User Manual

8
Saito gasoline four-stroke engines come with the Saito
ignition system, composed of the ignition unit, a cord
for the sensor (black and white), insulated plug cap,
and cord (black and red) for connection to a battery (not
included). You will also need to secure an on/off switch
(safety switch system). The switch must carry a rating
of 3 amps.
Be sure to mount the ignition system in a location near
the engine and away from the receiver to prevent any
unwanted interference. Please refer to the diagram
below.
The Saito ignition has an operating voltage from
4.8–9.0 volts. Saito recommends the use of a 5-cell
Ni-Cd/Ni-MH battery or a 2-cell Li-Po/Li-Ion/Li-Fe with
a minimum of 1000mAh. The recommended battery is
the Team Orion
®
Avionics Li-Fe Receiver Pack 1300mAh
6.6V (ORI60503).
1/4-32
Spark gap = .4 to .5mm (.016 to .020 in)
The FG-14C, FG-17 and FG-21 come with the Saito
1/4-32 spark plug (SAIG20120). When needed,
replace with identical plugs.
Ignition System
Spark Plug
Carburetor
The carburetors used on gasoline four-stroke engines
are exclusive to Saito. Since they have a negative
pressure type fuel pump, the engine can be mounted in
any position.
NOTICE: Always remove fuel from the carburetor
after flight. Not doing so will result in rubber engine
components (such as the diaphragm) deteriorating
over time, causing loss of engine performance.
After a flying session, it is best to remove any fuel
remaining in the carburetor by disconnecting the fuel
line and running the engine until it is dry.
Do not needlessly disassemble the carburetor.
If you experience problems with the carburetor, return it
to the Saito Horizon Service Center.
Cord for plug (mesh)
Plug cap
Sensor
Battery
Cord for
ignition sensor
Cord for
Tachometer display
Cord for battery
Switch (capacity
more than 3A)
Unit
Battery
Voltage [6–8.4V]
Capacity: more than 1,000mA
Figure 4