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Build It. Start It. Watch a Real Twin-Cylinder Engine Come to Life.
The ENGINEKITOR F2 is a real working 7.5cc inline twin-cylinder, 4-stroke engine model kit designed for builders who want more than a static display model.
Featuring an SOHC valve train, circulating water cooling, CDI ignition and electric starting system, the F2 lets you experience the complete process of assembling, starting and tuning a miniature internal combustion engine.
- Real Working 7.5cc Engine
- Inline Twin-Cylinder Design
- 4-Stroke Internal Combustion
- SOHC Valve Train
- 1,600–12,000 RPM
- Circulating Water Cooling
- Mechanical Water Pump
- CDI Electronic Ignition
- Electric Motor Start
- Precision Metal Construction
- Build, Run, Tune & Modify
A Real Engine — Not Just a Display Model
The ENGINEKITOR F2 reproduces the essential mechanical systems of a full-size four-stroke engine on a compact scale.
Inside the engine, two pistons, connecting rods, crankshaft, camshaft and valves work together through the complete four-stroke cycle:
Intake → Compression → Power → Exhaust
Once correctly assembled and connected to the required fuel, ignition and cooling systems, the engine can actually start and run.
You are not simply building an engine model.
You are building a real miniature engine.
Twin-Cylinder 4-Stroke Performance
The F2 uses two 3.75cc cylinders for a total displacement of 7.5cc.
Its inline twin-cylinder configuration provides a more advanced mechanical experience than a conventional single-cylinder engine.
Builders can directly observe and understand:
- Crankshaft movement
- Piston synchronization
- Valve timing
- Camshaft operation
- Intake and exhaust cycles
- Combustion timing
The result is a compact engine with authentic mechanical movement and a distinctive twin-cylinder running sound.
Active Water Cooling
Real combustion produces real heat.
The ENGINEKITOR F2 uses a circulating water-cooling system with an integrated mechanical water pump to help maintain operating temperature.
When used with the complete starter setup, coolant circulates between the engine and radiator while the engine is running.
This adds another realistic working system to the overall engine experience.
SOHC Valve Train
The F2 features a Single Overhead Camshaft (SOHC) design.
The camshaft controls the opening and closing of the intake and exhaust valves while remaining synchronized with the crankshaft.
During assembly, builders can directly understand how valve timing, piston movement and combustion work together inside a four-stroke engine.
Electric Start + CDI Ignition
The ENGINEKITOR F2 uses an electric starter motor together with a CDI ignition system.
Hall sensing and spark plugs provide controlled ignition while the starter system makes repeated startup more convenient.
This allows you to experience the complete process:
Fuel → Spark → Combustion → Mechanical Power
Built to Run, Tune & Explore
Assembly is only the beginning.
Once running, the F2 allows builders to experiment with:
- Engine startup
- Idle adjustment
- Throttle response
- Fuel mixture
- Operating RPM
- Cooling performance
The engine operates at approximately:
1,600–12,000 RPM
For experienced hobbyists, the compact engine can also serve as a foundation for custom mechanical or RC projects.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ENGINEKITOR |
| Model | F2 |
| Engine Type | Internal Combustion Engine |
| Configuration | Inline Twin-Cylinder |
| Stroke | 4-Stroke |
| Displacement | 7.5cc |
| Cylinder Displacement | 3.75cc × 2 |
| Valve System | SOHC |
| Bore | 16.68 mm |
| Stroke Length | 17 mm |
| Speed | Approx. 1,600–12,000 RPM |
| Cooling | Circulating Water Cooling |
| Water Pump | Mechanical Water Pump |
| Starting | Electric Motor Start |
| Ignition | CDI Ignition |
| Spark Plug | ME-8, 1/4"-32 |
| Recommended Battery | 7.4V 2S / 11.1V 3S |
| Material | Metal |
| Size | 103.8 × 79.6 × 92.4 mm |
| Weight | Approx. 680 g |
Choose Your Version
Engine Kit
Suitable for experienced users who already have compatible ignition, starting and operating equipment.
Package includes:
- ENGINEKITOR F2 Engine Kit
- Assembly Instructions
- User Manual
- Hex Wrench Set
Engine + Starter Kit
Recommended for most buyers.
Designed to provide a more complete setup for assembling and operating the engine.
Depending on the selected package, accessories may include:
- ENGINEKITOR F2 Engine
- Metal Base
- CDI Ignition
- Hall Sensor
- Fuel Tank
- Water Tank
- Radiator
- Fuel & Water Tubing
- Battery
- Battery Charger
- Spark Plugs
- Spark Plug Wrench
- Assembly Manual
Please refer to the selected package option for the exact included accessories.
Who Is It For?
The ENGINEKITOR F2 is ideal for:
- Engine enthusiasts
- Mechanical model collectors
- DIY builders
- STEM and engineering education
- RC hobbyists
- Mechanical gifts for adults
Frequently Asked Questions
Does the ENGINEKITOR F2 really run?
Yes. It is a functional miniature four-stroke internal combustion engine rather than a static display model.
Is it fully assembled?
No. It is designed as an assembly engine kit so builders can experience the internal mechanical structure.
How many cylinders does it have?
Two cylinders in an inline configuration.
What is the displacement?
7.5cc total, with two 3.75cc cylinders.
How is it cooled?
It uses circulating water cooling with a mechanical water pump.
How is it started?
The engine uses an electric motor starting system.
Does it use CDI ignition?
Yes. The complete running setup uses CDI electronic ignition.
Can it be used for RC projects?
It has potential for advanced RC and custom mechanical projects, but additional transmission, mounting and control components may be required.
Important Safety Information
This is a real working internal combustion engine, not a conventional toy.
Always:
- Operate in a well-ventilated outdoor environment.
- Keep fuel away from flames and sparks.
- Secure the engine firmly before starting.
- Keep hands and loose objects away from rotating parts.
- Wear suitable eye protection.
- Allow hot engine parts to cool before touching.
- Follow the supplied assembly and operating instructions.
Recommended for experienced hobbyists and users aged 14+ with responsible adult supervision.
FAQs
Yes. We offer worldwide free shipping with no minimum spending limit.
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If you receive a damaged product, do not throw away the packaging. Please contact us immediately at service@enginekitor.com. We will deal with it without a doubt.
We offer a part replacement service. Please click here to learn more about how to apply for it.
The Processing Time will be 1 - 5 business days after we receive your orders.
The estimated arrival time of your orders is Processing Time + Shipping Time.
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the customs taxes are not included in the shipment, which is needed by the customers themselves. we provide free shipping service only. Different country has different customs policies.
Normally, we can send it duty-free for American & European parcels via Standard Shipping methods. but please note that it's not duty-free for European parcels with Express Shipping. more details please contact us.
