The internal diaphragm pump of the carburetor is driven by crank case pressure, which can provide sufficient fuel whatever the attitude of the aircraft and regardless of the tank position. This also eliminated the need for a reed, one less thing. GT25 is specially designed for ease of use and is suitable for 91-120 in size but holds the power of a 120.

The GT25 Pro incorporates the proven solid phosphor bronze connecting rod, the phosphor bronze connecting rod is more durable, and the wear resistance and durability far exceed that of a high-quality needle roller connecting rod. The cylinder liner is made of wear-resistant nodular cast iron, the tolerance of the bore in the cylinder is within 0.01mm, and the roundness tolerance of the inner hole of the aluminum alloy chrome-plated cylinder liner is 0.03mm. 

This economical rail mount engine is the exact size and should be a drop in for 91 - 120 in sizewhile having the power of a 120.

GT25 Product Features

*Front Walbro carburetor, reliable operation and simple debugging/tuning

* Lightweight design, powerful power output and excellent reliability

*Double needle roller bearing CNC carved connecting rod

*Single nut output shaft, you can choose a variety of propellers

*RCEXL auto-advance micro-ignition system specially made for NGH

*High-quality bearings