RETROL & OKMO D Type Sationary Engine Model Miniature Internal Combustion Engine

RETROL & OKMO D Type Sationary Engine Model Miniature Internal Combustion EnginePre Sale Information The product pre sale is on now. buy it from Jan 30 to Feb 6, save auto 150$ OFF. 449. 99$USD Only buy it from Feb 7 to March 15, save auto 100$ OFF. 499. 99$USD Only buy it after March 15, save auto 59. 99$ OFF. 540$USD Only Production quantity is limited. stock notices: now it has only 45 seats left. hurry up ( update on 9: 35 am jan 31 2026) Why Should I Buy from Stirlingkit Stirlingkit Exclusive 100th Anniversary Bonus1. 3

Pre-Sale Information

The product pre-sale is on now.

buy it from Jan 30 to Feb 6, save auto 150$ OFF. 449.99$USD Only

buy it from Feb 7 to March 15, save auto 100$ OFF. 499.99$USD Only

buy it after March 15, save auto 59.99$ OFF.540$USD Only

Production quantity is limited. stock notices: now it has only 45 seats left. hurry up ( update on 9:35 am jan 31 2026)

Why Should I Buy from Stirlingkit

🎖 Stirlingkit Exclusive – 100th Anniversary Bonus
1. 3 special gifts: 

The first 50 customers will receive a spark plug & Centennial Solid Brass Commemorative Medal & 100th Anniversary decals  made exclusively for Stirlingkit customers.

2. Faster Shipping.

All of Your order will be sent faster. And Stirlingkit team will keep you updating the details of production, shipping daily.

3. Special Offer for future replacement parts

First 50 Buyers can enjoy to 15% OFF for the accessories parts in the future. 

why only produce 100pcs this time?

Please note that our products are produced in a limited batch of only 100 units for this 100th anniversary event. What needs to be emphasized is that engine production is far different from ordinary product manufacturing—it relies on multiple sophisticated and complex production lines with extremely strict production standards and processes. For this exclusive anniversary batch, the raw materials we prepared are only sufficient for 100 units of production. Though we actually produce a small quantity more than 100 units in the manufacturing process, every single unit has to go through rigorous quality testing afterwards. Inevitable material scrappage and unqualified products from the testing lead to our final available stock being exactly 100 units.

Once this limited batch is sold out, a re-stock will require waiting another 60 days for a brand-new production run, and the engine production cycle is quite long due to its complicated manufacturing requirements. This limited 100-unit production is also a special tribute to our precious 100th anniversary celebration. We hope for your understanding and highly recommend placing your order early to secure your stock before it's gone!

Happy 100th Anniversary!

Gasoline Stationary Engine – 1926 Classic Design

100th Anniversary Mechanical Model

In 1926, a single-cylinder stationary engine design emerged that would shape the way farms and small workshops generated mechanical power for decades. Built around a philosophy of simplicity, low-speed operation, and long-term durability, this category of engines became widely used for pumps, generators, and early industrial equipment across the world.

To commemorate the 100-year legacy of this classic stationary engine architecture, this gasoline-powered mechanical model faithfully recreates the original layout and operating principles. It allows modern enthusiasts to observe, operate, and understand a working example of early internal combustion engineering.

This is not a toy.
It is a functional mechanical teaching model and collector’s piece, created for those who value real engineering history and hands-on mechanical design.

One hundred years ago, this kind of stationary engine quietly entered farms and workshops—not to be admired, but to be relied on.

For some people, engines like this are something discovered later through books, restorations, or collections. For others, they were simply part of daily work—started early in the morning, listened to throughout the day, and maintained because real jobs depended on them.

If you are among those who recognize the rhythm of a slow-turning flywheel and the clarity of exposed mechanics, this 100th anniversary model will feel immediately familiar. It does not try to modernize what never needed improvement. It preserves a way of thinking about machinery that valued understanding, reliability, and trust.

Today, most machines hide their workings behind covers and electronics. This one does the opposite. It invites you to see everything, to hear everything, and to reconnect with a mechanical language you may not have spoken in years—but never truly forgot.

