The function of each cord;
(1) Plug cord (meshed high tension cord)
When you put on the plug cap, insert it to the plug until you can hear clicky sound to avoid coming off during flight.
And then pull the plug cap to make sure that it wonʼt come off.
(2) Sensor cord (Black cord)
Connect with the cord from the sensor attached to the engine.
(3) Battery cord (Black/Red cord)
Please use the fully charged battery that has adequate spec (6-8.4V, more than 1000mA is recommended.). Between the
battery and main unit, make sure to set an ignition switch whose capacity is higher than 3A.
(4) Tachometer cord (Brown/Red/Orange cord)
Optional on-board tachometer can be attached.
8. Carburetor
A carburetor with a pump developed exclusively for our small-size four cycle gasoline engine is mounted, instead of using
muffler pressure. Since the carburetor with a pump introduces the air from the air hole shown in the next figure, set it 2mm or
more apart from the firewall or drill a hole on the firewall.
When adjusting the carburetor, refer to Fig.7.
Main needle: To adjust the speed at the time of full open of the throttle valve.
Slow needle: To adjust the speed from the idling to the middle speed.
Turning each needle in clockwise direction, the fuel will become leaner and the rotation speed will increase. Turning it in
counterclockwise direction, the fuel will become richer and the rotation speed will decrease.
For the reference
The following data for the
needle adjustment is iunder
the condition of APC13x7 prop
and about 8800rpm.
The engine is installed in the
inverted position.
Opening width of the needles
vary depending on the
atmosphere, prop, installing
position etc.
Main needle:
4/5~1turn open from full
close
Slow needle:
5~5+3/4 turn close
(1.7~2.0mm) from the
surface of the throttle lever.
Adjustment range tend to be
narrow as displacement is
smaller.
-3-
7. Sensor position and Power / Starting easiness
The ignition sensor can be moved to CW (advance the spark timing) or CCW (delay the timing) as Fig.6 shows.
At the factory default the sensor is fixed on the center (neutral) position. The reason is related to the methods of engine starting.
・With an electric starter-You can start wherever the sensor is fixed.
So you can set the sensor as the rpm reaches maximum speed.
・By hand flip (Manual start)-Starting easiness depends on the sensor position.
The factory default is set as you can start by hand flip and also get highest rpm in that range as possible.
If you prefer easiness of hand starting, move the sensor to CCW direction to delay the spark timing. But then the maximum rpm
will slightly decline.
If you prefer power (highest rpm), move the sensor to CW direction. But then you can't start by hand flip but only with starter.
In addition by the feature of the ignition system, it heats up with engine running. When you restart the engine by hand flip, you
should open the throttle valve slightly while it's hot. And it's better to enlarge the choke without wetting the plug.
For safety we recommend to use an electric starter.
Sensor
Plug cap
(2)Sensor cord
(Black)
Fig.5 Ignition system
(
G17-153
)
(1)Plug cord
Main unit
(3)Battery Cord
(Red/Black)
(4)Tachometer cord
(Brown/Red/Orange)
Fig.6
NeutralPosition
Hand start
easy area
Delay
Sparktiming
Advance
Sparktiming
CCW
CW
Prop rotation
(CCW)
View from front
Recommended battery
5cell-NiMH
2cell-LiPo
Voltage:6-8.4V
Capacity: More than 1,000mA
Switch (not included)
Capacity: More than 3A
Note: The carburetor for the gasoline engine is the assembly of very strict and delicate parts. So please make sure to use filtered gasoline.
Moreover, DO NOT disassemble by yourself. If thereʼre any troubles regarding carb, please consult the shop from which you bought the engine.
Thread into about 5~5+4/5 turns
(Approx.1.7~2.0mm from
the Reference plane)
Fig.7
