Exploded View

1. Fuel
●The fuel is mixture of commercial regular gasoline and reliable oil for 2-stroke engines.
●[Example of oil recommendation]
・ Klotz KL-200 Original Techniplate ・ Morgans Cool Power 'Blue' Synthetic Lubricant etc.
●Be sure to use the mixture gasoline : oil =1520 : 1 by volume ratio. (Ex. 1000ml of gasoline should be
mixed with more than 50ml of oil ).
●In Break-in process, please use 15:1 mixed fuel to ensure the best lubrication for initial run.
●Any damage caused by the fuel used, in which the oil ratio is lower than 20:1 ratio, is not warranted.
●Do not use gasoline ethanol mixed. It may cause not only power loss but also corrosion inside the engine.
Note:
●As it uses oil mixed fuel, plane sometimes may get dirty by exhaust.
●Use reliable and well balanced prop, otherwise it cause abnormal vibration and may result in serious acci-
dent.
●During operation, the screws all over the engine can be loosen by heat expansion of metal. Tighten them up
occasionally.
●When the exhaust valve gets dull by carbon or sludge especially in cold atmosphere, remove the rocker
cover and apply some anti-rust spray to the exhaust valve to help the valve to move smoothly.
●All responsibilities for the use of the engine, and other obligations and responsibilities based on laws, regula-
tions, etc. are borne by the purchaser and the user, and SAITO SEISAKUSHO CO., LTD. is exempt from any
responsibilities.
Warranty:
●If there is any deficiency from the factory concerning manufacture, please consult the shop or distributor you
bought from, so that our company will repair them with responsibility. Any failure or trouble caused by
unnecessary disassembly, modification, or other uses than those provided in the instruction manual is not
subject to the warranty.
22.4mm x 3 16.2mm x 3 19.18cc
APC D13 x P9 D15 x P6
1/4-32 SP-1 spark plug
・Filter with weight [G36-154] ・Rubber tube for gasoline(1m) [G36-155]
・Aluminum spinner nut [50-30]・Tappet adjusting kit [30-161] ・Digital tachometer [G17-167]
Bore
Body: 950g / Mufflers: 60g / Ignition system: 195g
Stroke Disp.
Weight (Approx.)
Practical speed Approx.:1,800-10,000rpm Max on GND Approx.:9,000-10,000rpm
Propeller
Plug
Optional parts
Standard
accessories
Glow 2st 60/ 4st 90 classApplications
Battery for ignition system
6-9V higher than 1,000mA
(2C Lipo or 5C NiMH)
・Limit gauge (0.1t) for tappet adjustment 1pc ・Plug wrench 1pc
・Spanner for tappet adjusting lock nut 1pc ・Hexagonal wrench 1.5mm 1pc
・Spark plug [SP-1](Attached to the engine) 3pcs ・Muffler set 1set
・Ignition system（w/ sensor） 1set
Specifications:
FG-19R3 Instruction Manual
FG-19R3 Instruction Manual
3. Needle reference position (Set After Break-in)
●Main needle：Applox. 1 turn open from full close
●Slow needle：Approx. 6 turns open from full close (Then
throttle should be fully closed)
●Actually the best condition of the needles varies depend-
ing on the prop, temperature, humidity and so on. Please
adjust seeing the engine performance during flight.
CW→Lean
CCW→Rich
CW→Lean
CCW→Rich
CCW→Rich
CC→Lean
Main needle
Slow (Idle) Needle
(Adjust with ⊖ screw driver)
Slow
High
Throttle lever
3. Break-in MOST IMPORTANT!!
●Prop-recommendation : APC-14x6 for Break-in.
●Use 15:1 oil mixed fuel for Break-in.
●Never make the fuel mixture lean during Break-in. It could cause seizure even during idling or low speed
running.
●Before start the engine, open the main needle Approx. 1+1/2 turns open
from full close.
●Start the engine with a starter.
●Run for about 10 seconds in low speed to warm up.
●Open throttle gradually up to full, in the meantime open the main needle
some turns until just before engine stops. Make sure to keep full throttle!
●Run in this very rich condition for 2 tanks.
Throttle
Full open
CCW to make
rich
Main
Needle
4. Tappet adjustment
The valve clearance should be checked and adjusted after Break-in and every after 2 hours while the
engine is cold. Please tighten up the screws holding cylinders etc, before adjustment.
1. Remove the spark plug and rocker
arm covers of Cylinder #1. Then
turn the prop CCW by hand to
place the piston at TDC of com-
pression stroke.
2. Loosen the lock nut and adjust
the gap by hexagonal wrench until
you get the correct gap (Right pic)
for both of intake & exhaust.
3. Once the gap is set, tighten the
lock nut and attach the plug and
covers. Then do the same adjust-
ment for #3-#2 cylinder in order.
4. Turn the prop by hand to check if the
compression is enough. If the gap is less
than 0, the valve is always opened sightly
and lose compression. Then adjust again.
Correct Gap
Must not be inserted
Close to 0 with no limit
Limit gauge
(0.1mm)
Cut out
Fuel tank
Fuel level
To Outside
Air inhalation pipe
To Carb nipple
Fuel feeding pipe
Firewall
Air inhalation
pipe
Rubber cap for
gasoline-resistant
Gasoline-proof tube
Filter with weight
Center of fuel tank
Set the center of the carb
slightly upper than fuel level
Close as possible
Plug cap
Switch (not included)
Capacity: more than 3A
Sensor
(2)Sensor cord
(1)Plug cord
Main unit
(3)Battery cord
(4)Tachometer cord
Recommended battery
5cell-NiMH or 2cell-Lipo
Voltage: 6-9V
Capacity: 1000mA
●Ignition arrangement. - Place the main unit as far from other electrical devices as possible.
(1) Plug cord (meshed high tension cord)
Insert the plug cap from ① cord deeply into the plug of #1 cylinder. Connect other caps and plugs
in the same way.
(2) Sensor cord (Gray cord with exclusive connector)
Connect with the cord from the sensor attached to the engine.
(3) Battery cord (black/red cord)
Use a fully charged battery that has adequate spec. (6-9V, more than 1000mA is recommended.).
Between the battery and main unit, make sure to set a heavy duty switch whose capacity is higher
than 3A.
(4)Tachometer cord (black/red/white cord)
Connect the digital tachometer (Option). Otherwise the connector is normally vacant.
#1
#2
#3
Firing order
Prop direction
Firing order
#1-#3-#2
From the Pilots view
2. Ignition
SAITO SEISAKUSHO, CO., LTD.
www.saito-mfg.com
22-7, 3-chome, Tokagi, Ichikawa-shi, Chiba prefecture 272-0024, Japan Phone: [phone] FAX: [phone]
FG-19R3 Instruction Manual
All specifications and models are subject to change without notice.