Great Power GP123 Twin Gas Engine

When performance meets affordability, you get the GP-123 Twin Gas Engine—the ultimate power solution for 35% aerobatic aircraft. With a 123cc displacement and a 12HP output, this engine is purpose-built for intense 3D manoeuvres, offering smooth operation and unmatched reliability.

A specially designed crankcase ensures equal fuel distribution to both cylinders, minimizing vibration and maximizing durability. With a wide RPM range and compatibility with various prop sizes, the GP-123 gives pilots the flexibility they need for any aerobatic challenge.

Features:

• 123cc displacement with 12 horsepower output

• Dual-cylinder design for balanced performance

• Optimized crankcase for reduced vibration

• Durable, lightweight, and built for aggressive 3D flight

• Walbro MJ-71 carburettor and NGK CM-6 spark plugs

• Includes 2 mufflers and a 2-year warranty by Probuild Aircraft Ltd

Specifications:

• RPM Range: 1600–8900

• Compression Ratio: 9.2:1

• Fuel: 92 Octane Unleaded (40:1 mix)

• Recommended Props: 27x11, 28x10, 28x12, 29x9, 29x10

• Weight: Engine - 2300g, Ignition - 202g, Mufflers - 330g

Whether you're upgrading or building from scratch, the GP-123 delivers elite-level performance at a competitive price point.