Can you help identify this engine..?..thank you..!

It's an Evra 190 sold by Hobby People.
It's a Ryobi 31cc made for RC use with some improvements over the stock weed-wacker engine. It came with the prop adapter, a different case with beam mounts, dual ring piston, a different carb and a special muffler and engine mount.

I have some Ryobi conversions and I have an Evra190 that I converted to electronic ignition and did some other work to it. The 190 ran fine stock and would be good for a warbird or a scale plane. You can get some good power from it with some modifications but compared to todays 30cc engines it's not as powerful in stock form.

I am not familiar myself with the Evra engine, it having been introduced before I got involved with gas engine R/C planes. It surely does look like a Ryobi engine.

But I'm curious, the weak point in a Ryobi is the stock connecting rod. Any rpms over 7500 and you are over-stressing the rod and courting disaster. Do you know if the rod was changed/improved on the Evra engines??

I have a Ryobi that I converted myself and hopped up, and it turns an 18 x 6 prop at 8500 rpms. Of course, I don't run it that fast as it wouldn't last long. I have often thought of making a new and stronger connecting rod for it, but STILL have not gotten around to it.....

Thanks,
AV8TOR

I don't think it was BUT I never had one let loose however I never propped them to run over 8K. There is a Ryobi 30cc out there too that would be a conversion engine that is a bit beefier than the 31cc and can push higher rpms after conversion......closer to 10K.  I never had a  Ryobi 30cc so I can't say for sure.

Ryobi!
Be careful, some Ryobi had a 7000 rpm electronic limiter in the flywheel ignition.
You can check that out by following the patent pending number on the ignition.

They are kinda low end engines....real weak con rod!!!!

I have seen a lot of newer Ryobi yard machines lately with 30cc Homelite engines instead of the original Ryobi design. I believe this is probably the engine you are referring to, because the Homelite engines will indeed turn 10,000 rpms without hurting themselves if everything is set up properly.

AV8TOR

That must be where they are coming from then. With the cost of the newer chicom 30cc engines and how well they perform it's not worth it to buy parts to convert these engines . Now if you have parts lying around, or have a machine shop with aluminum stock and time on your hands then that's a different story.

The Evra for sale above would be good for a 120 size cub, biplane, warbird to fly it scale. Just use it as a lugger.

The nice thing about the Chinese engines is you get the pleasure of replacing them every couple years! A flying buddy just had his DLE 55 break the top of the piston off at the ring groove!! Less than 1 gallon of fuel through it! He has flown gas for years with ZDZ and Zenoah engines with no problems. I am sure that the EVRA will still be running long after the Chinese engines have been remelted and resold, but it isn't nearly as trendy. As you may notice I am not a big fan of the clone engines.
Larry

I'm a big fan of conversion engines myself, for many reasons, quality being one of them.

The Ryobi is neat, because with it's rear exhaust and intake, it fits a narrow cowling like on a Mustang or a Tiger Moth biplane without having to butcher the cowl and have the unsightly muffler on the outside.

I have a Tiger Moth with a Ryobi, and cut the cowl only for cooling holes. Looks great and the Ryobi flies it just super.

AV8TOR

OK, who can ID this engine:

Rino 140 sold by Hobby People aka Hobby Shack

It's always possible to get a bad engine. I have 3 DLE 55's. Combined more than 200 flights. Of the dozen of more pilots in our club with DLE's none has experience an engine failure. From my experience, DLE is just a reliable as Zenoah, Quadra ( I have a 35 with serveral hundred flights).Again it is always possible to get a bad engine, but I would not condemn all DLE's on the basis of what happened to your friend.

Thank you, thank you ver' much.

Sincerely, Richard

Thanks a lot for identifying the Evra/Ryobi engine. It appears one must be aware of the weak conrod and eventually an rpm limiter...?!
Three questions for you all:
1) suitable fuel for general sport flying..?
2) where can I get an electronic ignition kit..?
3) if it is equipped with an rpm limiter should I keep it or disable it..?

..thanks for your input...!

Either regular pump gas and 2-stroke oil 40:1 or AV Gas and 2-stroke oil 40:1 is what I run.
You would have to buy or make a prop hub to replace the stock flywheel and almost any electronic ignition could be made to work
Here is a place that sells the parts
If you convert to EI then the rev limiter has been removed. If you want to keep it stock I doubt that engine has one (non of mine had them) but if it did it wouldn't make much difference as on an 18X8 prop it won't go much past 7K except when unloading in a dive.

What? Jag Engines? I thought they went out of business a long time ago?

AV8TOR

What size Tiger Moth do you have?

Thanks,

It's big. 76" wingspan. I have a picture with a park flyer Tiger Moth sitting behind one of the wing sets on the big Moth that looks really cool but I can't find the darn thing. Looks like Mamma Moth and her baby.

AV8TOR

Have you found the weight of the engine affects the flight characteristics in a negative way or causes structural issues with the light airframe?

Tx,
Mike

I've had no problems whatsoever with it, and it balanced with no extra tail weight needed. Of course I removed the heavy magneto ignition and used electronic ignition, which helped on the weight and balance issue. If you used a lighter engine on this plane, you would have to add ballast weight in the nose to get the c.g. right.

Additionally, I converted it to four ailerons instead of the original, (and scale), two aileron setup. Rolls and aileron response are very good now. It is the Tiger Moth sold by Nitro Planes. I don't know if they have any left. They are bailing out of gas planes on us, and investing all their money on those damn electric planes. It's a shame as I have several of their gas and/or glow airplanes and they were cheap, but well made in my opinion. The only bad part was sketchy instructions and some occasional problems with support. However, I would buy more planes from them if they would just stock them and keep the great prices.

AV8TOR

Nitro Planes bailed out just at the wrong time. A lot of smaller & lite weight gas engines came out on the market. If only they would have kept on selling them. I sure did like my Giles 202 with a 30cc DLE engine on it. Heck a 20cc engine would have flown it and a lol of other Nito Planes they did have for sale. What a crying shame. Capt,n

Yeah, I am bummed about it and have written them a few times. Maybe if we all write them they will get the idea....

I've got four or five of their models flying right now.

AV8TOR