RETROL × OKMO 185-Type Gas Powered Antique Tractor Engine Model 4-Stroke European-Style Miniature EngineRETROL OKMO 185 Type Gas Powered Antique Tractor Engine Model 4 Stroke European Style Miniature Engine Early Bird Offer: Limited Time Collectors Price Black Friday Early Sales: Save $200 after sold out, it won't be available anymore. Own a working piece of history at the best price it will ever be. The 185 Gas Engine Model: A Collector's Piece That Lives on for Generations "When I was a kid, I would often wait for my father to finish working in the

RETROL × OKMO 185-Type Gas Powered Antique Tractor Engine Model 4-Stroke European-Style Miniature Engine

Early Bird Offer: Limited-Time Collector’s Price

• Black Friday Early Sales: Save $200 after sold out, it won't be available anymore.
⚙️ Own a working piece of history — at the best price it will ever be.

The 185 Gas Engine Model: A Collector's Piece That Lives on for Generations

"When I was a kid, I would often wait for my father to finish working in the fields. The tractor he used back then was this very one."

This is the story behind our 185 engine model. It’s more than just a machine—it's a memory of a time when hard work and family were intertwined with the land. Today, we've recreated it as a fully functional metal model—not just to relive those days, but to offer mechanical enthusiasts and collectors a piece of industrial history that’s built to last. This isn’t just something to display—it’s something you can use.

The History Behind the Engine: A Classic Agricultural Icon from Italy

The 185F Diesel Engine traces its roots back to the 1950s in Italy, originally designed to replace traditional animal-drawn carts and improve farming efficiency. Powered by a British-made single-cylinder diesel engine, it incorporated many parts from WWII military vehicles, marking a significant step in Europe’s agricultural mechanization. This engine played a key role in the evolution of modern farming machinery and has continued to power various agricultural and industrial applications for decades.

After being introduced to China and locally modified, it evolved into the 185F Diesel Engine. For decades, it has quietly powered farming, irrigation pumps, factory machinery—and more. It's been a reliable companion that has “run for decades.”

Why Create This Model? Because It’s More Than Just History, It’s Meaningful.

We've created many desktop engine models in the past—engines that move and show off but "don't last long." So we asked ourselves: Could we create a model that doesn't just move, but keeps going for years?

That’s how the 185 project was born. It’s not just a display piece—it’s a machine designed to run, built to perform.

Engineered for Serious Enthusiasts. Designed for Real-World Integration.

1. Designed to Fit, Ready for Work

This engine is pre-assembled and ready to be mounted onto your tractor chassis or mechanical rig. Simply secure it using four M2.5 screws, and the clutch housing is tightly fixed with eight M1.6 screws for solid alignment.

Whether you're powering a water pump, running a CNC machine, charging a battery, or exploring mechanical motion, this fully assembled engine is designed to adapt and deliver real output through its flywheel-side pulley or generator module.

2. All-Metal, CNC Precision

Every component is crafted using high-precision CNC machining, ensuring tighter tolerances, smoother motion, and longer service life. You’ll feel the difference in every rotation—this isn’t just a display piece; it’s built to run.

3. Durable Performance, Smooth Operation

This engine is designed for long-lasting use. The cooling flywheel helps keep the engine cool while it runs, and the lubrication system keeps the piston and camshaft smooth and well-oiled. The piston has two compression rings and one oil ring to reduce leaks and wear, ensuring it runs smoothly for longer periods, whether you're testing it out or using it in a project.

4. Smooth Ignition, Clean Running

This engine is equipped with a CDI (Capacitor Discharge Ignition) system, replacing the older Hall-effect sensor. With fixed ignition timing, you get a consistent spark every time, ensuring reliable performance from start to finish. You’ll still hear that satisfying mechanical click, but now with smooth, trouble-free operation and no digital delays—just pure mechanical reliability.

To keep the engine running at its best, we’ve added a dual-layer oil filtration system. It catches any dirt or debris before they can get into the engine, helping protect the internal parts, reduce wear, and extend the time between maintenance. This engine is built to deliver real mechanical performance, providing an authentic experience that lasts.

5. Thoughtful Craftsmanship in Every Detail

The fuel tank is made from real brass with a built-in fuel level window so you can monitor levels at a glance. Reinforced copper fuel lines are fiber-welded for corrosion resistance and long-term durability. Every part is designed not just to look good—but to function with purpose.

This isn’t just a “set it up for display” model. It’s a working machine that you can start up, drive equipment with, maintain, and keep running year after year.

6. Efficient Cooling for Long-Lasting Performance

This engine features a high-efficiency centrifugal flywheel that helps keep things cool. It quickly removes heat to prevent the engine from overheating, allowing you to run it for longer periods without losing performance. Whether you're using it for a few hours or pushing it to its limits, the engine stays cool and performs at its best.

