Saito FA-30S (H) User manual

    
INSTRUCTION MANUAL
Version 2006
. FA-30S (H)
. FA-30S Golden Knight
. FA-40a
. FA-40a Golden Knight
. FA-50
. FA-50 Golden Knight
. FA-56
. FA-56 Golden Knight
. FA-62a
. FA-62a Golden Knight
. FA-65
. FA-65 Golden Knight
. FA-72
. FA-72 Golden Knight
. FA-80
. FA-80 Golden Knight
. FA-82a
. FA-82a Golden Knight
. FA-91 Special
. FA-91S Golden Knight
. FA-100
. FA-100 Golden Knight
. FA-125a
. FA-125a Golden Knight

VERY
IMPORTANT
Failure to read
and follow these
instructions before
you proceed to
start your engine
may result in
engine damage
and the voiding of
your warranty.

1
SAFETY INSTRUCTIONS
Introduction
Safety Instructions
You should always:
Congratulations on purchasing a Saito
4-cycle engine. When cared for
properly ,these high-quality, finely
crafted engines offer many years of
modeling enjoyment.
This instruction manual has been
developed to ensure optimum
performance from the Saito engine you
have purchased. The instructions must
be read through completely and
understood thoroughly prior to
mounting and running the engine.
This model engine will give you
considerable pleasure, satisfaction, and
performance if you strictly follow
these safety instructions and take heed
of the warnings as to its safe and
proper use. Remember at all times
it is not a toy, but a precision-built
machine with more than enough power
to cause harm if misused or if the
safety precautions are not observed.
3. Use the correct size and pitch
of propeller for your engine, refer
to the "Propeller Chart" on page 16 of
this manual.
4. It is extremely important to balance
the propeller prior to installation of the
engine. Failure to do so may cause
damage to the Saito engine and/or the
airframe. Install the propeller with the
convex (curved) side facing forward.
Securely tighten the propeller out
against the washer and propeller. An
anti-loosening nut (or “jarn” nut) is
suggested for all 4-cycle engines.
5. Inspect the lightness of the propeller
nut prior to each flight.
6. Keep your face and body away
from the path of the propeller blades
when starting or running your engine.
7. Never allow your hands to come
close to the propeller. Utilize either
a “Start Stick” or electric starter to
start the engine.
8. Discard any propeller that is nicked,
scratched, cracked or damaged in any
way.
9. Make all carburetor adjustments
from behind the propeller.
10. To stop the engine, cut off the fuel
supply (pinch or disconnect the fuel
line to the carburetor) or use the
throttle linkage to shut off the air.
1. Mount the engine securely in a
“bench mount” or high-quality motor
mount. Never clamp the engine in
a vice.
2. When running the engine, be sure
all spectators, especially children, are
at least 20 feet away.

2SAFETY INSTRUCTIONS
Do not use hands, fingers, or any other
part of the body to stop the propeller.
Do not throw any object into a
propeller to stop it.
.Safety glasses or goggles be
used when starting and running
your engine.
.You do not run the engine in the
vicinity of loose gravel or sand.
The propeller may throw such
materials into your face and eyes.
The engine may also ingest these
harmful materials.
.Loose clothing should be avoided
when operating your model engine.
Loose clothing may become
entangled in the propeller, creating
the possibility of bodily harm. Also,
all loose objects (screwdrivers,
pencils, nickle cadmium starters, etc.)
should be removed from your
pockets so that they do not fall
into the propeller.
.Glow plug clips and cords are kept
away from the propeller.
.Your glow fuel is kept in a safe place
well away from sparks, heat, or
anything that can ignite the fuel.
It is highly recommended that:
.Model engines get very hot while
running. Do not attempt to handle
them until they have cooled.
.Always run your model engines in a
well-ventilated area. Similar to
automotive engines, model engines
produce possible harmful carbon
monoxide fumes.
.Remember that model engines
produce a substantial amount of
power, more than enough to seriously
injure people and/or do considerable
damage to property. Always use
common sense, skill and constant
observation of safety precautions.
Beware:
Disassembly
Do not needlessly disassemble your
Saito engine. Only qualified
individuals should perform engine
repairs. Damage due to improper
disassembly will not be covered under
warranty. If it becomes necessary to
repair the engine, such as after a crash,
you can send your engine to the
authorized service center at.
Horizon Hobby, Inc.
Attention: Saito Service
4105 Fieldstone Road
Champaign, IL 61822
Phone: [phone]

3
SUPPORT EQUIPMENT
Engine Parts
Identification
Support Equipment
It is important to be able to identify the
parts of your Saito engines. Attached
you will find an expioded view of a
Saito 4-stroke engine, as well as charts
that include part numbers and
descriptions. This will assist you in
easily and rapidly identifying the
respective parts of your Saito engine.
The following items, which are not included
with your Saito engine, are necessary in
order to operate the model engine:
1. Fuel. For maximum protection and
loogevity of Saito engines, Saito
recommends a fuel containing 20% oil
and 10-15% nitro methane. If this blend is
not readily available, the next best
selection is a high quality 2-cycle glow
fuel, such as Hangar 9 Aero-Blend,
Omega, Cool Power, K&B, Power
Master, etc. Use of fuels composed
entirely of castor oil is not recommended.
A mix of synthetic-castor oil is acceptable
and can be found in the various fuels
described above.
4. Glow Plug Wrench. Used to
remove and tighten glow plugs. The
Hangar 9 Long Reach Plug Wrench
(HAN2510) is an excellent wrench to
utilize, as a longer shaft may be necessary
to access the glow plug. This depends
mostly upon engine installation.
5. Manual or Electric Starter. For
manual starts, a “Start Stick” is
highly recommended. Never use
your fingers to start any model engine.
To do so invites injury. There are a
variety of electric starters on the
market. The Hangar 9 (tm) Power Pro
Heavy Duty12V Starter (HAN162) will
work perfectly on all Saito engines.
6. Tachometer. The use of a
tachometer for setting the high-speed
needle valve prior to flight is
encouraged. It will also be helpful
when setting the idle adjustment of the
carburetor(s).The Hangar 9 (tm) Micro
Digital Tachometer (HAN156) is a
good choice.
2. Propeller. Refer to the "Propeller
Selection" chart, located on page 16, to
determine the best initial propeller for
your particular application. Propellers
should be balanced prior to use.
3. Glow Plug Battery. Your glow
plug may be properly beated by
several different sources. The Hangar 9
Power Panel (HAN106), when
accompanied by a 12-volt Sealed Lead
Acid Battery (HAN102) and a Glow
Plug Locking Socket (HAN120) is an
ideal source of heat for your glow
plug. A conventional 1.5-volt heavy-
duty dry cell battery with a Grow Plug
Locking Socket (HAN120) or alligator
clips may also be used. Additionally,
there are several very good glow-
starters (nickel cadmium-powered
glow plug igniters) that work well.

