User Manual

O.S. GENUINE PARTS & ACCESSORIES
(72403050)
(55500004)
(71531010)
(
L
)
LOCK WASHER (10sets)
M5
NON-BUBBLE WEIGHT
(
S
)
(72403051)
SUPER FILTER
Dimensions (mm)
THREE VIEW DRAWING
http://www.os-engines.co.jp
ENGINE EXPLODED VIEW & PARTS LIST
Type of screw
C...Cap Screw
6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan
TEL. [phone]
FAX. [phone]
The specifications are subject to alteration for improvement without notice.
(
S
)
PROPELLER LOCKNUT SET FOR SPINNER
5/16"-M5
(45910200)
(45910300)
5/16"-M4
Description
Code No.
No.
Rocker Cover
Rocker Arm Retainer (2pcs./1pair)
Rocker Support
Rocker Arm (1pc.)
Tappet Adjusting Screw (1pair)
Split Cotter (2pcs./1pair)
Valve Spring Retainer (1pc.)
Valve Spring (1pc.)
Rocker Cover Gasket
Cylinder Head (W/Gasket)
Head Gasket (2pc.)
Intake Valve (1pc.)
Exhaust Valve (1pc.)
Cylinder Liner
Piston Ring
Piston
Piston Pin Retainer (2pcs.)
Piston Pin
Connecting Rod
Crankcase
Push Rod (2pcs.)
Push Rod Cover "O" Ring (2pcs.)
Push Rod Cover (1pc.)
Cam Follower (2pcs.)
Lock Nut Set
Propeller Washer
Drive Hub
Thrust Washer
Crankshaft Ball Bearing (Front)
Camshaft Bearing (1pc.)
Camshaft
Cam Cover
"O" Ring
Crankcase Plug
"O" Ring
Crankshaft Ball Bearing (Rear)
Crankshaft
Crank Pin Stop Screw
Woodruff Key
Cover Gasket
Cover Plate
PCV Valve Set
Pump Unit PD-09
Pan Head Screw (N.+M3x12 10pcs.)
Rotation Sensor
Rotation Sensor Retaining Screw Set (2pcs.)
Intake Manifold Gasket (2pcs.)
Intake Manifold
Carburetor Complete (Type 70T2)
Thermo Insulator (2pcs.)
F-6040 Silencer Assembly
Silencer Body
Silencer Gasket (2pcs.)
Exhaust Header Pipe Assembly
Exhaust Header Pipe Nut M16 (1pc.)
Ignition Module (IG-07)
Spark Plug 1/4-32 (Rcexl)
(
28382100
)
ID. 2mm × OD. 4mm Length 500mm
(
28382200
)
ID. 3mm × OD. 5mm Length 500mm
FLUORORUBBER TUBE
Use a fuel with increased oil content and set the
needle a little on the rich side. Too rich a needle
setting may cause misfiring or erratic running due to
fouling of the plug.
Use a 25:1 fuel/oil mixture if the particular brand of
oil states 50:1 mix. Use a 20:1 fuel/oil mixture if the
particular brand of oil states 25:1 mix. Set only the
needle valve 200 below maximum rpm. The mixture
control valve need not be richened.
No need to carry out running-in on a bench nor with
the model fixed. Just fly the model with the above
mentioned fuel and needle setting.
A total of 10 flights (2 litters fuel) are required.
Avoid prolonged full throttle running at initial stage,
and gradually extend the full throttle running time.
RUNNING-IN
WARNING:
When ground running the engine, avoid dusty or
sandy locations. If dust or grit is drawn into the
engine, this can have a ruinous effect, drastically
shortening engine life in a matter of minutes.
Open the needle-valve 2.5 to 3 turns from the fully
closed position. (Mixture control valve is pre-set at
nearly best position when the engine leaves the
factory.Therefore, do not adjust the mixture control
valve at this point.)
Turn the transmitter switch ON.
Turn the receiver switch ON.
Turn the igniter switch OFF.
Set the throttle at half opened position.
Draw the fuel to the carburetor by turning the
engine for 7 to 8 seconds with an electric starter.
Set the throttle at 1/8 open from the fully closed
position.
Turn the igniter switch ON.
Tell the helper and onlookers that you will start the
engine now and have the helper hold the model
securely.
Apply an electric starter to start the engine.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
STARTING
The GF30 cannot be started by flipping a propeller.
Be use to use an electric starter to start the engine.
The GF30 is not equipped with a choke valve.
