The Great Power GP-38 Gas Engine delivers exceptional reliability and strong performance for a wide range of RC aircraft. With a 38cc displacement and 5 horsepower output, it strikes the perfect balance between power and efficiency — ideal for small to mid-size models that demand precision, smooth throttle response, and dependable operation.

Running smoothly across a broad RPM range of 1400–10,000, the GP-38 is equally at home in relaxed sport flying and high-energy aerobatics. The Walbro HDA-246 carburettor and NGK CM-6 spark plug ensure consistent combustion, easy starts, and efficient fuel delivery.

Built for long-term durability, the GP-38 operates on a 40:1 unleaded gasoline/oil mix, offering smooth, low-vibration performance. Included mufflers reduce noise while maintaining strong exhaust flow. Backed by a 2-year Probuild Aircraft Ltd warranty, the GP-38 combines performance, reliability, and value in one compact package.

Key Features

✅ 38cc displacement delivering 5 horsepower
✅ Smooth and reliable performance across 1400–10,000 RPM
✅ Walbro HDA-246 carburettor for precise fuel control
✅ NGK CM-6 spark plug for consistent ignition
✅ Lightweight and fuel-efficient design
✅ Operates on 89–92 unleaded gasoline (40:1 mix)
✅ Includes mufflers
✅ 2-year warranty by Probuild Aircraft Ltd

Recommended Propellers

• 20x8 (2-blade)

• 20x9 (2-blade)

• 20x10 (2-blade)

• 21x8 (2-blade)

Perfect For

• Small to mid-size RC aircraft

• Aerobatic and sport flying

• Pilots seeking smooth throttle response and long-term reliability

• Builders upgrading to a compact, fuel-efficient gas engine

Product Summary

The Great Power GP-38 Gas Engine combines power, efficiency, and smooth operation in a compact design. With its wide RPM range, reliable ignition, and precision engineering, it’s the perfect choice for pilots who want dependable performance and easy maintenance — flight after flight.

Why Buy from Probuild Aircraft Ltd

✅ Official UK Great Power Engines Stockist
✅ 100% Genuine Products
✅ Trusted by Top International Pilots
✅ Fast, Reliable UK Shipping
✅ Supporting RC Pilots Since 1993