It is of vital importance, before attempting to
operate your engine, to read the general
'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-5 of this booklet and to strictly
adhere to the advice contained therein.
Also, please study the entire contents of this
•
instruction manual, so as to familiarize yourself
with the controls and other features of the
engine.
Keep these instructions in a safe place so that
•
you may readily refer to them whenever
necessary.
It is suggested that any instructions supplied
•
with the vehicle, radio control equipment, etc.,
are accessible for checking at the same time.
CONTENTS
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE
INTRODUCTION, BASIC ENGINE PARTS
INSTALLATION
AIR CLEANER
NOTES CONCERNING THE RECOIL STARTER
GLOWPLUG
TOOLS, ACCESSORIES, etc.
CARBURETTOR CONTROLS
PRESSURIZED FUEL SYSTEM
STARTING THE ENGINE &
RUNNING-IN('Breaking-in)
2~517
7~8
~
10
8
10
~
11
~
12
11
~
13
12
~
14
13
14
~
16
15
IF THE ENGINE FAILS TO START
FINAL ADJUSTMENT
6
CARBURETTOR CLEANLINESS
CARE AND MAINTENANCE
O.S. GENUINE PARTS &
ACCESSORIES
ENGINES EXPLODED VIEW &
PARTS LIST
CARBURETTOR EXPLODED VIEW &
PARTS LIST
THREE VIEW DRAWING
1
17
22
28
30
~
18
19
20
21
~
27
~
29
~
32
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
Remember that your engine is not a "toy", but a highly efficient internalcombustion machine whose power is capable of harming you, or others, if it is
misused.
As owner, you, alone, are responsible for the safe operation of your engine, so act
with discretion and care at all times.
If at some future date, your O.S. engine is acquired by another person, we would
respectfully request that these instructions are also passed on to its new owner.
The advice which follows applies basically to ALL MODEL ENGINES and is
grouped under two headings according to the degree of damage or danger
which might arise through misuse or neglect.
WARNINGS
These cover events which
might involve serious (in
extreme circumstances, even
fatal) injury.
NOTES
These cover the many other
possibilities, generally less obvious
sources of danger, but which, under
certain circumstances, may also
cause damage or injury.
2
WARNINGS
•
Model engine fuel is poisonous. Do not allow it to
come into contact with the
eyes or mouth. Always
store it in a clearly marked
container and out of the
reach of children.
Model engine fuel is also
•
highly flammable. Keep it
away from open flame,
excessive heat, sources of
sparks, or anything else
which might ignite it. Do not
smoke or allow anyone else
to smoke, near to it.
•
Never operate your engine in an enclosed space. Model engines, like
automobile engines, exhaust deadly
carbon-monoxide. Run your engine
only in an open area.
Model engines generate
•
considerable heat. Do not
touch any part of your
engine until it has cooled.
Contact with the muffler
(silencer), cylinder head
or exhaust header pipe, in
particular, may result in a
serious burn.
3
This engine is intended for model cars.
•
Do not attempt to use it for any other
purpose.
Mount the engine in your model
•
securely, following the manufacturers'
recommendations, using appropriate
screws and locknuts.
Fit an effective silencer (muffler).
•
Frequent close exposure to a noisy
exhaust (especially in the case of the
more powerful highspeed engines)
may eventually impair your hearing
and such noise is also likely to cause
annoyance to others over a wide area.
NOTES
•
The wearing of safety glasses is also
strongly recommended.
Take care that the glowplug clip or
•
battery leads do not come into contact
with rotating parts. Also check that the
linkage to the throttle arm is secure.
For their safety, keep all onlookers
•
(especially small children) well back
(at least 20 feet or 6 meters) when
preparing your model for running.
4
•
To stop the engine, fully retard the
throttle stick and trim lever on the
trans-mitter, or, in an emergency, cut
off the fuel supply by pinching the fuel
delivery line from the tank.
Do not attempt to disassemble the
•
recoil starter of the 12CV-RX.
If you do so, the very strong spring
inside will be suddenly ejected. This
can be very dangerous.
Do not extend the starter cord more
•
than 45cm (18"). Do not abruptly
release the operating handle. Allow
the cord to rewind smoothly while
still holding the handle.
NOTES
•
Pull the operating handle straight out
when starting the engine, so that the
cord does not rub against the vehicle
body or engine. This will help prevent
the cord from being damaged by
abrasion or engine heat.
•
Warning! Immediately after a glowplugignition engine has been run and is still
warm, conditions sometimes exist
whereby it is just possible for the engine
to abruptly restart if it is rotated over
compression WITHOUT the glowplug
battery being reconnected.
5
The MAX-12CV-R and MAX-12CV-RX are
high-perfomance engines for 1/10 class
R/C racing cars. There are two verions, the
one with 10E-R carburettor and the other
with 10C carburettor. The MAX-12CV-R
has a conventional crankshaft, while the
MAX-12CV-R(P) employs a special
crankshaft with integral pilot shaft.