Draw the fuel to the carburetor by an electric starter.
Although the carburetor’s appearance and construction
resemble conventional glow engine’s carburetor, how
to adjust is completely different from that for glow
engine‘s carburetor. Please study the following
instructions so as to familiarize yourself with the
controls and other features of the engine.
CARBURETOR ADJUSTMENT
1.
Before attempting to operate your engine
It is expected the engine runs a little unstably
(uneven RPM and light breathing) until the inside
parts of the carburetor get used to the fuel (around
when the running-in is completed) but the engine
won’t quit. Run the engine as it is. Also, for about 10
seconds after the first starting of the day, it is
expected the engine runs unstably but the engine
won’t quit. Run the engine as it is.
2.
Key points for adjustments
Mixture control valve is pre-set at nearly best
position when the engine leaves the factory.
Therefore, it is not necessary to adjust the mixture
control valve until running-in is completed.
Adjust the needle-valve only.
1)
With a conventional glow engine, the needle-valve
is gradually closed from the rich mixture. On the
contrary, with the GF30, the needle-valve is
opened from the lean mixture. Please fully note
this difference.
2)
3.
Adjustments
1) Needle-valve adjustment
Open the throttle fully gradually when the engine is
started.
Close the needle-valve and the engine RPM
increase. (Close the needle-valve at a pace of
30~45 degrees/second smoothly.)
1.
2.
Open the needle-valve 60-90 degrees further from
the point where maximum RPM are obtained. This
is the nearly best needle-valve position.
5.
Fly the model with this needle-valve position until
running-in is completed (10 full tank or 2 liters
flights). Please observe the general precautions
during running-in such as to avoid prolonged full
throttle running and increase load gradually.
2) Mixture control valve adjustment
1.
2.
3.
4.
5.
6.
7.
8.
Hereafter adjust the needle-valve and/or mixture control
valve if required according to the flight conditions.
Please note with this carburetor, needle-valve adjustment
does not effect the mixture control valve adjustment but
the mixture control valve adjustment effects the
needle-valve adjustment. Therefore, it is required to
adjust also the needle-valve when the mixture control
valve is adjusted.
Mixture Control Valve
Carburetor Body
REALIGNMENT OF MIXTURE CONTROL VALVE
In the course of making carburetor adjustments, it is just
possible that the Mixture Control Valve may be inadvertently
screwed in or out too far and thereby moved beyond its
effective adjustment range.
Note
Generally, a gasoline engine is sensitive to a lean
mixture compared with a glow engine, and will
stop without warning hesitation and stops with
overheating. It is recommended that the engine be
run with a slightly richer mixture.
VALVE ADJUSTING
Valve clearances are correctly set before any O.S.
engine leaves the factory and, in normal use, will
seldom require adjustment. However, if, after a
considerable amount of running time, a loss of power
is detected, or if he engine has been disassembled for
repair, these clearances should be checked and reset
as necessary. Clearance should be 0.04mm - 0.1mm
(.0015" - .004") For checking and adjusting the valve
clearances, a VALVE ADJUSTING TOOL KIT is
available as an optional accessory.
• Feeler gauge 0.04mm
The kit comes in a plastic case and includes:
(Code No.72200060)
• Feeler gauge 0.1mm
• Hex. key 1.5mm
• Wrench 5mm
• Wrench 5.5mm
When the engine is started, make sure the radio
control system works normally (distance test).
Engine does not run erratic with full throttle.
Idling is stable.
Responds positively to the throttle operation.
Warm-up is finished.
FLIGHT & MAINTENANCE
Checking prior to flight
Warm-up is required as with full size aircraft and car
engines. Take off the model after warming the engine
for approx. 10 seconds with full throttle.
Precautions in flight
A slight engine rpm increase and decrease delay is
normal. Abrupt throttle operation will the cause
engine to quit. Move throttle smoothly.
Cooling is more vitally important to a gasoline engine
than to a glow engine. If overheating symptoms (loss
of power at full throttle or exhaust note at mid speed
changes from cloudy one to clear one) are observed
during flight, immediately stop flying and carry out
the following countermeasures.
Enlarge the air intake cutout on the cowling.
Enlarge the air outlet cutout on the cowling. (It is
vitally important.)
Partly cover the air intake cutout on the cowling
where air does not hit direct the engine.
Install an air guiding plate on the fuselage and
cowling so that cooling air may be guided to the
cylinder portion of the engine and muffler.
