Experience precision engineering with the SEMTO ST-NF2 Mini Inline Double-Cylinder 4-Stroke Nitro Engine — a high-performance desktop internal combustion engine model designed for collectors, hobbyists, RC enthusiasts, and educational demonstrations. Featuring a realistic appearance with sporty red accents, this finely crafted miniature engine delivers an authentic mechanical experience while showcasing the beauty of real engine operation.

Manufactured from high-quality CNC-machined aluminum alloy with anodized finishing, the engine combines durability, lightweight construction, and exceptional detail. Its advanced inline twin-cylinder SOHC design utilizes a dual synchronous belt timing system to minimize gear skipping at high RPM, while the short rocker arm valve structure provides more accurate valve timing and smoother operation.

Powered by an asynchronous crankshaft configuration, the ST-NF2 offers strong and stable performance with operating speeds ranging from 4,000 to 16,000 RPM. The upgraded signal carburetor delivers improved throttle response and easier tuning, making operation more responsive and enjoyable. An integrated high-torque 480 brushed DC starter motor ensures reliable and convenient electric starting.

Perfect for DIY assembly and mechanical exploration, this engine allows users to observe internal combustion principles and moving mechanical components in action. It also pairs well with compatible gearboxes for future upgrades and custom projects. Whether displayed as mechanical artwork, used for educational purposes, or enjoyed as a functional engineering model, this engine is an impressive addition to any collection.

Specifications:
• Brand: SEMTO ENGINE
• Model: ST-NF2
• Engine Type: Mini Nitro Internal Combustion Engine
• Configuration: Inline Double-Cylinder
• Stroke Type: 4-Stroke SOHC
• Displacement: 7.0cc (3.5cc × 2)
• Cylinder Bore: 16.6mm
• Stroke Length: 17.0mm
• Speed Range: 4,000–16,000 RPM
• Power Output: 0.6ps
• Cooling System: Air-Cooled
• Lubrication: Mixed Oil Lubrication (Grease Added)
• Starting Method: Electric Start
• Starting Voltage: 7.4V 2S LiPo Battery (Not Included)
• Fuel Type: 20–25% Nitro Fuel
• Ignition System: Ignition Module Required (Not Included on Kit Version)
• Spark Plug Type: F-Type 4-Stroke Electric Plug (Not Included on Kit Version)
• Material: CNC Aluminum Alloy & Metal Components
• Product Size: 11.2 × 9 × 9.2cm
• Product Weight: 535g
• Recommended Age: 14+

Package Includes:
Kit Version:
• 1 × ST-NF2 Engine Model Kit
• 1 × Instruction Manual

Important Notes:
• Nitro fuel, ignition battery, and 7.4V LiPo battery are not included.
• Adult supervision is recommended for younger users.
• Ideal for collectors, RC hobbyists, engineering enthusiasts, and classroom demonstrations.