4STARTING THE ENGINE
Break-In
The first run on any engine, whether
2-cycle or 4-cycle, is critical to the
future of the engine itself. During this
time, metal mating parts (piston and
cylinder, ball bearings, etc.) wear in.
Care must be taken that the engine is
clean and free of any dust or grit that
may have accumulated while building
the model.
There are two accepted methods for
breaking in a new engine: test stand
mounted and run or aircraft mounted
and run. Either method is acceptable:
however, mounting the engine to a test
stand allows the engine to be observed
throughout its operation, as well as
elevating it above the ground and away
from harmful dust and dirt.
Regardless of the mounting methed
chosen for break-in, the following
procedures are applicable:
Note: Because your engine may have
been sitting for an extended period of
time prior to running it, a few drops of
light oil applied through the crankcase
breather nipple (19 on the exploded
view) and down the push-rod tubes
(40) will ensure proper lubrication for
the first run.
1. Use of a fuel as described in the
“Support Equipment” section on
page 3 of this manual for “break-in”
purposes is perfectly acceptable.
2. Your engine includes the Saito SS
SAIP 400S glow plug. The Hangar 9
(tm) Four Cycle Super Plug (HAN3011)
is a standard replacement to use in
these engines.
3. To select the correct propeller, refer
to the "Propeller Selection" chart on
page 16 of this manual. Remember to
balance the propeller prior ot use.
4a. For all .30 to .91 engines, ensure
that the high speed needle valve (85) is
opened (turned counter-clockwise) two
and 1/2 turns out. This guarantees a
very rich setting.
4b. For all 1.00 to 1.25 engines, ensure
that the high speed needle valve (85) is
opened (turned counter-clockwise) 5
turns out. This guarantees a very rich
setting.
5. The use of a tachometer is highly
recommended since the adjustment of
a 4-cycle engine, while similar to that
of a 2-cycle engine, is more difficult to
“set by ear,” making it much easier to
damage the engine by “over-leaning.”
Do not adjust the low-speed needle
valve (89) at this time. The low-speed
needle valve is preadjusted at the
factory for initial break-in. Specific
instructions for adjusting the idle
of engines (FA-30S(H)) using an
“air-bleed” type carburetor will be
described in the section “Carburetor
Adjustments forAir Bleed
Carburetors” on page 7.

5
STARTING THE ENGINE
Starting The Engine
1. Make sure the glow plug(s) is/are
installed and tightened.
2. Be sure the propeller is properly
secured. The use of an anti-loosening
nut, or “jam nut,” is encouraged on
4-cycle engines.
Note: Saito single cylinder engines
are now manufactured without the
choke valve (92). Due to the excellent
fuel draw characteristics of the Saito
engines, the use of the choke was
determined not to be necessary.
Note: When using an electric starter,
care should be taken to be sure the
engine does not become “hydro-
locked” (flooded with fuel). While the
electric starter will turn the engine
over, it may damage the connecting
rod or other components. If the engine
becomes hydro-locked, simply remove
the glow plug and turn the engine over
a few times with the “Start Stick” or
electric starter. The excess fuel will be
forced to exit the engine via the
cylinder head.
3. Make sure that the fuel tank line(s)
are properly connected. The fuel
pickup line should be connected to the
carburetor spray bar (84), and the vent
line should be connected to the
pressure nipple on the muffler. The
proper “plumbing” of the lines is
extremely important to the
performance of any engine. Saito
recommends the center of the tank
be mounted approximately 5 mm
lower than the carburetor center.
7. Start the engine:
4. Be certain that the muffler is
installed properly by oiling the threads
prior to inserting the muffler into the
cylinder head and that the pressure line
is properly connected.
5. Fill the fuel tank.
6. Prime the engine:
.Check to make sure the glow plug is
not connected to the heat source
(glow plug clip/locking socket)
.Open the throttle fully
.Rotate the propeller in a counter-
clockwise direction 5 to 6 times
while plugging the end of the muffler
with your finger to draw fuel into
the carburetor.
.Turn through the prop 2 to 3 times
slowly to ensure that the engine is
not hydro-locked (see note below).
.Colse throttle to 1/4
- 1/3
open position.
.Rotate propeller clockwise until it is
against the compression stroke.

