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Before beginning assembly, please read these instructions thoroughly.
GX21
ENGINE
1
Throttle Lever : Adjusts amount of air-fuel mixture inflow and controls engine rpm.
2
Carburetor : Mixes air and fuel appropriately to control engine running.
3
High-Speed Needle : Adjusts the amount of fuel inflow for the mixture.
4
Idle Speed Screw : Adjusts the carburetor opening when idling.
5
Glow Plug : Ignites the compressed air-fuel mixture.
6
Recoil Starter : Starts the engine.
7
Low-Speed Needle : Adjusts volume of air and fuel in mixture.
●EQUIPMENT NECESSARY FOR STARTING
THE ENGINE (NOT INCLUDED)
1. Fuel for R/C models:
Use glow fuel (available in all R/C hobby shops).
Never use gasoline, kerosene or
alcohol instead of glow fuel!
This may cause fire!
Warning
2. Glow Plug:
Use a high performance glow plug.
(G Glow Plug from KYOSHO No.74905)
3. Booster Cord or One-touch Glow Plug Heater, and Batteries:
Used for heating and electrifying the glow plug.
4. Plug Wrench:
For removals when examining or exchanging the glow plug.
(Cross Wrench (5.5 / 7.0 / 8.0 / 10mm) from KYOSHO No. 80164)
5. Fuel Filter:
(Fuel Filter from KYOSHO No. 1876)1. Fuel for R/C models:
Use glow fuel (available in all R/C hobby shops).
A fuel bottle comes in very handy for quick and neat
refillings of the tank.
(Fuel Bottle 500cc from KYOSHO No. 96423)
ENGINE
1
2
3
●ENGINE MOUNTING
The position for mounting the engine depends largely on the
model itself! Follow the instruction manual supplied with the
model to mount the engine properly.
●ENGINE STARTING & BREAK-IN
Adjust the High-Speed Needle and Low-Speed Needle to
their standard position as follows:
High-Speed Needle
1
3 turns unscrewed
from closed position.
Low-Speed Needle
2
Adjustments
of glow plug and glow fuel.
As long as the engine is hot, avoid
touching anything except the High-Speed
Needle! If disregarding this warning, you
Warning
may cause burn injuries.
4
INSTRUCTION MANUAL
No.74023BK
4
Tighten the screw so that
the space to be 0.5mm
like the drawing.
Low-Speed Needle Screw
~
may slighty vary according to the type
1
2
R
THE FINEST RADIO CONTROL MODELS
5
6
7
Tighten
Unscrew
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