17
• 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 carburetor 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-40: Mount an 18 x 8 or 19 x 8 carbon fiber
propeller such as a Bolly or Mejzlik. Be sure it has
been balanced. Check the tightness after every flight.
• FG-36B: Mount an 18 x 8 or 19 x 8 carbon fiber
propeller such as a Bolly or Mejzlik. Be sure it has
been balanced. Check the tightness after every flight.
• FG-30B: Mount a 17 x 6 plastic or wood propeller. Be
sure it has been balanced. Check the tightness after
every flight.
• It is suggested you employ a spinner when using an
electric starter. 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:
Always keep all spectators,
especially children, at least 30 feet away
when running or starting the engine.
WARNING:
Always ensure the aircraft is
secure and cannot move when preparing to
start the engine. Failure to do so could cause
property damage and serious injury.
Preparation Before Starting the Engine
(prior to break-in)
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-30B
FG-36B
FG-40
High-speed
needle
2 turns
30 minutes
2 turn
30 minutes
2 turn
30 minutes
Low-speed
needle
4 turns
15 minutes
4 turns
15 minutes
4 turns
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.
Figure 5—FG-30B/FG-36B/FG-40 Carburetor
Counter-clockwise direction
(for rich mixture)
Clockwise direction
(for lean mixture)
Clockwise direction
(for lean mixture)
Counter-clockwise direction
(for rich mixture)
High-Speed Needle Valve
Low-Speed Needle Valve
Ball-joint for linkage
Throttle lever
NOTICE:
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.
