Before beginning assembly, please read these instructions thoroughly.
GXR28
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
Needle Valve : Adjusts the amount of fuel inflow for the mixture.
4
Idle Adjustment Screw : Adjusts the carburetor opening when idling.
5
Glow Plug : Ignites the compressed air-fuel mixture.
6
Recoil Starter : Starts the engine.
7
Idle Mixture Screw : 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 fires!
Warning
2. Glow Plug:
Use a high performance glow plug.
(GS Glow Plug from KYOSHO No.74902)
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.
(Locking Jig & Wrench Set from KYOSHO No. 80312)
5. Fuel Filter:
(Fuel Filter from KYOSHO No. 1876)
A fuel bottle comes in very handy for quick and neat
refillings of the tank.
(Quick-Fill Fuel Bottle 250cc / 500cc from KYOSHO
No. 96421 / 96422)
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 needle valve and air/fuel mixture adjustment
screw to their standard position as follows:
1
Needle Valve
4 turns unscrewed
from closed position.
2
Air/Fuel Mixture Adjustment
Air/Fuel Mixture Adjustment Screw
Adjustments
~
may slighty vary according to the type
1
2
of glow plug and glow fuel.
As long as the engine is hot, avoid touch-
ing anything except the needle valve! If
disregarding this warning, you may cause
Warning
burn injuries.
THE FINEST RADIO CONTROL MODELS
INSTRUCTION MANUAL
No.74025
5
6
7
4
Tighten
Unscrew
Tighten the screw so that
the space to be 0.5mm
like the drawing.
R