7. Unique, One-of-a-Kind Engine Identification

Each engine is assigned a unique serial number, making it a one-of-a-kind piece in the world. This exclusive identification ensures that your engine is truly unique, adding a special touch to its authenticity and making it a collectible item. Whether you’re an enthusiast, collector, or hobbyist, this unique serial number guarantees that your engine is part of an exclusive, limited series.

Why Should You Own a 185 Model?

If you’re passionate about real mechanics, not just showpieces.
If you’re tired of models that only run for a few seconds.
If you want a model that could last you for decades, becoming a true part of your collection.
If you remember watching your father use this kind of machine or want to give him a special gift.

Then this 185 model is made for you. If you’re no longer satisfied with just “something that moves,” it’s time to level up your collection.

The Perfect Gift For

Father’s Day: A gift that brings back memories of working the fields.
Yourself: Because you love mechanical precision and quality.
Mechanical enthusiasts: People who appreciate the art of repair, the hum of an engine, and the satisfaction of keeping things running.

One Last Thing:

This isn’t just a model; it’s a deeper connection between you and the machinery that powers the world.

Why We Started with the Engine Version?

Originally, we had planned to release a full tractor version, but after seeing the production costs, we realized it would be nearly double the price of the engine model. This led us to temporarily pause the tractor release to make sure we could offer something more accessible and affordable for our customers.

We also considered releasing a kit version for those who love the challenge of assembly. However, after testing, we found that assembling the tractor took our engineers over 6 hours. We wanted to create something enjoyable to build, so we decided to focus on the engine version first, which will provide a smoother experience for enthusiasts.

Two Versions to Suit Different Needs

We’ve designed two versions of the 185 gas powered Engine model, each with its unique features to cater to different enthusiasts:

Generator Version — Light Up a Lamp, Ignite the Soul of Mechanics

This version includes a miniature generator system, which powers an LED light when started. It’s a fun, interactive way to experience mechanical power in action, perfect for gift-giving or newcomers who want a taste of how this engine works.

Plug and play: No modifications needed, just start and go!

Recommended for: Beginners, collectors who love interactive displays, or anyone excited about turning an engine into a power source.

Pulley Version — The Heart of Mechanical Power

Equipped with a metal pulley system, this version can drive external devices like pumps, CNC machines, fans, or any other mechanical contraption you choose. It’s the purest way to output mechanical power, offering you the freedom to expand and build on this model.

Perfect for DIY projects and adding more machinery.

Recommended for: Advanced mechanical enthusiasts, and those who want to integrate this engine into their own systems.

Specifications:

.Model: 185
.Material: Brass + Aluminum Alloy + Stainless Steel
.Color: Silver
.Form: Ready to Run
.Displacement: 3.6 cc
.Cylinder Diameter: 16 mm
.Stroke: 19 mm
.Cooling Method: Air Cooling
.Lubrication Method: Independent Oil Channel Lubrication
.Starting Method: Hand Pull/Electric Drill
.Ignition Method: Mechanical Ignition
.Spark Plug Specification: 3/16-40 British Thread
.Fuel: 95# and above Gasoline
.Engine Oil: 2T/4T Mixed Engine Oil
.Power Supply: 4.5V/AA Battery * 3 (not included)
.Product Weight: 1826g
.Package Weight: 2000g
.Product Dimensions: 20 x 12 x 18.5cm
.Package Dimensions: 25 x 18 x 20cm
.Packing: Graphic Carton
.Ages: 16+

❓ FAQ – Frequently Asked Questions

1. Is this a real working engine or just a model?
Yes, it’s a fully functional internal combustion engine. It runs on gasoline mixed with oil, uses real spark ignition, and outputs mechanical power via the pulley or generator module.

2. Why does the real engine use diesel, but this one uses gasoline?
Real 185 engines were diesel-powered. But mini diesel engines are very hard to build because they need extreme compression, strong parts, and complex fuel systems. That’s why most model engines use gasoline—it’s easier to start, more forgiving, and still gives you a realistic mechanical experience. We kept the original look and motion, just made it more practical.

3. What do I need to run the engine?
To get this engine up and running, you'll need to prepare the following:

Fuel: 95# or higher unleaded gasoline

Engine oil: 2-stroke or 4-stroke engine oil, mixed with gasoline (for lubrication)

Ignition power: 3 x AA batteries (not included) to power the ignition module

Starter: You can start the engine using a hand puller or an electric drill with a soft socket adapter

Basic tools: A small screwdriver set and hex keys for minor adjustments and maintenance

Optional but helpful:

A fuel bottle for easier refueling

A tachometer if you want to measure RPM

A mounting base or platform for stable operation

Once assembled and fueled, you're ready to fire it up and enjoy the mechanical motion!

4. Can it generate electricity or drive mechanical parts?
Yes! The engine comes with a pulley output and an optional generator module in bundle. You can use it to power small loads, fans, pumps, or mechanical displays.

5. Is this engine pre-assembled or do I need to build it?
The 185 engine comes fully assembled and tested, ready to run out of the box. You only need to connect the ignition module, fuel tank, and starter.