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GF38 4-Stroke RC Gasoline Engines 

Owner

s Operating Instruction Manual 

 

Dear customer: 

Thank you for purchasing NGH GF38 4-stroke gasoline engine. the engine has been developed by NGH engineers to 
offer  all  hobbyists  a  new  4-stroke  engine.  You  will  be  delighted  with  stability,  fuel  economy,  energy  saving, 
environmental protection, low noise, large torque output of your NGH GF38. We hope that you will enjoy with your the 
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. 
GF38 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

4 - stroke air cooled gasoline engine

Only used for fixed-wing aircraft model

 

Bore

39mm 

Stroke

31.8mm

 

Volume

37.97cc 

Carburetor

Walbro WT1022 

Mix Output

3.58 HP/8300rpm 

RPM Range

1600-8000rpm 

Ignition

NGH Automatic advancing angle ignition    (RoHS and CE Certified

Rcexl Manufactured) 

Ignition Power

DC 4.8V - 8.4V    1000mAH 

Spark plug type

CM6 

Fuel:  93#  Unleaded  gasoline  +  Fully  synthetic  lubricants   

(Non-4-stroke lubricants) 

Mixing ratio

  oil :Lubrication = 35:1 

Recommended propeller

18

×

8-10

19x8-10

20

×

Two blades

 

Weight

engine 1310g

ignition 100g 

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