6STARTING THE ENGINE
Carburetor
Adjustments for Two
Needle Carburetors
Note: A very common error is to
remove the glow plug ingiter too early.
It is suggested that the igniter be left
attached until after the engine has been
run up and the high-speed needle valve
has been properly adjusted.
Note: Due to the excessively “rich”
mixture setting, it may be necessary to
leave the heat source attached to the
glow plug.
1. Start the engine and let it warm up
prior to attempting any adjustments.
9. After break-in:
Do not exceed 4,000 rpm for the first
10 minutes of operation: This allows
all parts to mate properly with good
lubrication.
The idle needle valve (89) (or air bleed
needle valve) for the Saito .30S(H)/
GK engines) may now be refined.
Please refer to the "Carburetor
Adjustments" section on page 6 for
information on how to do so.
The valves may also be checked at this
time. Refer to the "Engine
Maintenance" section on page 8 for
information on the valve/tappet
adjustments.
The use of a tachometer is encouraged
for setting the high-speed needle valve
(85) prior to flight. The peak rpm
should be obtained and then reduced
by approximately 200 _ 300 rpm by
turning the high-speed needle valve
counter-clockwise (richen). Each
engine’s peak rpm can be found on the
"Propeller Chart" on page 16. Over-
revving of a 4-stroke engine can cause
internal damage to the engine.
The low-speed, or idle needle valve
(89), is preadjusted at the factory for
best performance during break-in.
After break-in it may be necessary to
“fine tune” the low speed adjustment
using the following procedure:
Subsequent runs may be made while
slightly leaning out the mixture with
each tank full of fuel. Forty minutes is
considered sufficient time for normal
break-in prior to the first flight.
If a test stand was used for the break-in
procedure, the engine may now be
mounted in the aircraft using a high-
quality motor mount such as those
available from Saito specifically or for
Saito engines.
8. Initial break-in:
.Connect the heating source to the
glow plug.
.Using either the “Start Stick” or
electric starter, spin the propeller until
the engine is running.

7
CARBURETOR ADJUSTMENTS
Carburetor
Adjustments for Air
Bleed Carburetors
The fuel mixture may be too lean if the
engine stops at the lowest idle position,
or when the throttle is rapidly opened
from idle. Attempt to correct this by
rotating the idle needle valve counter-
clockwise 1/4 to 1/2turn at a time until
the engine transitions smoothly without
hesitation upon opening the throttle
rapidly. If the situation is not rectified
by counterclockwise rotations of the
idle needle valve, turn the idle
needle valve clockwise in 1/4 to 1/2
turn increments.
Note: The fuel mixture is too irch if
when openning the throttle rapidly the
engine emits white smoke and
“stutters” or “stumbles.” Correct this
by rotating the idle needle valve
clockwise 1/4 to 1/2trun at a time
until the engine transitions smoothly
without hesitation upon opening the
throttle rapidly.
Note: The Saito FA-30S(H) and
FA-30SGK use an air bleed carburetor.
Note: The fuel mixture is too rich if
when openning the throttle rapidly the
engine emits white smoke and
“stutters” or “stumbles.” Correct this
by rotating the airscrew counter-
clockwise 1/4 to 1/2turn at a time until
the engine transitions smoothly without
hesitation upon opening the throttle
rapidly.
3. After obtaining the proper idle
setting, the low rpm setting may be
made through the positioning of the
throttle adjustment screw, if applicable.
If not, adjust the idle setting via the
throttle trim of your transmitter.
2. Close the throttle slowly and adjust
the low speed setting by rotating the
idle needle valve (89) clockwise to
lean the mixture and counterclockwise
to richen the mixture.
1. Start the engine and let it warm up
prior to attempting any adjustments.
2. Close the throttle slowly and adjust
the airscrew setting by rotating the
airscrew (89) counterclockwise to lean
the mixture and clockwise to richen the
mixture.
The fuel mixture may be too lean if the
engine stops at the lowest idle position
or if the engine stops when the throttle
is rapidly opened from idle. Attempt to
correct this by rotating the airscrew
clockwise 1/4 to 1/2turn at a time until
the engine transitions smoothly without
hesitatiionupon opening the throttle
rapidly. If the situation is not rectified
by clockwise rotations of the airscrew,
turn the airscrew counter-clockwise in
1/4 to 1/2turn increments.

8NORMAL ENGINE OPERATION
Normal Engine
Operation
Engine Maintenance
If break-in was accomplished on a test
bench your engine may be mounted to
the aircraft and flown. The initial flight
should be performed with the engine
adjusted for a rich fuel mixture.
If you must disassemble your single
cylinder engine, please refer to the
following steps. Remember, a qualified
individual should do disassembly.
3. After obtaining the proper idle
setting, the low rpm setting may be
made through the positioning of the
throttle adjustment screw, if applicable.
If not, adjust the idle setting via the
throttle trim of your transmitter.
1. Your Saito engine should be
securely mounted to the aircraft. There
are many motor mounts available;
however, a high-quality metal mount,
such as those manufactured by Saito
exclusively for Saito engines, is
considered to be the best.
2. General operating procedures that
will ensure long engine life are:
1. Cylinder screws should be loosened
in a criss-cross pattern.
2. Assemble the cam gear lining up the
timing mark at the “6 o'clock”
position. The crankshaft must be
positioned at the “12 o'clock” or
“top dead center” (TDC) position
(refer to Figure 1 below).
Do not needlessly dismantle your
Saito single cylinder engine.
.Do not operate the engine with a
“lean” mixture.
.Regularly check all screws and nuts
on both the engine and muffler.
.After 1 to 2 hours of operation, valve
adjustment may be necessary. Adjust
the valves as shown in the"Valve/Tappet
Gap Adjustment" section on Page 9.
.The Saito engines are equipped with
a breather nipple (19). It is
recommended that a length of
silicone tubing be attached to this
crankcase breather nipple (19) and
routed away from the engine
compartment so the excess oil can be
expelled outside of the aircraft.
Figure 1
Cam (Intake or Exhaust)
Bench Mark

9
ENGINE OPERATION
Valve/Tappet Gap
Adjustment
After approximately one hour of
operation, tappet gap adjustment may
be necessary. When you check the
valves, lubricate the moveable parts.
Also make sure the screw is in tight
before making adjustments to valves.
Adjust the valves to a clearance of
.03 mm to .10 min (.002" _ .004")
using the supplied gauge. The valves
must be adjusted with the engine cold
due to thermal expansion.
3. Reassemble the piston, rod, rocker
arm, pins, pushrod, tappet, etc., in their
original positions. Engine parts are
mated after running the engine and
they must be reassembled as close as
possible to their original position.
4. Assemble the engine, reversing the
criss-cross pattern used in the
disassembly. Prior to tightening each
of the screws, apply a drop of oil to
prevent thread damage.
Note: Valves must be in the
compression stroke or closed position
as shown in Figure 2 below. When
adjustment is completed, make sure
you tighten the lock nut.
Normal engine maintenance, such as
adjusting the valves or carburetor
maintenance, is permissible without
voiding the warranty. If you have
any questions concerning
maintenance procedures, please
contact the Saito Service Center at
[phone]. Our technicians will
be happy to advise you on
maintenance issues. Figure 2
Tappet Adjustment
Screw
Adjust between
Gauge
(0.1 mm Max )
0.03 _0.10 mm (.002" _.004")

10 CARBURETOR MAINTENANCE
Carburetor
Maintenance
Should you experience difficulty with
the carburetor of your engine:
1. Check that the slotted head of the
Idle Needle Valve (89) is flush with
the throttle arm housing. This will
put the idle needle back to the factory
preadjusted position.
2. Remove the high-speed needle
(85) and flush out the spray bar with
clean fuel. Replace the high-speed
needle and follow the instructions in
the Carburetor Adjustment section.
3. Always use a high-
quality 4-cycle glow plug.
Saito SS (SAIP 400S) or Hangar 9
(tm) Four-cycle Super Plug
(HAN3011) is highly recommended.
Tips For Extended
Engine Life
To add longer life to your Saito
engine, the following
recommendations are made:
1. Use a high-quality fuel containing
20% lubricauts.
3. Use the proper propeller size and
balance the propeller prior to use.
4. Use a tachometer for precise
engine adjustments.
5. Use an “after-run” oil when you’re
finished flying for the day. Hangar 9
After Run fuel is recommended.
6. For long-term storage, make sure
there is no fuel left in the tank and the
engine. Remove the glow plug(s) and
apply several drops of high-quality
light oil (e.g., a good quality light
machine oil or Marvel Air Tool Oil)
to the top of the engine, into the glow
plug hole, down the pushrod tubes,
and through the crankcase pressure
vent (breather nipple). Rotate the
crankshaft several times. Store the
engine in the box or on the airplane
with the nose down in order to keep
oil in the bearings.
2. Use recommended glow plugs.

11
TROUBLESHOOTING
Troubleshooting
Generally speaking, there are very
few things that will keep today's
modern glow engines from starting.
To that end, make sure you're using
good quality “fresh” fuel, there are
good glow plugs installed, and the
starting battery is charged and in good
condition. Should the engine fail to
start after these items are verified,
refer to the following troubleshooting
chart on page 12.

12 TROUBLESHOOTING
SYMPTOM CAUSE CORRECTIVE ACTION
In the event that none of the above procedures results in the engine running
properly, contact our service department for suggestions:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
217-355-9511 (Mon-Fri 8:00-5:00 CST)
Engine fails to
start
Engine fires but
does not run
Engine starts but
slows down and
then stops
Engine quits
when starter
battery is
removed
Engine starts,
speeds up, and
then quits
Low voltage on
starting battery
Bad glow plug(s)
Insufficient priming
“Flooded” due to
excessive priming
Over primed
Mixture too rich
Mixture too rich
Incorrect glow plugs
Incorrect or bad fuel
Mixture too lean
Replace/recharge the
starting battery
Inspect/replace bad glow plug
Repeat priming procedure
Disconnect battery, remove the
glow plugs, and rotate the
propeller several times to
“clear” the cylinder
Disconnect battery and rotate
propeller several times to
“clear” cylinder
Close high-speed needle valve
1/2
turn and start again. Repeat
until engine is running smoothly.
Close high-speed needle valve
1/2
turn and restart
Change glow plugs
Chauge fuel
Open high-speed needle valve
1/2
turn and start again. Repeat
until engine is running smoothly.

13
PARTS LIST
Small Single-Cylinder Cross-Reference Chart
Figure 4A
PART Nil
FA-305-GK
01 Cylinder, Left
06 Piston
07 Piston Pin
08 Piston Pin Retainer(6 Pc)
09 Piston Ring
10 Connecting Rod
14 Cylinder Screw Set
15 Crankcase
17 Rear Cover (A)
19 Breather Nipple
20 Front Ball Bearing
22 Rear Ball Bearing
23 Crankshaft
24 Pinion-Crankhshaft
25 Pinion Gear-Pin
26 Collar, Crankshaft
27 Taper Collet & Drive Flange
28 Prop Washet & Nut
29 Prop Nut, Spinnet
30 Prop Nut, Electric Starter
31 Crankcase Screw Set
32 Engine Gasket Set
33 Cam Gear Housing
35 Cam Gear, Right
36 Cam Gear Shaft
37 Teflon/Steel Washer Set
38 Tappet (2Pc)
39 Pushrod (2Pc)
40 Pushrod Cover Rubber Seal (Pr)
41 Rocker Arm (Pr)
42 Rocker Arm Screw Nut (2 Sets)
43 Rocker Arm Pin (2Pc)
44 Rocker Arm Bracket, Left
45 Rocker Arm Bracket, Right
46 Valve-In/Out (Pr)
47 Valve Spring, Keeper, Retainer (2 Sets)
48 Valve Retainer (4Pc)
49 Rocket Arm Cover (Pr)
68 Check Valve-In/Out (Pr)
69 Intake Manifold, Left
74 Muffler, Right
75 Muffler Manifold, Standard
79 Muffler Gasket 8 (5 Pc)
80 Muffler Nut (2 Pc)
821 Carburetor-Complete, Left
822 Carburetor-Complete, Right
831 Carburetor Body Assembly, Left
84 Spray Bar Assembly
85 High Speed Needle Valve
86 High Speed Needle Valve Extension
87 Throttle Barrel Assembly
88 Throttle Lever
89 Idle Needle Valve
90 Carbutetor Screw & Spring Set
91 Carburetor Gasket Set
92 Choke Valve Assembly
93 Intake Veloclty Stack
95 Engine Mount
96 Tool Set
97 Instruction Manual
102 Fuel Pump System
109 F-1 Fuel Filter
110 Anti-Loosening Nut
111 Flexible Exhaust Pipe
112 Tuned Sllencer
114 Engine Bed
116 M3 Nut for Spinner
117 M4 Nut for Spinner
118 M5 Nut for Spinner
122
Spray bar with internal p-2/External p-5"0"ring
135 Prop Washer/Nut/Anti-loosening Nut
136 Intake Manifold
137 Prop Washer
145 Spray bar with internal p-2"O"ring
151 Muffler Nut
30S01
30S06
30S07
30S08
60T09
30S10A
5014
30S15
30S17
30S19
30S20A
30S22
30S23
30S24
5025
–
30S27
30S28
–
30S30
30S31
30S32A
30S33
30S35
30S36
30S37
30S38
30S39
30S40
60T41
5042
30S43
–
–
30S46
30S47
5048
30SGK49
–
–
30S74
30S75
–
30S80
30S821
–
30S831
30S84
30S85
–
30S87
30S88
30A89
30S90
30S91
–
–
30S95
30S96
MAN1
–
50109
–
–
–
–
–
–
–
–
–
–
–
–
–
MM
FA-30S(H)
30SH01
30S06
30S07
30S08
60T09
30S10A
5014
30SH15
30SH17
30S19
30S20A
30S22
30S23
30S24
5025
–
30S27
30S28
–
30S30
30S31
30S32A
30SH33
30S35
30S36
30S37
30S38
30S39
30S40
60T41
5042
30S43
–
–
30S46
30S47
5048
30SH49
–
–
30S74
30S75
–
30S80
30S821
–
30S831
30S84
30S85
–
30S87
30S88
30S89
30S90
30S91
–
–
30S95
30S96
MAN1
–
50109
–
–
–
–
–
–
–
–
–
–
–
–
–
WW
FA40a
40a01
40a06
40a07
5008
40a09
40a10
5014
40a15
40a17
30S19
30S20A
40a22
40a23
–
–
–
40a27
40a28
–
30S30
40a31
40a32
40a33
30S35
90R336A
30S37
30S38
40a39
40a40
60T41
5042
30S43
–
–
30S46
30S47
5048
30SH49
–
–
40a74
40a75
40a79
40a80
40a821
–
40a831
40a84
40a85
–
40a87
40a88
40a89
40a90
40a91
–
–
40a95
30S96
MAN1
–
50109
40a110
–
–
–
–
–
–
–
40a135
–
–
–
–
XX
FA-40aGK
40aGK01
40a06
40a07
5008
40a09
40a10
5014
40aGK15
40aGK17
30S19
30S20A
40a22
40a23
–
–
–
40a27
40a28
–
30S30
40a31
40a32
40aGK33
30S35
90R336A
30S37
30S38
40a39
40a40
60T41
5042
30S43
–
–
30S46
30S47
5048
30SGK49
–
–
40a74
40a75
40a79
40a80
40a821
–
40a831
40a84
40a85
–
40a87
40a88
40a89
40a90
40a91
–
–
40a95
30S96
MAN1
–
50109
40a110
–
–
–
–
–
–
–
40a135
–
–
–
–
E
FA-50
5001B
5006
5007
5008
5009
5010A
6014
5015C
5017B
5019
5020A
5022A
5623A
5024
5025
5026
5027
5628
–
5030A
5031
5032B
5033A
5035
5036A
5037
5038
5039
5040
5041
5042
5043
–
–
5046
5047
5048
5049A
–
5069
5074D
5075C
–
5080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
5091B
5092
–
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
–
–
65122A
56135
–
–
–
–
F
FA-50GK
50GK01B
5006
5007
5008
5009
5010A
5014
50GK15C
50GK17B
5019
5020A
5022A
5623A
5024
5025
5026
5027
5628
–
5030A
5031
5032B
50GK33A
5035
5036A
5037
5038
5039
5040
5041
5042
5043
–
–
5046
5047
5048
50GK49
–
5069
5074D
5075C
–
5080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
5091B
5092
50GK93
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
–
–
65122A
556135
–
–
–
–
U
FA-56
5601B
5606
6507
6508
6509
5610
5014
5615B
5017B
5019
5020A
5022A
5623A
5024
5025
5026
5027
5628
–
5030A
5031
5632B
5033A
5035
5036A
5037
5038
5039
5040
5041
5042
5043
–
–
5646
5047
5048
5049A
–
5669A
5074D
5075C
–
5089A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
5691B
5092
–
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
–
–
65122A
56135
–
–
–
–
JJ
FA-56GK
56GK01B
5606
6507
6508
6509
5610
5014
56GK15B
50GK17B
5019
5020A
5022A
5623A
5024
5025
5026
5027
5628
–
5030A
5031
5632B
50GK33A
5035
5036A
5037
5038
5039
5040
5041
5042
5043
–
–
5646
5047
5048
50GK49
–
5669A
5074D
5075C
–
5080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
5691B
5092
50GK93
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
–
–
65122A
56135
–
–
–
–

