User Manual

FINAL ADJUSTMENT
Open
Close
Close
Open
Needle Valve
Metering Needle
More fuel
Less fuel
More fuel Less fuel
Final adjustment should be carried out only after the
running-in has been completed.
Carry out adjustments patiently, under actual
running conditions, until the engine responds
quickly and positively to the throttle control.
Warning!
Mixture adjustments (whether via the Metering
Needle, or the Needle-Valve) cannot be made
accurately under 'no-load' conditions, which, in any
case, are not advised, since such operation carries
the risk of seriously damaging the engine through
over-revving and overheating.
CARE AND MAINTENANCE
1.
2.
3.
The minute particles of foreign matter, that are present in
any fuel may, by accumulating and partially obstructing
fuel flow, cause engine performance to become erratic
and unreliable.
O.S. 'Super-Filters' (large and small) are available, as
optional extras, to deal with this problem.
One of these filters installed to the pickup tube inside
your refueling container, will prevent the entry of foreign
material into the fuel tank. It is also recommended that a
good in-line filter be installed between the tank and
carburetor.
Do not forget to clean the filters regularly to remove
dirt and lint that accumulate on the filter screens.
Also, clean the carburetor itself occasionally.
At the end of each operating session, drain out any fuel
that may remain in the fuel tank. Afterwards,energize
the glow-plug and try to restart the engine, to burn off
any fuel that may remain inside the engine. Repeat this
procedure until the engine fails to fire. Do this while the
engine is still warm.
4.
Then, inject some after-run oil into the engine, and
rotate the engine with an electric starter for 4 to 5
seconds to distribute the oil to all the working parts.
Note:
Dirt and dust may lodge in marked places.
5.
Finally, when cleaning the exterior of the engine, use
methanol or a household cleaning agent. Do not use
gasoline, kerosene, or any petroleum based
chemical which can damage silicone fuel tubing.
CHECKING THE ENGINE
If the engine will not develop normal performance after
long time running due to wearing of parts. It is suggested
to replace necessary parts when the following symptoms
are detected.
Engine sound changes and easily overheats.
Power has dropped extremely.
Idle is unstable and/or engine tends to stop at idle.
In most cases, ball bearings, cylinder & piston assembly,
connecting rod and/or crankcase have become worn.
Check the parts carefully and replace them if necessary.
O.S. GENUINE PARTS & ACCESSORIES
71410150
71410200
71410250
71410300
71411200
71411250
71412300
71413550
71413600
71413700
O.S. SPEED HEX WRENCH DRIVER 1.5
O.S. SPEED HEX WRENCH DRIVER 2.0
O.S. SPEED HEX WRENCH DRIVER 2.5
O.S. SPEED HEX WRENCH DRIVER 3.0
O.S. SPEED HEX BALL WRENCH DRIVER 2.0
O.S. SPEED HEX BALL WRENCH DRIVER 2.5
O.S. SPEED FLAT HEAD SCREWDRIVER 3.0
O.S. SPEED NUT DRIVER 5.5
O.S. SPEED NUT DRIVER 6.0
O.S. SPEED NUT DRIVER 7.0
O.S. SPEED DRIVER TOOLS
Code No.
Description
71414015
71414020
71414025
71414030
71414120
71414125
71414230
71414355
71414360
71414370
O.S. SPEED HEX WRENCH TIP ONLY 1.5
O.S. SPEED HEX WRENCH TIP ONLY 2.0
O.S. SPEED HEX WRENCH TIP ONLY 2.5
O.S. SPEED HEX WRENCH TIP ONLY 3.0
O.S. SPEED HEX BALL WRENCH TIP ONLY 2.0
O.S. SPEED HEX BALL WRENCH TIP ONLY 2.5
O.S. SPEED FLAT HEAD SCREWDRIVER TIP 3.0
O.S. SPEED NUT DRIVER TIP ONLY 5.5
O.S. SPEED NUT DRIVER TIP ONLY 6.0
O.S. SPEED NUT DRIVER TIP ONLY 7.0
Code No. Description
The specifications are subject to alteration for improvement
without notice.
