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NGH GF38-GE Owner's Operating Instruction Manual

4-stroke rc gasoline engines

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Dear customer:
Thank you for purchasing NGH GF38-GE 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-GE. 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-GE 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
Volume:37.97cc
Mix Output:3.58 HP/6800rpm
Ignition:NGH Automatic advancing angle ignition (RoHS and CE Certified;Rcexl Manufactured)
GF38-GE 4-Stroke RC Gasoline Engines
Owner's Operating Instruction Manual
1
Stroke:31.8mm
Carburetor:Walbro WT962
RPM Range:1800-6800rpm

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Summary of Contents for NGH GF38-GE

  • Page 1 4-stroke engine. You will be delighted with stability, fuel economy, energy saving, environmental protection, low noise, large torque output of your NGH GF38-GE. We hope that you will enjoy with your the engine, and have many fun and safe flying experiences with its use.
  • Page 2 FIG. 1 FIG. 2 NGH-GF38-GE four-stroke gasoline engine used Walbro WT carburetor is designed for NGH unique. It has the perfect stability of idle speed and acceleration sensitivity. Always remove fuel from the carburetor after flight. Not doing so will result in rubber carburetor is components deteriorating over time, causing loss of engine performance.
  • Page 3: Valve Clearance Adjustment

    position of ②, adjust ⑥ and ⑤ will obtain the better idling speed. The initial setup of the carburetor is factory settings, the engine first start don’t need to adjust. The factory setting status: ④—High speed needle, Fully closed (clockwise) before exiting(anticlockwise) 1.5-1.75 times; ⑤—Idle speed needle, Fully closed (clockwise) before exiting(anticlockwise) 1.5-1.75 times;...
  • Page 4: Engine Installation

    Engine installation: NGH-GF38-GE 4-stroke engine need to use rail bracket mount on a suitable RC aircraft. It can effectively reduce the high frequency vibration of four-stroke engine running at a high speed. As shown below: Notice: Please make sure to install a firewall on the back of RC aircraft using metal flat washer or ratchet nut to prevent the pawl bolt into plywood.
  • Page 5 Engine Break-in: Please use the high quality synthetic oils, gasoline and machine oil’s mixing ratio is 35:1. NGH is recommended to use smaller size propellers at first break-in and follow-up about 10 times in flight. Keep medium speed running for 15 minutes (no more than 4000rpm) after started engine, then high speed running (6500 rpm) for 3 minutes, again medium speed running for 5 minutes, high speed running for 3 minutes, reciprocating 3-5 times complete break-in.