When the interval between the flights is short and
the engine is still hot, it may be possible overheating
symptoms are observed by circulating the head from
the former flight through the engine even if the
overheating symptoms were not observed during
the former flight. In this case, leave it until the
engine is fully cooled down (in hot weather, it may
take more than one hour.) or run the engine for 4 to
5 minutes at idle.
1
)
2
)
3
)
4
)
Maintenance after the day’s flights
Please pay attention to the matter described below
to ensure that your engine serves you well in
regard to performance, reliability and long life.
Check the tightening of each screw, especially
engine installation screws and silencer installation
screws each time. Also, for the first several flights,
tighten the screws after each flight.
Fill the carburetor with fuel at the conclusion of a
day's flying. (Pay careful attention to fire and ignition
source when carrying and storing the model.)
If the engine is stored without filling the carburetor,
with fuel the inside parts will dry out and not work
properly at the next running. If the engine quits out
of fuel, refill the carburetor with fuel.
When the engine is not to be used for a long period
(more than a year), remove the engine from the
model, clean the outside then remove the
carburetor, and plug all tubing. Clean inside the
engine by rotating the crankshaft with the engine
immersed in container filled with gasoline.
Also use gasoline to clean the outside of the
carburetor. Clean the outside only because the
inside parts are sensitive to foreign substances.
As previously mentioned, it is vitally important to
avoid operating the engine in conditions where dust,
distributed by the propeller, may be deposited on the
engine and enter its working parts.
Remember to keep your fuel container closed to
prevent foreign matter from contaminating the fuel.
Install a fuel filter to prevent foreign matter in the fuel
container from entering the fuel tank. O.S. Super
Filter (L) is available as an optional extra.
Install an in-line fuel filter between the tank and
carburetor to prevent foreign matter in the tank from
entering the carburetor.
Clean these filters periodically.
If these precautions are neglected, restrictions of
fuel flow may cause the engine to cut out, or the
fuel/air mixture to become too lean causing the
engine to overheat.
With a gasoline engine rust hardly occurs. Check
the exterior to make sure there is nothing wrong and
wipe off any oil res.
VALVE ADJUSTING TOOL KIT
(72200060)
(71521000)
LONG SOCKET WRENCH WITH PLUG GRIP
(Engine)
(Silencer)
(Ignition module)
1
1-1
1-2
1-3
1-4
1-5
2
3
4
5
5-1
5-2
6
7
7-1
8
C
60093690 042001
Copyright 2019 by O.S. Engine Mfg. Co., Ltd. All rights reserved. Printed in JAPAM.
CAP SCREW SETS
(
10pcs./sets
)
Code No.
Size
Carburetor Retaining Screw (2pc.)
Pcs. used in an engine
Cylinder Head Retaining Screw (6pcs.)
Cover Plate Retaining Screw (4pcs.)
Cam Cover Retaining Screw (3pcs.)
Silencer Assembly Screw (4pcs.)
Rocker Cover Retaining Screw (2pcs.)
79871020
79871030
79871040
79871120
79871140
79871250
79871100
M2.6x7
M2.6x10
M2.6x12
M3x10
M3x12
M3x25
M3.5x20
Rocker Support Retaining Screw (1pc.)
CARBURETOR EXPLODED VIEW & PARTS LIST
Type of screw
N...Round Head Screw S...Set Screw
Needle Valve Assembly
Needle Assembly
"O" Ring (2pcs.)
Set Screw
Needle-valve Holder Assembly
Ratchet Spring No.4
Fuel Inlet (Nipple No.1)
Carburetor Body
Roter Guide Screw
Mixture Control Valve Assembly
"O" Ring (L) (2pcs.)
"O" Ring (S) (2pcs.)
Carburetor Rotor
Throttle Lever Assembly
Throttle Lever Retaining Screw
Carburetor Gasket (2pcs.)
No.
Code No.
Description
(For Fuel Container)
(For Fuel Tank)
Fig.1
Make sure the mixture control valve is at the factory
setting. (see Fig.1)
After starting the engine, open the throttle fully for 5
to 6 seconds to warm up the engine, and adjust the
main needle as previously shown.
Set the idling at around 2,000 rpm with the throttle
trim on the transmitter.
Move the throttle stick from the idling to the fully open
position several times repeatedly, and measure the
idling rpm with a tachometer. In case idling is unstable
and the rpm decrease gradually in 20 seconds at the
idling position, the mixture control valve is set rich. On
the other hand, the mixture control valve is set lean if
the rpm increases at the idling position, or the engine
doesn’t respond quickly to reduce the rpm at around
2,000 rpm when the throttle stick is moved from the
fully open position to the idling position.