14 PARTS LIST
Medium Single-Cylinder Cross-Reference Chart
Figure 4B
PART AI
FA-62a
01 Cylinder, Left
06 Piston
07 Piston Pin
08 Piston Pin Retainer (6 Pc)
09 Piston Ring
10 Connecting Rod
14 Cylinder Screw Set
15 Crankcase
17 Rear Cover (A)
19 Breather Nipple
20 Front Ball Bearing
22 Rear Ball Bearing
23 Crankshaft
24 Pinion-Crankhshaft
25 Pinion Gear-Pin
26 Collar, Crankshaft
27 Tapered Collet & Drive Flange
28 Prop Washet & Nut
29 Prop Nut, Spinnet
30 Prop Nut, Electric Starter
31 Crankcase Screw Set
32 Engine Gasket Set
33 Cam Gear Housing
35 Cam Gear, Right
36 Cam Gear Shaft
37 Teflon/Steel Washer Set
38 Tappet (2Pc)
39 Pushrod (2Pc)
40 Pushrod Cover Rubber Seal (Pr)
41 Rocker Arm (Pr)
42 Rocker Arm Screw Nut (2 Sets)
43 Rocker Arm Pin (2Pc)
44 Rocker Arm Bracket, Left
45 Rocker Arm Bracket, Right
46 Valve-In/Out (Pr)
47 Valve Spring, Keeper, Retainer (2 Sets)
48 Valve Retainer (4Pc)
49 Rocket Arm Cover (Pr)
68 Check Valve-In/Out (Pr)
69 Intake Manifold, Left
74 Muffler, Right
75 Muffler Manifold, Standard
79 Muffler Gasket 8 (5 Pc)
80 Muffler Nut (2 Pc)
821 Carburetor-Complete, Left
822 Carburetor-Complete, Right
831 Carburetor Body Assembly, Left
84 Spray Bar Assembly
85 High Speed Needle Valve
86 High Speed Needle Valve Extension
87 Throttle Barrel Assembly
88 Throttle Lever
89 Idle Needle Valve
90 Carbutetor Screw & Spring Set
91 Carburetor Gasket Set
92 Chode Valve Assembly
93 Intake Veloclty Stack
95 Engine Mount
96 Tool Set
97 Instruction Manual
102 Fuel Pump System
109 F-1 Fuel Filter
110 Anti-Loosening Nut
111 Flexible Exhaust Pipe
112 Tuned Sllencer
114 Engine Bed
116 M3 Nut for Spinner
117 M4 Nut for Spinner
118 M5 Nut for Spinner
122
Spray bar with internal p-2/External p-5"0"ring
135 Prop Washer/Nut/Anti-loosening Nut
136 Intake Manifold
137 Prop Washer
145 Spray bar with internal p-2"O"ring
151 Muffler Nut
62a01
62a06
62a07
8008A
62a09
62a10
5014
62a15
5017
6519
5020A
6522A
62a23B
–
–
–
62a27
5628
–
5030A
5031
62a32
62a33
6535A
62a36
5037
5038
5039
62a40
5041
5042
5043
–
–
62a46
6547
5048
5049A
–
62a69
62a74
5075C
–
5080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
6591B
5092
–
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
65117
65118
65122A
56135
–
–
–
–
AJ
FA-62aGK
62aGK01
6206
62a07
8008A
62a09
62a10
5014
62aGK15
50GK17B
6519
5020A
6522A
62a23
–
–
–
62a27
5628
–
5030A
5031
62a32
62aGK33
6535A
62a36
5037
5038
5039
62a40
5041
5042
5043
–
–
62a46
6547
5048
50GK49
–
62a69
62a74
5075C
–
5080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
6591B
5092
5093
5095
6596A
MAN1
–
50109
56110
–
–
–
50116
65117
65118
65122A
56135
–
–
–
–
G
FA-65
6501C
6506A
6507
6508
6509
6510C
6514
6515A
6517A
6519
6520A
6522A
6523B
–
–
–
6527
5628
–
5030A
5031
6532B
6533B
6535A
5036A
5037
5038
6539
6540
5041
5042
5043
–
–
6546
6547
5048
5049A
–
6569
6574D
8075C
–
8080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
6591B
5092
–
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
50116
65117
65118
65122A
56135
–
–
–
–
H
FA-65GK
65GK01C
6505A
6507
6508
6509
6510C
6514
65GK15A
80GK17A
6519
6520A
6522A
6523B
–
–
–
6527
5628
–
5030A
5031
6532B
65GK33B
6535A
5036A
5037
5038
6539
6540
5041
5042
5043
–
–
6546
6547
5048
50GK49
–
6569
6574D
8075C
–
8080A
50821C
–
50831A
–
10085
5086
5087A
5088B
5089
5090A
6591B
5092
50GK93
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
50116
65117
65118
65122A
56135
–
–
–
–
RR
FA-72
8001C
8006B
91S07
8008A
8009
7210A
6514
7215
7217A
6519
6520A
6522A
7223
–
–
–
7227
5628
–
5030A
7231B
7232B
7233
6535A
7236A
5037
5038
7239A
7240
5041
5042
5043
–
–
6546
6547
5048
5049A
–
7269
6574Çc
8075Çb
–
8080A
72821B
–
72831
–
10085
5086
7287
5088B
130T89
7290
8091B
5092
–
6595
6596A
MAN1
–
501009
56110
65111
65112A
–
–
65117
65118
72122A
56135
–
–
–
–
SS
FA-72GK
80GK01C
8006B
91S07
8008A
8009
7210A
6514
72GK15
7217A
6519
6520A
6522A
7223
–
–
–
7227
5628
–
5030A
7231B
7232A
72GK33
6535A
7236A
5037
5038
7239A
7240
5041
5042
5043
–
–
6546
6547
5048
50GK49
–
7269
6574D
8075C
–
8080A
72821B
–
72831
–
10085
5086
7287
5088B
130T89
7290
8091B
5082
50GK93
5095
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
72122A
56135
–
–
–
–
I
FA-80
8001C
8006B
91S07
8008A
8009
6510C
6514
8015A
6517A
6519
91S20A
6522A
8023B
–
–
–
6527
5628
–
5030A
5031
8032B
6533B
6535A
5036A
5037
5038
6539
6540
5041
5042
5043
–
–
6546
6547
5048
5049A
–
8069A
6574D
8075C
–
8080A
80321C
–
80831A
–
10085
5086
8087A
5088B
5089
5090A
5091B
5092
–
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
65122A
56135
–
–
–
–
J
FA-80GK
80GK01C
8006B
91S07
8008A
8009
6510C
6514
80GK15A
80GK17A
6519
91S20A
6522A
8023B
–
–
–
6527
5628
–
5030A
5031
8032B
65GK33B
6535A
5036A
5037
4038
6539
6540
5041
5042
5043
–
–
6546
6547
5048
50GK49
–
8069A
6574D
8075C
–
8080A
80821C
–
80831A
–
10085
5086
8087A
5088B
5089
5090A
8091B
5092
50GK93
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
65122A
56135
–
–
–
–

15
PARTS LIST
Medium Single-Cylinder Cross-Reference Chart
Figure 4C
PART
01 Cylinder, Left
06 Piston
07 Piston Pin
08 Piston Pin Retainer (6 Pc)
09 Piston Ring
10 Connecting Rod
14 Cylinder Screw Set
15 Crankcase
17 Rear Cover (A)
19 Breather Nipple
20 Front Ball Bearing
21 Main Ball Bearing
22 Rear Ball Bearing
23 Crankshaft
24 Pinion-Crankhshaft
25 Pinion Gear-Pin
26 Collar, Crankshaft
27 Tapered Collet & Drive Flange
28 Prop Washet & Nut
29 Prop Nut, Spinnet
30 Prop Nut, Electric Starter
31 Crankcase Screw Set
32 Engine Gasket Set
33 Cam Gear Housing
35 Cam Gear, Right
36 Cam Gear Shaft
37 Teflon/Steel Washer Set
38 Tappet (2Pc)
39 Pushrod (2Pc)
40 Pushrod Cover Rubber Seal (Pr)
41 Rocker Arm (Pr)
42 Rocker Arm Screw Nut (2 Sets)
43 Rocker Arm Pin (2Pc)
44 Rocker Arm Bracket, Left
45 Rocker Arm Bracket, Right
46 Valve-In/Out (Pr)
47 Valve Spring, Keeper, Retainer (2 Sets)
48 Valve Retainer (4Pc)
49 Rocket Arm Cover (Pr)
68 Check Valve-In/Out (Pr)
69 Intake Manifold, Left
74 Muffler, Right
75 Muffler Manifold, Standard
79 Muffler Gasket (5 Pc)
80 Muffler Nut (2 Pc)
821 Carburetor-Complete, Left
822 Carburetor-Complete, Right
831 Carburetor Body Assembly, Left
84 Spray Bar Assembly
85 High Speed Needle Valve
86 High Speed Needle Valve Extension
87 Throttle Barrel Assembly
88 Throttle Lever
89 Idle Needle Valve
90 Carbutetor Screw & Spring Set
91 Carburetor Gasket Set
92 Chode Valve Assembly
93 Intake Veloclty Stack
95 Engine Mount
96 Tool Set
97 Instruction Manual
102 Fuel Pump System
109 F-1 Fuel Filter
110 Anti-Loosening Nut
111 Flexible Exhaust Pipe
112 Tuned Sllencer
114 Engine Bed
116 M3 Nut for Spinner
117 M4 Nut for Spinner
118 M5 Nut for Spinner
122
Spray bar with internal p-2/External p-5"0"ring
135 Prop Washer/Nut/Anti-loosening Nut
136 Intake Manifold
137 Prop Washer
145 Spray bar with internal p-2"O"ring
151 Muffler Nut (1 Pc)
K
FA-91S
91S01A
91S06
91S07
6508
91S09
6510C
6514
91S15
91S17
6519
91S20A
–
91S22A
91S23A
–
–
–
6527
5628
–
5030A
5031
91S32A
6533B
6535A
5036A
5037
5038
91S39
60T40
5041
5042
5043
–
–
91S46
6547
5048
5049A
–
91S69
91S74C
8075C
–
8080A(1Pc)
91S821D
–
91S831B
–
10085
5086
91S87A
5088B
130T89
91S90
91S91A
5092
–
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
91S122B
56135
–
–
–
91S151
EE
FA-91SGK
91SGK01A
91S06
91S07
6508
91S09
6510C
6514
91SGK15
91SGK17
6519
91S20A
–
91S22A
91S23A
–
–
–
6527
5628
–
5030A
5031
91S32A
65GK33B
6535A
5036A
5037
5038
91S39
60T40
5041
5042
5043
–
–
91S46
6547
5048
50GK49
–
91S69
91S74C
8075C
–
8080A(1Pc)
91S821D
–
91S831B
–
10085
5086
91S87A
5088B
130T89
91S90
91S91A
5092
50GK93
6595
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
91S122B
56135
–
–
–
91S151
QQ
FA-100
10001
10006
10007
6508
10009
10010
6514
10015
10017
6519
91S20A
300T21
–
10023
–
–
–
6527
10028
120S29
10030
5031
10032
170R333
6535A
179R336A
125a-37
5038
10039
10040
5041
5042
5043
–
–
10046
6547
5048
5049A
–
10069
91S74C
8075C
–
8080A(1Pc)
100821
–
100831
–
10085
5086
10087
5088B
130T89
91S90
10091A
–
–
10095
6596A
MAN1
–
50109
170R3110
65111
65112A
–
–
120S117
120S118
91S122B
100135
–
–
–
91S151
UU
FA-100GK
100GK01
10006
10007
6508
10009
10010
6514
100GK15
100GK17
6519
91S20A
300T21
–
10023
–
–
–
6527
10028
120S29
10030
5031
10032
100GK33
6535A
170R338A
125a-37
5038
10039
10040
5041
5042
5043
–
–
10046
6547
5048
50GK49
–
10069
91S74C
8075C
–
8080A(1Pc)
100821
–
100831
–
10085
5086
10087
5088B
130T89
91S90
10091A
–
–
10095
6596A
MAN1
–
50109
170R3110
65111
65112A
–
–
120S117
120S118
91S122B
100135
–
–
–
91S151
AG
FA-125a
125a01
125a06
120S07
120S08
125a09
125a10
6514
125a15
10017
6519
120S20A
–
120S22
125a23
–
–
–
125a27
125a28
120S29
120S30
5031
125a32
170R333
6535A
170R336A
125A-37
5038
200Ti39
90TS40
5041
5042
5043
–
–
125a46
6547
5048
5049A
–
125a69
125a74
125a75
–
125a80
125a821
–
125a831
–
10085
6086
125a87
5088B
125a89
125a90
125a91
–
–
10095
125a96
MAN1
–
50109
170R3110
125a111
–
–
–
120S117
120S118
91S122B
125a135
–
–
–
–
AH
FA-125aGK
125aGK01
125a06
120S07
120S08
125a09
125a10
6514
125aGK15
100GK17
6519
120S20A
–
120S22
125a23
–
–
–
125a27
125a28
120S29
120S30
5031
125a32
100GK33
6535A
170R336A
125a-37
5038
200Ti39
90TS40
5041
5042
5043
–
–
125a46
6547
5048
60GK49
–
125a69
125a74
125a75
–
125a80
125a821
–
125a831
–
10085
5086
125a87
5088B
125a89
125a90
125a91
–
–
10095
125a96
MAN1
–
50109
170R3110
125a111
–
–
–
120S117
120S118
91S122B
125a135
–
–
–
–
AB
FA-B2a
82a01
10006
10007
6508
10009
82a10
6514
82a15
7217A
6519
91S20A
–
91S22A
82a23
–
–
–
7227
5628
–
5030A
7231B
82a32
7233
6535A
7236A
5037
5038
7239A
7240
5041
5042
5043
–
–
90S46
6547
5048
5049A
–
82a69
6574D
8075C
–
8080A
82a821
–
82a831
–
10085
–
91S87A
5088B
130T90
82a90
91S91A
–
–
5095
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
91S122B
56135
–
–
–
–
AC
FA-82aGK
82aGK01
10006
10007
6508
10009
82a10
6514
82aGK15
7217A
6519
91S20A
–
91S22A
82a23
–
–
–
7227
5628
–
5030A
7231B
82a32
72GK33
6535A
7236A
5037
5038
7239A
7240
5041
5042
5043
–
–
91S46
6547
5048
50GK49
–
82a69
6574D
8075C
–
8080A
82a821
–
82a831
–
10085
–
91S87A
5088B
130T89
82a90
91S91A
–
50GK93
5095
6596A
MAN1
–
50109
56110
65111
65112A
–
–
65117
65118
91S122B
56135
–
–
–
–

