I was impressed with the design of a tiny gas engine running rhe generator with the incorporated circuitry that not only provides external power (run lights or whatever you desire) but also charges the 3S Lithium battery. Keep in mind that this is a hobby and as such we tinker, modify or improve as we deem necessary. I had a minor issue with the fuel tank where the bottom of the fuel pickup was blocked by because the tank was attached to the base too tight. Easy fix. I also have two recommendations, I prefer the new version of the CDI vs. the old style and i didn't like the solid aluminum collet used to connect the engine to the generator. I will replace it with a vibration damping coupler. You can find the cheap, just Google. Aside from that I really like the product.

Although I am only about 1/3 finished, it has been a fun build with a company that takes pride in their design and accuracy. I hope to continue doing business with them.

Buyer beware.
Instructions provided require very careful consideration. Even the missing ones. Syntax means that some actions are discussed after their correct place in the sequence of assembly.
Also found missing fuel lines from the "Start" kit.
Spoiled the experience sadly.
DT

Great engine and built very well. I made gaskets for the block covers, don't know why it didn't have them. It fired right up out of the box and is pretty heavy for it's size. One of my favorite engines.

The assembly instructions are missing certain criteria. This includes correct torque requirements for critical engine components! I've assembled the block assembly up to installation of 6 of the eight pistons and find the assembled parts nearly frozen in place!

I have been waiting since February for this Toyan V8 Engine and it’s finally here. So excited to start the build. I have just gotten everything set up in the garage to start in the morning
I even went online this morning and ordered the platform as well as the turbo charger as well . Once I put this together and run it then I will change over to the turbo charger. I’m very excited to say!
The guys at Engine DIY HAVE NEVER LET ME DOWN. Thank you guys!

Great product, I enjoy building it .Worked well all parts were there, very recommend.Thank you .Looking forward to next product

Background: retired certified engineer with several design patents and decades engine experience.
The good: this is a great looking model the machining is top notch. The best looking hm out at this point. Everything beautiful made, great display.
Opportunity for improvement: Do not expect this to run well without significant tinkering based on my experience. This did not run at all out of the box, and has taken many hrs removing bugs to get it to stay running without randomly sputtering out.
-the piston ring needed replacing (spare included)
-the ignition timing was a good 30deg advanced, causing difficult running. It should be set at top dead center. This is not easy to achieve, given points design, it's a trial and error.
-the point spring rubs on the base of motor and the valve rod, wearing thru the rubber insulation causing intermittent shorting.
(I narrowed the spring to add clearance and added shrink tubing to insulate better.)
-the intake valve may stick causing loss compression. (I increased valve spring tension)
-the carburetor is extremely finicky and one has to quickly change settings at times to keep it running, esp during warmup.
-the recommended 25:1 gas oil mix may be too rich, upon pulling head I found way too much oil and carbon in there. I run 75:1 mix with non-ethanol gas and keep all oilers full for best results so far.

I have about 3hrs total run time and things seem to be breaking in better.
I bought additional ignition, plug, carb, head, ignition wiring, battery, during my attempt to diagnose the sputtering out, but found no smoking gun. (I've noted the fuel is pushed half an inch down the line from carb, so something is causing back pressure, maybe a sticky intake valve still)
I removed the high speed lever as I only run slow mode and the lever can contact the points wiring.

All in all, nice engine, not recommended unless one has motor experience if intending to run.

Needs improved adjustable ignition, more spare piston o rings, stiffer intake valve spring.

If your willing to tinker and have experience, recommended. Thank you

First off let me say that at this scale and price point. The detail, is UNREAL. Down to the steps on the side of the heli. The little pilots included are a very nice touch as well. Just like every other heli offered here, super easy to get your feet wet and build your confidence with a great looking helicopter that flies even better.
The one button inverted mode is also a SERIOUS head turner. It’s just as locked in upside down as right side up. If I could give more stars to this helicopter I definitely would.

This is what I received. Rad, gas tank but no water tank.

Looks great, works great with accessories, really showcases OKMO's rise to a very serious model engineering supplier. OKMO is no longer Microcosm from 8 years ago!

The detail and precision are excellent. It starts easily and runs ok. I do note one issue. There is excess vibration while coasting in between "hits". I can observe minor runout on the starter pulley but I don't think that would be enough for the vibration. I think it would run smoother if better balance could be achieved perhaps by a lighter connecting rod, or counterbalanced crankshaft or counterbalanced flywheel or some combination of these.

Even though this is an awesome build, there were a couple of items where it was not clear where it got installed. Also I have yet to be able to fire it up. There seems to be some kind of glitch with electronics

First of all I ordered a green car I received a yellow one and they put the hole for the antenna on the wrong side

Pics and video

I had previously built a 1/24 scale plastic static model of this automobile. When I learned that this all metal working model was available I immediately ordered it and was not disappointed. The workmanship and detail is incredible. The instructions and part layout are very good although watching a YouTube video of the build helped when the instructions were not absolutely clear. In summary, I am very pleased with the result and recommend it highly to any experienced model builder with an interest in historical auto models.

This is a really nice 5 cylinder radial engine kit with built in lights.
It’s the perfect kit for a new builder.
Easy to assemble, great instructions and the parts fit perfectly.
Surprising LED light effects inside the cylinders when activated.
Built in rechargeable battery.
One of my favorite easy-build DIY models!

Purchased for my almost 12 year old grandson. He was thrilled to get started and could not wait to complete the kit. He worked on it diligently to completion over several hour long sessions. Great kit. 👍

Exactly what I needed for my custom project. The levitation works very well and I’m really happy with the product. I also asked about purchasing additional floating units, and the customer support was quick and very helpful. Highly recommended!

As a paraplegic, I need things to keep me sharp, and keep good skills with my hands. The model was terrific! I worked on it and had it put together in just a few days. The quality was unbelievably great. It works just like the real thing. I can’t wait for another new one to roll out. I will be one of the first to order it.

The servo mount bolted onto the engine nicely, but I had to do a little filling on the inside to get the servo to fit. Otherwise very nice part.

Stand works great a must too run these engines and hold them firmly. If not putting them in anything rc related.

Works great almost ready too fire up.

Receive the starting accessories and was very happy with my purchase.
Everything looks good and I’m sure everything will work as it should.
Because of home projects I did not start yet but can’t wait.

Outstanding project. Was a fun assembly and looks great on display. I highly recommend it.