Stop the engine. If the adjustment is rich, turn the
mixture control valve clockwise 30 degrees at maximum
per each adjustment. If the adjustment is lean, turn the
mixture control valve counter-clockwise. Each
adjustment should be within 30 degree needle turn.
Repeat the procedures 2 – 5 until the idling rpm
becomes stable. After deciding the mixture control valve
adjustment, determine the final main needle adjustment.
Set the idling rpm with the throttle trim on the
transmitter at the optimal position depending on the
propeller size and the airplane model.
The engine is almost ideally adjusted if the engine
accelerates smoothly from idling to full throttle even
you move the throttle stick quicker and slower.
Move the throttle stick quickly to full throttle. In case
the engine hesitates before picking up speed or
even ceases firing, the mixture control valve is set
lean. Stop the engine and open the mixture control
valve 15 degrees counter-clockwise.
Move the throttle stick slowly to fully throttle. In case
the engine responds sluggishly to increase rpm, or
the idling rpm is unstable, the mixture control valve
is set rich. Stop the engine and close the mixture
control valve 15 degrees.
Whenever the mixture control valve is readjusted,
the main needle should be readjusted.
When the needle-valve is closed further, engine
RPM stop increasing and then RPM start decreasing.
Close the needle-valve 60 to 90 degrees further from
the point where RPM start decreasing.
3.
Then, open the needle-valve rather slowly (at a
pace of 15 degrees/second) and the engine RPM
increase.
4.
Displacement
Bore
Stroke
Output
Practical R.P.M.
Weight
SPECIFICATIONS
Also, a 5.5mm wrench (not supplied) is required
for this purpose.
(71904400)
29.94 cc / 1.827 cu.in.
38.0 mm / 1.496 in.
26.4 mm / 1.039 in.
2.8 ps / 2.76 hp / 9,000 r.p.m.
1,800-9,000 r.p.m.
1010 g / 34.92 oz.
113 g / 3.99 oz.
95 g / 3.35 oz.
28181900
28181970
28181910
26381501
27381940
26711305
22681953
4A082100
45581820
4A081600
28181920
28181910
4A081210
27881400
22081313
4A081500
119.5
76.5 69.4
UNF 5/16-24
40
145.9
81.8
98
112
146
49.4
70
60
25
12.5
70°
54 68
145.9
64
7-1
7
6
5-1
5-2
5
8
4
3
1-3
1-2
1-1
1-5
1-4
1
2
2
S.M3x3
N.+M3x6
C.M2.6x7
5
7
C.M2.6x10
1
2
3
4
6
21
22
23
8
9
10
11
12
13
14
16
15
17
19
31-1
18
24
25
26
27
28
10-1
29
30
31
32
24-1
33
35
34
36
37
39
38
40
42
41
43
45
44
C.M3x12
C.M3.5x20
20
28
41-1
C.M3x25
C.M3x10
46-2
46-1
46-3
46-4
C.M2.6x12
30-1
46
1
2
3
4
5
6
7
8
9
10
10-1
11
12
13
14
15
16
17
18
19
20
21
22
23
24
24-1
25
26
27
28
29
30
30-1
31
31-1
32
33
34
35
36
37
38
39
40
41
41-1
42
43
44
45
46
46-1
46-2
46-3
46-4
4A004200
45761600
49464000
42561100
44561200
45560410
49460400
49460200
44514300
4A004100
44514100
49460100
49460110
4A003100
44503400
4A003200
28317000
4A006000
4A005000
4A001000
4A066000
45566310
49466100
44564000
28310000
28309000
4A008000
45520000
29431000
45231100
44562000
44501100
44501110
29701300
29701310
29030001
4A002000
28152100
45508200
29061410
4A007010
49407010
72508200
79871702
74002320
74002321
4A014110
4A069400
4A082010
4A069460
49425000
49425100
44525110
44525200
44525210
74002811
71669020
To return to the factory setting,
turn the mixture control valve
1/2 counter-clockwise, which
is around 0.25mm protruding
from the rim of the carburetor
body from flush position.
RADIAL MOUNT SET GF30/GF30II
※ We put 1 piece of gasket in the cylinder head as the factory
setting although we sell 2 pieces as spare parts (#44514100).