16 PROPELLER SELECTION
Propeller Selection
Saito Single-Cylinder Propeller Chart
In the chart below you will find a
propeller selection list. This chart will
enable you to select the best propeller
for initial setup of your Saito engine.
You will note a letter (A, B, C, etc.) stamped on the top of the motor mount. This letter
identifies the production version of your engine. Should you ever need to order a part or have a
question pertaining to your engine, specify this letter along with the engine type. This will
allow for easier identification of your engine.
NOTE: All recommendations are based on engines using APC props, Power Master 15%
2-stroke fuel, and Saito SAIP 400S glow plugs.
Remember, it is imperative to balance
each propeller prior to installation
onto your Saito engine. Failure to do
so may cause unwanted vibration in
your aircraft.
Figure5
ENGINE SPORT SCALE AEROBATICS
FA-30S(H)/30SGK
  
FA-40a/40aGK
  
FA-50/50GK
  
FA-56/56GK
  
FA-62a/62aGK
  
FA-65/65GK
  
FA-72/72GK
  
FA-80/80GK
  
FA-82a/82aGK
  
FA-91S/91SGK
  
FA-100/100GK
  
FA-125a/125aGK
  
NOTE: Observe operating rpm ranges as excessive rpm can result in damage to the engine.
 
     
 
     
     
 
     
 
     
     
 
     
 
     
   
     
   




 
   
   
   
   
     
     
     
 
     
 
     
   
     
   



 

     
     
     
     
     
     
 
     
 
     
   
     
   
   
 


17
ENGINE SPECS
Figure 6
Figure 7







 
OUTSIDE DIMENSIONS (mm)
Items









 


A












B












B1 B2 C1




!







C2




!







D




!







E




!







F




!







G




!







H




!







I




!







Figure 8
SPECIFICATIONS
Items









 


Disp
(cc)
"
"
"
"
"!
"
"
"
"
"
"
"
Bore
(mm)
"
"
"
"
"!
"
"
"
"
"
"
"
Stroke
(mm)
"
"
"
"
"!
"
"
"
"
"
"
"
Weight
(g)




!







K
(ISO)
 
 
# 
# 
# 
# 
# 
# 
# 
# 
# "
# "
HP
"
"
"
"
"!
"
"
"
"
"
"
"
Cylinder













18 PARTS LIST
No. Description Qty.
01
06
07
08
09
10
14
15
17
19
20
22
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
Cylinde r(left)
Piston
Piston pin
Piston pin retainer
Piston ring
Connecting rod
Cylinder screw set
Crankcase
Rear cover
Breather nipple
Front bearing
Rear bearing
Crankshaft
Pinion (crankshaft)
Pinion gearpin
Collar (crankshaft)
Taper collet & drive flange
Prop washer & nut
Prop nut-spinnet
Prop nut-electric starter
Crankcase screw set
Engine gasket set
Cam gear housing
Cam gear
Cam gear shaft
Steel washer set
Tappet
1
1
1
2
1
1
1 set
1
1
1
1
1
1
1
1
1
1 each
1 set
1 set
1 set
1 set
1 set
1
1
1
1 set
2
No. Description Qty.
39
40
41
42
43
44
45
46
47
48
49
68
69
74
75
77
80
89
821
831
84
85
87
91
93
102
110
151
Pushrod
Pushrod cover & rubber seal
Rocker arm
Rocker arm scraw & nut
Rocker arm pin
Rocker arm bracket (left)
Rocker arm bracke t(right)
Valve (in & out)
Valve spring & keeper & retainer
Valve retainer
Rocket arm cover
Checkvalve (in & out)
Intake manifold
Muffler
Muffler manifold
Muffler gasket
Muffler nut
Idle needle valve
Carburetor complete
Carburetor body assembly
Spray bar assembly
High speed needle valve
Throttle barrel assembly
Carburetor gasket set
Intake veloclty stack
Fuel pump system complete
Anti-loosening nut
Mufflre nut (FA91S,81SGK,100,100GK)
2
2 each
2
2 each
2
1
1
2
2 each
2
2
1 pair
1
1
1
5
2
1
1 set
1 set
1
1 set
1 set
1 set
1 set
1 set
1
1
Figure 9
75
80
151
151
※FA-91S, 91SGK, 100, 100GK
(91S151)
TO
Cylinder
TO
Muffler
Fuel Pump System Complete
FA-100/100GK(Main ball bearing)