The UMS 2-Cylinder 200cc Petrol Twin Boxer Engine delivers exceptional torque, smooth 4-stroke performance, and reduced vibration thanks to its horizontally opposed configuration. Precision CNC-machined and built from aircraft-grade materials, this 200cc powerhouse is designed for serious large-scale aircraft applications.

Product Description

The UMS 2-200cc Twin Boxer Engine is a high-output 4-stroke petrol engine engineered for demanding scale aircraft and professional RC builds. Featuring a horizontally opposed twin-cylinder (boxer) layout, the engine benefits from natural balance, reducing vibration while delivering smooth, consistent power throughout the RPM range.

With an impressive 200cc displacement and approximately 25kgf of thrust, this engine is ideally suited to large-scale warbirds, aerobatic aircraft, and heavy RC platforms requiring strong torque and dependable performance.

Premium Construction Engineering

Durability begins with aircraft-grade alloy cylinder heads and crankcases, providing superior strength and thermal stability under high-load conditions. All major components are CNC-machined from aluminium and bar stock, ensuring tight tolerances and long-term reliability.

Internally, the engine features:

• Billet aluminium pistons for optimal strength-to-weight ratio
  
• Hardened steel piston rings for improved sealing and wear resistance
  
• Hard-chromed and precision-lapped cylinder bores for reduced friction and enhanced longevity
  
• Hardened steel camshafts for accurate valve timing and durability under sustained load
  
• The precision-lapped bores promote consistent compression and efficient combustion, while chrome plating enhances corrosion resistance and service life.

Smooth Power Delivery

The boxer configuration minimises vibration, protecting airframes and onboard electronics while improving throttle response. The spark ignition system with front-side magnet ensures dependable starting and reliable performance across the operating range.

Designed to run on petrol fuel, this engine provides smooth idle characteristics and strong mid-to-high RPM power, making it a trusted solution for experienced builders and professional pilots alike.

Key Features

• 2-cylinder horizontally opposed (boxer) 4-stroke engine
  
• 200cc displacement delivering approx. 25kgf thrust
  
• Naturally balanced design for reduced vibration
  
• CNC-machined aluminium and bar stock construction
  
• Aircraft-grade alloy heads and crankcases
  
• Billet pistons with hardened steel rings
  
• Hard-chromed and lapped cylinder bores
  
• Hardened steel camshafts for long-term reliability
  
• Front-side magnet spark ignition system
  
• Designed for large-scale and high-performance aircraft

Perfect For

• Large-scale RC warbirds
  
• Aerobatic aircraft models
  
• Heavy-scale competition builds
  
• Professional and advanced hobby applications
  
• Aircraft requiring strong torque and smooth 4-stroke power

Specifications

• Engine Type: 4-Stroke Spark Ignition
  
• Configuration: Two-Cylinder Boxer (Horizontally Opposed)
  
• Displacement: 200cc
  
• Bore: 52mm
  
• Stroke: 48mm
  
• Approx. Thrust: 25kgf
  
• RPM Range: 1,000 – 5,000
  
• Weight (with silencer & ignition): Approx. 6.0kg
  
• Head-to-Head Length: 352mm
  
• Engine Length: 228.5mm
  
• Recommended Propellers:
  
  • 32×14
    
  • 33×14
    
• Ignition: Front-Side Magnet
  
• Spark Plug: CM-6
  
• Carburettor: Walbro
  
• Fuel Type: Petrol

Why Buy from Probuild Aircraft

✅ Official UK stockist – 100% genuine UMS engines
✅ Trusted by top international pilots and builders
✅ Fast UK shipping and secure packaging
✅ Supplying and supporting pilots since 1993

Manual: