Starting The Engine - Saito FG-14B & FG-20 Owner's Operating Instruction Manual

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F G - 3 0 / F G - 3 6 B E F O R E S T A R T I N G T H E E N G I N E
Preparation Before

Starting the Engine

(prior to break-in)
• Mount the engine on a strong, flat test
bench or on the aircraft. (In either case,
the engine should be secured so it is
immobile.)
• Check to make sure the throttle barrel will
open and close completely.
• Check the wiring of the ignition system to
make sure it is connected correctly and
securely.
• Make sure the fuel line is connected
securely to the carburetor.
• For break-in, use a fuel/oil mix ratio of
20:1.
• FG-36: Mount an 18 x 8 or 19 x 8 carbon
fiber propeller such as a Bolly or Mejzlik.
Be sure it has been balanced. (Remember
to check the tightness after every flight.)
• FG-30: Mount a 17 x 6 plastic or wood
propeller. Be sure it has been balanced.
(Remember to check the tightness after
every flight.)
• It is suggested you employ a spinner when
using an electric starter. (Remember to
check the tightness after every flight.)
• Use a tachometer to prevent over-revving
of the engine.
• Be sure to connect a gasoline-proof line
to the breather nipple to vent oil from the
airframe.
• Check the battery of the electric starter to
make sure it is fully charged. Be sure to
use a safety on/off switch from the battery
to the ignition.
Warning: Do not let people stand in
front of or to the side of the engine while
attempting to start it to avoid serious injury.
Also, make sure the engine test bench or
aircraft is completely secure from movement.
Starting the Engine
(assuming the engine is mounted in an
aircraft)
The carburetor on the Saito engine comes
adjusted to a basic setting. This setting should
be maintained during the initial break-in
runs. The standard carburetor settings are as
follows: the high-speed needle valve is set
from the fully closed position. The low-speed
or idle needle valve is set from the fully closed
position. Please refer to the diagrams.
FG-30 FG-36
High-speed 2 turns 2 turns
Needle 30 minutes 30 minutes
Low-speed 4 turns 4 turns
Needle 15 minutes 15 minutes
Before you first start the engine, make sure
the spark plug is screwed in and tightened,
and that the plug socket cap is fitted in place
and fastened down properly. Fix the ignition
sensor in the proper position at the bottom
of the engine crankcase. The throttle servo
should be mounted at a distance of 8 to 12
inches from the engine. The spark plug cable
must not touch any part of the model structure
as vibration may damage the shielded cable.
If this is not practical, it will be necessary to
provide an insulation material for the cable.
The ignition unit itself should be wrapped in
foam rubber to prevent engine vibration from
damaging the electronic components. All
components must be protected from contact
with engine fuel. Be sure to use an on/off
(Safety or "kill") switch to allow the ignition to
be turned off and on.
F G - 3 0 / F G - 3 6 S T A R T I N G T H E E N G I N E
Figure 5
FG-30/FG-36 CARB
Ball-joint for linkage
Low-Speed Needle Valve
Counter-clockwise direction
(for rich mixture)
Throttle lever
High-Speed Needle Valve
Counter-clockwise direction Clockwise direction
(for rich mixture) (for lean mixture)
iMPOrTanT: Never turn the engine over with
the ignition turned on unless the spark plug is
inserted in the plug socket. This could lead to
ignition damage.
note: Saito 4-stroke gasoline engines come
with a pumped carburetor. You do not have
to choke the engine as you normally would a
2-stroke engine.
When you are ready to start the engine, switch
the ignition on and set the throttle to a slightly
high-idle speed. We highly recommend the use
of an electric starter.
Be sure to have a helper hold the model
securely.
• Turn on the transmitter first, then the
receiver and check the operation of the
throttle servo and other controls.
• Turn on power to the ignition system.
• Using an electric starter, begin cranking
the engine. It should fire within seconds
of applying the starter. Allow the engine to
idle for 30 to 45 seconds.
• If the engine does not start, even after
using the electric starter to crank the
engine a second time, open the throttle
to maximum, turn off the ignition and
turn the engine over about 4 revolutions.
Switch the ignition on again and then
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Clockwise direction
(for lean mixture)