O.S. GLOW PLUG
(71520100)
(71415100)
(71415200)
(71415300)
O.S. SPEED CLUTCH WRENCH & ADJUSTER
O.S. SPEED FLYWHEEL KEY
O.S. SPEED FLYWHEEL PULLER
O.S. SPEED PLUG WRENCH
http://www.os-engines.co.jp
6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan
TEL. [phone]
FAX. [phone]
Dimensions (mm)
THREE VIEW DRAWING
79871020
79871150
M2.6x7
M3x15
CAP SCREW SETS
(
10pcs./set
)
Code No.
Size Pcs. used in an engine
Cylinder Head Retaining Screw (4pcs.)
Cover Plate Retaining Screw (4pcs.)
ENGINE EXPLODED VIEW
CARBURETOR EXPLODED VIEW
Type of screw
S...Set Screw
Type of screw
C...Cap Screw
ENGINE PARTS LIST
The specifications are subject to alteration for improvement without notice.
CARBURETOR PARTS LIST
Description
Code No.
No.
Description
Code No.
No.
Outer Head
Inner Head
Built-Up Parts Set
Cylinder & Piston Assembly
Piston Pin
O.S.SPEED Piston Pin Retainer 2 (6pcs.)
Connecting Rod w/piston pin retainers 2 (3pcs.)
Carburetor Complete (Type 12D2)
Carburetor Retainer Assembly
M3.5x0.60 Nut (2pcs.)
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Gasket Set
Cover Plate
Glow Plug T-P4
O.S. SPEED Exhaust Seal Ring 12 (10pcs.)
O.S. SPEED
Dust Cap Set For 12-30 Class
Run the vehicle (with throttle fully open) over the
longest available straight course, in order to observe
the model's speed. Next return the car to the starting
point, close the Needle-Valve 15˚ and repeat the run,
taking note of the improvement in performance.
Continue with further runs, gradually reducing the
Needle-Valve setting and aiming to achieve the
highest straight-line speed. Remember, however,
that, if the Needle-Valve is shut down too far, the
engine will overheat and, accompanied by visibly
diminished exhaust smoke, the model will lose
speed. At this point, throttle down immediately, stop
the vehicle and reopen the Needle-Valve 15˚.
With the engine running, close the throttle and
allow it to idle for about five seconds, then reopen
the throttle fully. If, at this point, the engine puffs
out an excessive amount of smoke and the vehicle
does not accelerate smoothly and rapidly, it is
probable that the idle mixture is too rich.
In this case, turn the Metering Needle clockwise
15˚. If, on the other hand, the engine tends to
speed up momentarily and then cut out abruptly
when the throttle is opened, the idle mixture is too
lean. Correct this by turning the Metering Needle
counter-clockwise 15˚.
With the optimum mixture control position, light
smoke is visible during high speed running,and the
engine rpm increases smoothly during acceleration.
Remember that, if the engine is operated with the
fuel/air mixture slightly too lean, it will overheat and
run unevenly. As with all engines, it is advisable to
set both the needle-valve and metering needle
slightly on the rich side of the best rpm setting, as a
safety measure.
If the engine runs too fast with the throttle closed, the
throttle stop screw should be turned counter-clockwise
to allow the throttle opening to be reduced.
Finally, beyond the nominal break-in period, a slight
readjustment toward a leaner needle setting may be
required to maintain maximum performance.
Do not inject after-run oil into the carburetor as
this can cause the O rings inside the carburetor to
deteriorate.
Add the oil through the glowplug hole and turn the
engine over several times by hand.
(21414120)
(72412000)
(72412100)
(72414000)
(72414100)
(72150010)
(72150020)
(72106172)
(21427200)
(71605100)
No.10 (Former A5)
(71608001)
No.8
(71607100)
No.7
(72412200)
(72414200)
(72506100)
(21427200)
202 Cleaner Body
202 Filter Element (4pcs.)
On-road Type
INDUCTION SILENCER
Induction Silencer Filter (3pcs.)
FOR NORMAL PLUG INNER HEAD
TT02 EFRA2690 (T-1080SC L52)
Tuned Silencer Assembly
MT02(M1007SC) Exhaust Manifold ASSEMBLY
Exhaust Manifold Spring (2pcs.)
Adapter Seal Ring (2pcs.)
