Great Power GP178 178cc Twin Cylinder Gasoline Engine
The Great Power GP178 is a high-performance 178cc twin-cylinder, two-stroke gasoline engine designed for large-scale RC aircraft. Combining impressive power with smooth operation and low vibration, it is an excellent choice for demanding aerobatic and giant-scale applications.
With a manufacturer-rated output of 21.5 horsepower, the GP178 is designed to deliver strong performance across a wide RPM range. Its carefully engineered mechanical design provides a balanced combination of power, smoothness and reliability.
Key Features
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178cc twin-cylinder, two-stroke gasoline engine
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Manufacturer-rated output of 21.5 HP
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Designed for large-scale 37–42% RC aircraft
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Smooth operation with reduced vibration
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Walbro WB-27 carburettor
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Electronic ignition system
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NGK CM-6 spark plugs
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Suitable for demanding aerobatic and sport flying
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Great Power (GP) |
| Model | GP178 |
| Engine type | Twin-cylinder, 2-stroke |
| Displacement | 178cc |
| Bore | 53mm |
| RPM range | 1,100–9,000 RPM |
| Output | 21.5 HP |
| Engine weight | 3,550g |
| Ignition weight | 202g |
| Muffler weight | 430g |
| Carburettor | Walbro WB-27 |
| Spark plugs | NGK CM-6 |
| Fuel | 92-octane unleaded gasoline |
| Fuel/oil mixture | 40:1 |
| Recommended propellers | 30×13, 32×10, 32×11 |
Recommended Applications
Designed for 37–42% giant-scale RC aircraft, including large aerobatic and sport models.
Recommended Propellers
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30×13
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32×10
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32×11
Fuel Requirements
Use unleaded gasoline mixed with suitable synthetic two-stroke oil at the manufacturer's recommended 40:1 ratio. Follow the engine manual for fuel preparation, break-in and operation.
Package Contents
GP178 with ignition module, mufflers and mounts.
Genuine Great Power Engine: Supplied through Aeromodellingtutor with support for RC aeromodelling enthusiasts.