NGH GT25 Owner's Operating Instruction Manual

Dear customer:
Thank you for purchasing our NGH GT25 gasoline engine. Professional GT25 engine has been developed by NGH
engineers to offer all hobbyists gasoline engine. You will be delighted with fuel economy, reliability and power of your
GT25. We hope that you will enjoy with your new engine, and have many fun and safe flying experiences with its use.

Safety Instruction and WARNINGS!

Please read the instruction manual to become familiar with the features of the product before operating. Failure to
operate the product correctly can result in damage to the product, personal property and cause serious injury.
GT25 engine is NGH R&D manufacturing precision products. It must be operated with caution and common sense and
requires some basic mechanical ability. This product is not intended for use by children without direct adult supervision.
Don't attempt disassembly, use with incompatible components or augment product in any way without the approval of
our company. It is to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in
order to operate correctly and avoid damage or serious injury.
Age Recommendation: RC engine is not a toy! Not for children under 15 years.
The engine is designed for use on a model radio control airplane. If it is used for any purpose, we cannot be responsible
for its reliability of safety.
·NGH or their dealers aren't responsible for any loss, injury or damage resulting from the miss-use of RC engine.
·Keep away from the rotating propeller area while operating the engine.
·Do not wear loose clothing near the engine or the propeller.
·Do not operate the engine near loose material such as dirt, gravel, ropes, sand, etc.
·Always run your model engine in a well-ventilated area. Model engines produce possibly harmful carbon monoxide
fumes.
·Always ensure that the propeller is securely attached to the engine shaft and all retaining fasteners are tightened
properly before each flight.
·Always stand clear of and behind the propeller, ensure the face and body are far away from the propeller blade after
trajectory. Never allow anyone, to be in front of or to the sides of the propeller when starting or running the engine.
·Always ensure that small parts in the children can't touch place to prevent children from swallowing parts;
·Always check the propeller nut tightening.
·Gasoline is extremely flammable. Be careful of any sparks from electrical contacts such as fuel pumps, battery
charger, etc.
·Allow your engine stop and cool before touching or fueling. The running engine of the surface temperature is high,
easy to cause burns and other personal injury.
·Be sure to check whether there are loose bolts before flying. When install a muffler, the muffler in the threads of the
screw into the engine exhaust, until twist fixed, it is recommended to use screw glue.
·Ensure the engine and muffler in aircraft fairing environment with cold air, make sure the engine cooling.

Product Specifications:

Type：2 Cycle Air Cooled Gasoline Engine（Only used for fixed-wing aircraft model）
Volume：25cc
Stroke：29 mm
Mix Output：2.97HP@11000RPM
Ignition：NGH automatic advancing angle ignition (RoHS and CE Certified；Rcexl Manufactured)
Ignition Power：DC 4.8V - 8.4V 1000mAH
Fuel: Standard 92 octane gasoline + FD 2-stroke oil
Recommended propeller：16x8、16x10、17x8、17×10
GT25 2-Stroke RC Gasoline Engines
（Two blades）
Owner's Operating Instruction Manual
Bore：33.2 mm
Carburetor：Walbro WT962
RPM Range：1800-11000RPM
Spark plug type：1/4 - 32
Mixing ratio： gasoline : oil = 35:1
Weight：engine 740g、ignition 100g、
muffler 130g
1