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.
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:
Do not inject after-run oil into the carburetor as
this may cause the O-rings inside the carburetor to
deteriorate. These procedures will reduce the risks
of starting difficulties or corrosion after a period of
storage.
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.
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
(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
Run the vehicle (with throttle fully open) over the
longest available straight course a few times to
observe the model’s speed. Return the vehicle to the
starting point and close the Needle-valve 10~15°and
repeat the run, taking note of the improvement in
performance.
Continue with further runs, gradually reduce the
Needle-valve setting aiming to achieve the highest
straight-line speed (optimum position).
Remember, however, if the Needle-valve is closed too
far, the engine will overheat, accompanied by visibly
diminished exhaust smoke and the model will lose
speed. At this point, throttle down immediately, stop
the vehicle and reopen the Needle-valve 30°.
After setting the Needle-valve at optimum position,
run the vehicle a few times at the straightway, and
stop the vehicle. With the engine still running, close
the throttle and allow it 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 or even stops, it is
probable that the idle mixture is too rich. In this
case, turn the Metering needle clockwise 30~45°.
If, on the other hand, the engine tends to speed up
momentarily with little smoke and then cut out
abruptly when the throttle is opened, the idle
mixture is too lean. In this case, turn the Metering
needle counter-clockwise 30~45°.
1.
2.
3.
NEEDLE VALVE ADJUSTMENT
METERING NEEDLE ADJUSTMENT
THROTTLE STOP SCREW ADJUSTMENT
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.
OPTIMUM MIXTURE CONTROL POSITION
With the optimum mixture control position, light smoke
is visible during high speed running and the engine rpm
increase smoothly during acceleration. Carry out
adjustment 1.~3. patiently until the engine responds
quickly and positively to the throttle control.
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.
Finally, beyond the normal break-in period, a slight
readjustment toward a leaner needle setting may be
required to maintain maximum performance.
Note:
Please regard the standard positions in the
instruction manual as just a guide. Positions will
vary due to the fuel and silencer used. In general,
if a fuel containing less nitromenthane is used, the
needlevalve will need to be closed further.
Remember, closing the needlevalve too far can
cause rusting and damage to the engine.
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.
Dirt and stain stuck on the engine and silencer/manifold
cause lowering heat dissipation effect. When dirt and
stain are detected, remove the engine from the chassis
and clean it with alcohol.
REMOVING DIRT/STAIN
When storing the engine, install the cap on the exhaust
port, carburetor, etc. to prevent dust from entering the
engine.
INATALLING DUST CAPS
O.S. GENUINE PARTS & ACCESSORIES
O.S. GLOW PLUG
(71642060)
RP6
(71642070)
RP7
(71642080)
RP8
(72106850)
(72106851)
(72106870)
T-2080SC TUNED SILENCER COMPLETE SET
T-2080SC Tuned Silencer Assembly
M2001SC Exhaust Header Pipe Assembly
(72101272)
(22826140)
(22826140)
(72106042)
Exhaust Seal Ring (2pcs.)
Joint Spring (3pcs.)
Header Pipe Spring (2pcs.)
Exhaust Seal Ring (2pcs.)
(72414000)
(72414100)
(72414200)
Induction Silencer Filter (3pcs.)
PRESSURE CHAMBER SET
(71550000)
INDUCTION SILENCER
ON-ROAD FILTER OIL (20ml)
(5pcs.)
(3pcs.)
(72412000)
(72412100)
(72412200)
202 Cleaner Body
202 Filter Element (4pcs.)
On-road Type
SUPER AIR CLEANER 202 ASSEMBLY
(71490000)
(71491000)
O.S. SPEED CARBURETOR REPAIR KIT 21
O.S. SPEED CARBURETOR REPAIR PARTS 21
O.S. SPEED Carburetor Repair Parts 21
(71491000)
(73301612)
(73301812)
(22884254)
(73300305)
(72506100)
2.5mm x 1000mm
(22826145)
(21817010)
(71801110)
O.S. SPEED CILICONE TUBE
O.S. SPEED EXHAUST SEAL RING 21
(
10pcs.
)
O.S. SPEED PISTON PIN RETAINER 4mm (6pcs.)
O.S. SPEED FLYWHEEL COLETTE
O.S. SPEED DUST CAP SET FOR 12-30 CLASS
(2pcs.)
3mm(2pcs.) / 16mm(2pcs.) / 18mm(1pc.)
DUST CAP SET 3mm
DUST CAP SET 16mm
(3pcs.)
DUST CAP SET 18mm
(71550001)
(71550002)
O.S. SPEED CLUTCH BEARING (1050ZZ 4pcs.)
O.S. SPEED CLUTCH BEARING (1050ZZ 10pcs.)
OUTER HEAD 8S O.S.SPEED R2101
(2A004001)
