let you down if you fly a lot. The Tower 75 is a powerhouse for the price, about as much power as a 90 and a very well made engine.

FastSky,
Please post some photos of these stuck Super Tigres if you would. I have many Super Tigres and they are great. The engine out, dead stick issue in Super Tigres is usually due to the low end out of position, too much nitro in the fuel, too lean, or wrong glow plug. I usually put an OS #8 plug in, run Wildcat 10% Notro with 16% Castor, and run the engine just a tad on the rich side. As far as the barrel sticking, this may be from Gumming Up of the carb barrel from whatever fuel you are using, or there may be a burr or nick in the barrel slot. A little pollishing may resolve this issue. I have a Super Tiger 90 2 stroke in my 1/6th scale Pica Waco YMF5 that weighs 11 pounds. That engine can pull that gal through any maneuver I put her through with power to spare. Good luck to you.

The "or there may be a burr or nick in the barrel slot" < this is the problem! Some that I have seen haven't looked that bad but still caused the barrel to jam. Others that I have seen are so bad it looks like the slot was ploughed out making a high ridge along both outside edges the length of the slot. I am not sure how these barrels worked at all without jamming immediatly! As I stated before I can't get any pics right now because I don't own any of these engines myself and never will. I only brought the issue up to point out that to me, there are more user friendly motors available in the same price range. [8D]

Hmmm...

Aren't O.S. Engines manufactured in China as well?

My SuperTigres run just fine, as do my O.S.'s...

The OS is far easier to break in and get going though. Once the SuperTigre is tuned up, there is nothing wrong with it IMHO.

Now back to the GRIEF with the Evolution engines and their horrid limiters, and that's another matter.

> " GRIEF with the Evolution engines"< Now don't get me started on them!! I just bought a TH 75 carb to try in my Evo 61 engine. ITs a last chance for the engine before I toss it in the river! It has really good power when it runs like its supposed to but it won't stay consistant. It doesn't help when you can see that both the neeedle valves are moving by themselves every time you throttle up! [>:]

You're not kidding...

My 1.00NX flies just GREAT, ONCE a day. For that one flight it's fantastic.


Thereafter it deadsticks, stall outs, etc. w/ NO change in the needle settings.

Even Locktite hasn't cured this. I've also tried the spring fix.


Anyone know of what other carb will fit this engine?

What about Evolution's .61 NT cos I have been using .45 Evolution PTS, its chinese engine and pulls a plane great with 10x6 prop. I didnt get complaints from it.

SPECIFICATIONS:

Engine Type: 2-Stroke
Displacement: 0.608 cu. in.
Cylinders: 1

General Specs:
- 1 cylinder
- Displacement: 0.608 cubic inches
- Bore: 0.944 (in.)
- Stroke In: 0.862 (in.)
- Shaft: 5/16X24
- Low RPM: 2000
- High RPM: 12000
- Weight (no muffler): 25.13 oz.


Applications:
- Pattern/Aerobatics
- Scale
- Standard Airplane
- Sport


Street Price:
$119.00


Mody

FastSky,
I believe your Super Tigre problem is an easy fix, or send it in with a letter of explanation. You'll probably receive a new one.

I had the same problem Fastsky describes right from the beginning with a ST G-45. I tried honing the barrel with emery cloth with only limited success. I think if I had a solid throttle pushrod or a nyrod instead of a cable, it would have been OK. Otherwise, I liked the engine. It was just starting to get nicely broken in when I pulled back rather than forward in a low level inverted pass. The carb's in a few pieces now.

-Scott

Hi jagnweiner, the carb barrel is a very small part of the problem. The bigger problem is in the round part that turns in the barrel and opens or closes the air gap at the top of the carb barrel. Its called a carb rotor and the problem is where the angled groove is made in the rotor. It has to be smooth on both sides and getting it smooth has alsways required a fine tooth file. The metel is tough and emery cloth won't do much of anything. I finally found a pic of it you can see what I am talking about. [8D]

Nope. Still got "Made in Japan" on them. Part of the casting process. Think it says Made in Japan in the manuals too.

Fastsky-

When I said "barrel", that's the part I was referring to. Like I sad, the point is moot after the crash. The crankcase is broken beyond repair. I will say the ST was running well enough to reach impact at a high rate of speed. I had to dig it about 6" out of the ground.

-Scott

A minor but perhaps salient point darok. If you re-examine, you'll discover that contemporary O.S. Engines (eg: LA , AX) in fact no longer bear the phrase "Made in Japan" on their crankcase (eg: FX). It has since been replaced instead by the single word "Japan". Now there's enough room for the phrase to still be put there, so why? Mere innocent restyling ...or of another significance? ie: Implied O.S. Engines of Japan (Co) much liike JR (Japanese Radio) & Futaba though they're largely manufactured elsewhere. Not sure about the manuals without cross-checking (can't be bothred right now).

I can report a hearsay reliably stronger than either conjecture or rumour stating with certainty that O.S. are now manufacturing product in China, but can't provide anything which might prove it. Regardless, I have a Nikon camera manufactured in PRC fitted with a Japanese made Nikon lens which is indistinguishable otherwise in every respect from the original Made in Japan previous model. If the technical knowedge, machinery, manufacturing & quality control are replicated, why not?

G'day Mate,
It makes no difference WHERE they are made, after all some Harley parts come from all over the world, not just USA, but they have good quality control, the problem with ST is that the inside of em is not as good as the Italian made ones, design wise, they have changed em slightly. And not for the better.

My 2 cents...
Briefly....
O.S. Engines are high quality and a .61 would be fine for your Cessna.
Pitts muffler isn't really good for that particular model because of how it's designed.
Super Tigres, in My experience, are great engines for a very reasonable price. Their Mufflers are big, ugly, leaky and do sometimes rattle apart. But I've had great success with the new chinese tigres overall.
If money is not an option, get an O.S. but either one is decent, with good service and parts support.

Re: "Harley parts come from all over the world, not just USA, but they have good quality control, "< if you say so....

G'day Mate,
Yes I do say so, about the Harley parts, some are even made here in AUS, it mentions that fact in "The Enthusiast" magazine, which is a Harley Davidson publication for Harley owners, of which is am one!

I have (had) the same problems with my ST 45:

Baffle in the muffler came loose and left a rattling noise. Opened the muffler and several washers came out! What a crap! ST-support stated noise is caused by the rapidly expanding hot exhaust gas when it enters the muffler!!! What a BS!

Throttle barrel jammed in flight(!) due to a rough surface of the throttle barrel. Run the engine at full throttle until end of tank and glided the plane in. What a surprise to discover the reason after deinstalling the carb.

Muffler comes loose. Corresponded with ST support and they told me not to use the gasket. Why then do they deliver the part?
Besides, the muffler is way to big for .40 size planes.

Only plus on the ST: Starts reliable, powerful, economic pricing.


TAKE AN O.S. engine!!!!

Yeah, that's exactly what happened to my ST 45. Right there on the slot in the barrel. Jammed during flight, no kiddin'!

I have the ST 75. I had two mufflers go on me, same thing, inside baffle came loose and it rattled like a bell. I took the thing off and finally put a tuned pipe on it. So far, so good. The carb leaks fuel out the needle valve.

I prefer OS. I have 2 46's, one 50, one 61, one 90, and three 1.20's. All are just fine start right up and run good with great power. NO fuel leaks and no muffler rattles.

DS.