A Living Piece of Industrial History,
Lit by Your Own Hand
Some machines only grow more captivating with time. This is more than a hit-and-miss engine — it is a breathing, miniature power station from the golden age of craftsmanship. Start it by hand, settle into its unhurried rhythm, and watch it light a vintage lamp: the pulse of machinery meeting the glow of electric light, a century later, on your desk.
A Piece of Industrial History, Ready the Day It Arrives
Most model engines arrive as a box of parts — and a weekend (or three) of assembly and carburetor tuning before the first pop. This one is fully adjusted and test-run at the factory. Your setup is minutes, not days: connect the CDI ignition module and battery box, install the chimney, mix fuel, and start.
A Typical Engine Kit
- Hours of assembly before first start
- Carburetor & timing tuning required
- Generator sold separately, DIY wiring
- Great for builders — a project first
This RTR Power Set
- Runs the day it arrives — connect, fuel up, start
- Factory-adjusted and test-run before shipping
- Generator, belt drive and meter already aligned
- Great for collectors & display — a running exhibit
Fire… Coast… Coast… Fire.
A hit-and-miss engine only fires when it must, coasting on its flywheels between power strokes — the lazy, unhurried bark that once echoed across farms a century ago, and that no modern engine can imitate. It doesn't just run; it breathes. Switch the lamp on and listen closer: the engine fires faster to carry the light, exactly as it did when machines like this lit a farmhouse's first electric bulb.
Everything On One Base — Watch Fuel Become Electricity
Nothing is hidden inside a case. From combustion to electrons, you can point at every stage of the conversion while it happens.
Horizontal Hit & Miss Engine
Classic single-cylinder layout in machined aluminum, with the governor mechanism in plain view on the crankshaft.
Twin Stainless Flywheels
Polished stainless rims store the momentum that carries the engine through its "miss" strokes — the heart of the hit-and-miss rhythm.
Open Water Hopper
The square tank above the cylinder is the cooling system — fill it with water and let evaporation carry the heat away, exactly like the originals.
Copper Drip Oiler
A working sight-glass oiler feeds the cylinder drop by drop. Brass fuel valve alongside — details usually reserved for full-size restorations.
Open-Frame Generator
Belt-driven from the crankshaft, with its copper windings fully exposed. You can watch mechanical motion become current.
Dual Live Meters + USB Output
Two digital displays read out both channels in real time — 12V and 5V side by side — while the onboard USB port delivers power straight to your phone.
When the Pulse of Machinery Meets the Flicker of Light
This is where it stops being a model and becomes a power plant. The engine's motion belts into the open-frame generator, the dual meters come alive — then clip on a lamp and watch combustion turn into light, the way farmhouses first made their own electricity.
The lamp channel — for the ritual of lighting a vintage bulb with your own engine.
- Vintage-style 12V bulbs — see it glow in the photo below
- LED strips, small DC fans & motors
- Workbench demo circuits
- Laptops or household appliances
A modern port on a century-old idea — standard USB-A, wired to the onboard regulator.
- Charges phones & small USB devices
- Live voltage on the digital meter
- USB-C PD fast-charge protocols
Three Steps From the Box to the First Pop
1 · Set Up & Connect
Connect the CDI ignition module and battery box (4× AA batteries — they power the ignition only), and install the chimney. Everything is plug-in; no tuning needed.
2 · Fuel, Water & Checks
Mix regular gasoline with 2T two-stroke oil (garden-machinery type) at 25:1 (gasoline : 2T oil), fill the tank, and add water to the open hopper. Before starting, confirm the spark is firing and there's no air trapped in the fuel line.
3 · Start & Set the Pace
Spin it up with the included drill-start adapter (electric drill not included) or the manual recoil starter. Dial from a lazy 1200 RPM idle to a busy 3000 RPM. Shut down by cutting ignition power or closing the fuel valve.
Specifications
| Engine Type | Horizontal single-cylinder gasoline, hit-and-miss governor |
|---|---|
| Material & Finish | CNC-machined aluminum, copper and stainless steel, anodized finish; wooden display base |
| Piston Rings | Dual metal piston rings |
| Cooling | Evaporative water cooling (open hopper) |
| Fuel | Regular gasoline (motorcycle/automotive grade) mixed with 2T two-stroke oil (garden-machinery type), mixed at 25:1 |
| Speed Range | 1200 – 3000 RPM, adjustable |
| Starting | Drill start (adapter included, electric drill not included) or manual recoil start |
| Shutdown | Ignition power cut or fuel cut |
| Ignition Power | DC 4.2–6V — 4× AA batteries in included battery box (ignition only, not the generator) |
| Generator Output | DC 12V 40W + USB 5V 20W (USB charges phones directly) |
| Product Size / Weight | 23 × 13 × 13 cm · 2300 g |
| Package Size / Weight | 28 × 18 × 18 cm · approx. 2500 g, boxed |
| Recommended Age | 16+ (adult supervision advised) |
What's in the Box
- 1 × Gasoline Generator Model (engine + generator assembly)
- 1 × CDI Ignition Module
- 1 × Battery Box (uses 4× AA, batteries not included)
- 1 × Wooden Base
- 1 × Starter Adapter (for electric drill)
- 1 × User Manual
Note: electric drill, AA batteries, fuel and 2T oil are not included.
Frequently Asked Questions
Grow the Collection
RETROL HM-01 Hit & Miss Engine
The same century-old rhythm in a smaller footprint, with a resonating exhaust pipe and quick-slow speed switch. Choose the kit and build it yourself, or go RTR.
View HM-01 →RETROL D16 Diesel Stationary Engine
The gasoline set's diesel sibling — a compression-ignition workhorse with a completely different voice, for hobbyists who enjoy tuning a real diesel.
View D16 →