On the 100th anniversary of this classic stationary engine design, this is not just a model to display. It is a rare opportunity to start it again, let it settle into its rhythm, and spend a moment with a kind of engineering that once powered real work—and real lives.

Design Characteristics

The original stationary engines from this period earned their reputation through real-world service. Their defining characteristics included:

• Simple yet robust mechanical construction

• Low-speed, high-torque four-stroke operation

• Exceptional durability and extended service life

• Widespread use in agriculture and light industry

These principles are preserved in this commemorative model, making the mechanical logic of early stationary engines easy to understand through direct observation.

Features

Fully Functional Four-Stroke Operation

The engine is delivered pre-assembled and ready to run, featuring a mechanical ignition system. It supports both manual starting and electric drill starting, allowing the complete four-stroke cycle to be observed within minutes. A solid wooden base ensures stable operation during runtime.

All-Metal Construction with Period-Inspired Finish

Precision-machined metal components provide authentic mechanical weight and tactile feedback. The period-inspired green surface finish reflects early industrial aesthetics while helping maintain long-term visual condition.

Display-Grade Mechanical Collectible

Designed for both operation and static display, the exposed mechanical structure makes this engine a natural focal point in workshops, studies, offices, or display cabinets. It appeals to collectors of engines, models, and industrial history alike.

Educational Demonstration Value

The visible motion of the piston, crankshaft, flywheel, and ignition components provides a clear and intuitive demonstration of early internal combustion engine principles, making the model suitable for educational, training, and demonstration use.

Historical Background

The original engine design that inspired this model entered production in 1926 and remained in use until 1964, with total production exceeding 250,000 units. Over its lifetime, the design underwent multiple refinements, including changes to fuel tank layout, mechanical ignition systems, flywheel configuration, and exhaust routing. The adoption of a 16 mm bore metal piston ring represented an important structural improvement for durability and reliability at the time.

Despite its outward simplicity, this single-cylinder stationary engine became an entry point into mechanical restoration and engine study for generations of enthusiasts. Its straightforward design rewarded hands-on maintenance and long-term operation, often serving as the first engine through which deeper mechanical understanding was developed.

Historical Reference Notice

This product is an independently manufactured mechanical model inspired by early 20th-century stationary engine designs. It is not affiliated with, endorsed by, or produced by any original engine manufacturer or brand. All historical references are used strictly for educational and descriptive purposes.

Specifications: 

.Material: Metal + Wood
.Color: Green
.Model: L-D
.Form: Ready to Run (RTR)
.Engine Type: Gasoline Internal Combustion Engine
.Cylinder: Vertical Single Cylinder
.Stroke: Four-stroke
.Displacement: 3.6cc
.Bore: 16.0mm
.Stroke: 18.0mm
.Speed: 500-3000rpm
.Power: Approx. 0.2ps
.Starting Method: Manual/Drill Starter
.Cooling Method: Evaporative Water Cooling
.Lubrication Method: Mixed Oil Splash-Lubrication
.Lubrication Ratio: Gasoline/Engine Oil 25:1 to 30:1
.Ignition Method: Mechanical Trigger Ignition (Including Igniter, free gift)
.Spark Plug: Imperial Thread 3/16-40 (Including Spark Plug) free gift
.Starting Power: 1.5V AA Battery *1 (Battery Not Included)
.Fuel: Recommended 92# Gasoline or Higher (Not Included)
.Engine Oil: Recommended 2T/4T 10W50 Engine oil (Excluding Lubricant)
.Product Weight: 2000g
.Package Weight: 2240g (Including Frame)
.Product Dimensions: 20.8*15.1*17.2cm

.Package Dimensions: 35 x 20 x 25cm
.Packing: Graphic Carton
.Age: 16+

Package List

.Engine *1

.Spark Plug(free gift)*1

.coin(free gift)*1
.decals(free gift)*1
.Equipment Box *1
.Wooden Base *1
.Fuel Tank *1
.Fuel Line *1
.Drill Starter Rod *1
.Accessory Pack *1
.Instruction Manual *1