SUPER AIR CLEANER 202 ASSEMBLY
ON-ROAD FILTER OIL (20ml)
2.5mm x 1000mm
O.S. SPEED CILICONE TUBE
O.S. SPEED EXHAUST SEAL RING 12
(2pcs.)
1
1-1
1-2
2
2-1
3
3-1
4
5
5-1
6
7
7-1
8
21681900
27881820
2AP81950
21982620
22781800
21418110
21982900
21682200
21538500
22781800
21982520
23818430
26381501
22615000
Needle Valve Assembly
"O" Ring (2pcs.)
No.21 Universal Nipple Assembly
Throttle Stop Screw
"O" Ring (S) (2pcs.)
Carburetor Body
Thermo Insulator
Slide Valve
Metering Needle Assembly
"O" Ring (S) (2pcs.)
Dust Cover
Ball Link No.5
Set Screw
Carburetor Rubber Gasket
Exhaust Seal Ring (2pcs.)
Joint Spring (3pcs.)
(22826140)
(72106042)
(71417100)
No.1
(71417200)
No.2
(71415500)
(71415400)
O.S. SPEED BODY REAMER
O.S. SPEED SPRING REMOVER
O.S. SPEED PHILLIPS SCREW DRIVER
O.S. SPEED PHILLIPS SCREW DRIVER
Displacement
Bore
Stroke
Output
Practical R.P.M.
Weight
(Engine)
SPECIFICATIONS
Copyright 2020 by O.S. Engines Mfg. Co., Ltd. All rights reserved. Printed in JAPAN.
60093710 112001
3mm (2pcs.)/ 16mm (2pcs.)/ 18mm (1pc)
2.10 cc / 0.128 cu.in.
13.8 mm / 0.543 in.
14.0 mm / 0.551 in.
0.9 ps / 0.88 hp / 30,000 r.p.m.
5,000-32,000 r.p.m.
216 g / 7.62 oz.
(71641300)
P3
(71641400)
P4
O.S. GLOW PLUG
(T-type head)
(Normal type head)
(71550000)
PRESSURE CHAMBER SET
O.S. SPEED CLUTCH BEARING (1050ZZ)
(71550001) (4pcs.)
(71550002) (10pcs.)
(71801110)
O.S. SPEED FLYWHEEL COLETE (2pcs.)
(73300305)
O.S. SPEED DUST CAP SET 3mm
(5pcs.)
(73301612)
O.S. SPEED DUST CAP SET 16mm
(3pcs.)
(73301812)
O.S. SPEED DUST CAP SET 18mm
(3pcs.)
(71492000)
O.S. SPEED PISTON PIN RETAINER PLIERS
(72107600)
(72107610)
(72107620)
TT01 EFRA2672 (T-1070SC L52) COMPLETE SET
TT01 EFRA2672 (T-1070SC L52)
Tuned Silencer Assembly
MT01(M1006SC) Exhaust Header Pipe Assembly
(72106172)
(21427200)
(22826140)
(72106042)
Exhaust Seal Ring (2pcs.)
Joint Spring (3pcs.)
Header Pipe Spring (2pcs.)
Exhaust Seal Ring (2pcs.)
(72106980)
TT02II EFRA2690 (T-1080SC L52) COMPLETE SET
(72150020)
(72106172)
(21427200)
MT03 Exhaust Manifold ASSEMBLY
Exhaust Manifold Spring (2pcs.)
Adapter Seal Ring (2pcs.)
(71641500)
P5
1
2
C.M3x15
3
3-1
3-2
3-3
3-4
4
5
5-1
7
6
9
8
11
10
C.M2.6x7
1
2
3
3-1
3-2
3-3
3-4
4
5
5-1
6
7
8
9
10
11
2D204000
21674100
2D203100
2D203000
21656000
2AP17000
2A405001
21418010
25381701
23325340
21630500
2D201000
21931010
21412000
21411400
21417000
71641400
21427210
22884254
1
2
1-1
1-2
2-1
3
3-1
4
5-1
5
6
7-1
7
S.M3x3
8
25.4
39
29.5
34.9
15.1
UNF1/4-28
11
73.3
1
31.4
4- 3.3