NOTE:
With this engine, the piston will feel tught at
the top of its stroke when the engine is cold.
This is normal. The piston and cylinder are
designed to achieve a perfect running
clearance when they reach their normal
running temperatures.
INSTALLING THE GLOWPLUG
Install washer on glowplug
and insert carefully into
cylinder-head, making sure
that it is not cross-threaded
before tightening firmly.
Glow plug
Washer
BASIC ENGINE PARTS
Carburettor
Crankshaft
6
Drive Hub
Heatsink Heat
Beam Mount
Crankcase
Starter Handle
Recoil Starter
Assembly No.5
INSTALLATION OF THE CARBURETTOR
As delivered, the engine has its carburettor
lightly fit into the intake boss. Secure it as
follows.
Loosen the retainer screw, rotate the
1.
carburettor to its correct position and make
sure that it is pressed well down into the
intake boss, compressing the rubber gasket,
before retightening screw.
Rotate the retainer screw gently until it
2.
stops, then tighten a further 60-90˚.
Do not overtighten the screw as this will
damage the carburettor body.
Rotate the retainer nut
gently until it stops.
Tighten a further 60-90˚
7
ENGINE INSTALLATION
Make sure that the vehicle's engine mounting
surfaces are level and in the same plane. Poor
installation may cause distortion of the
crankcase, bearings, etc., resulting in erratic
running and loss of performance.
The recommended screws for securing the
engine are 3mm or 4-40 steel Allen hexagon
socket type.
If existing holes in the engine mount do not align
perfectly with engine mounting lugs, enlarge
them slightly with a needle-file so that screws
enter vertically.
Chassis
Chamfer inside edges of bearers.
Avoid forcing the screws. Secure with locknuts.
If the bottom of the recoil starter housing would
otherwise touch the car chassis, fit the engine
mount spacers (supplied) between the engine's
mounting lugs and the engine mount. Use the
M3x15 screws provided. With some vehicles, it
may be necessary to make minor trimming
modifications to chassis or body when fitting the
engine.
NOTE:
Where spacers are supplied joined in pairs
(see sketch) separate them as shown.
Either face may be placed downwards.
Mount Spacer
Separate
Engine Mount
Engine Mount Spacer
AIR CLEANER TYPE 102
This is a heavy-duty wet type air cleaner that has
been developed specifically for the O.S. MAX-CV
series model car engines.
It contains specially impregnated filter elements which
prevent highly damaging dust and dirt from being
drawn into the engine through the carburettor, yet
allow engine performance to be maintained for longer
periods between element renewals. The Type 102 air
cleaner has a special rubber body which facilitates
easy yet secure fitting, with positive sealing at the
carburettor air intake.
INSTALLATION OF AIR CLEANER
Carefully clean the carburettor,
•
removing any old adhesive or
sealant that may have been
previously used on the outside
of the air intake.
Press the air cleaner body firmly
•
over the carburettor air intake. Make sure that the
outer rim of the air intake engages the internal
annular groove in the air cleaner: failure to do so
may result in the air cleaner falling off. See sketch,
right.
8
Position the air cleaner correctly, so that it does not
•
foul the cylinder-head or obstruct the needle-valve.
AIR CLEANER ELEMENTS
Replacement elements
•
are already impregnated
with filter oil. As this oil is
very sticky, take cere,
when handling elements
to prevent dust or dirt
from adhering them. If
your fingers become
contaminated, wash them with soap and water.
During storage, the oil may have become unevenly
•
dispersed through the elements. This will be indicated
if the blue color of the element material appears patchy.
In this case, place the elements in a small plastic bag
and gently rub them between finger and thumb to
redistribute the oil.
Lower Filter
Element
Insert beneath flanges.
Upper Filter
Element
REPLACEMENT OF ELEMENTS
It is advisable to replace the upper filter element with
•
a new one after not more than one hour of running
time. It is not necessary to discard the lower element
so frequently, but be sure to change it when it
becomes soiled.
Always remove contaminated elements carefully, to
ensure that dirt cannot enter the carburettor.
AIR CLEANER TYPE 102S
It has a single filter element and is intended primarily
for circuit racing, where conditions are less damaging
than the very dusty, loose surfaces of off-road operation
for which the double-element Type 101 and 102 Air
Cleaners are recommended.
The lower height of the Super Air-Cleaner 102S also
facilitates easier installation in cars where available
space may be restricted.
INSTALLATION OF AIR CLEANER
Carefully clean the carburettor,
•
removing any old adhesive or
sealant that may have been
previously used on the outside
of the air intake.
Press the air cleaner body firmly
•
over the carburettor air intake. Make sure that the
outer rim of the air intake engages the internal
annular groove in the air cleaner: failure to do so
may result in the air cleaner falling off.
9
Position the air cleaner correctly, so that it does not
•
foul the cylinder-head or obstruct the needle-valve.
INSTALLING THE FILTER ELEMENT
The element is already impregnated with a special
•
filter oil. As this oil is very sticky, take care, when
handling it, to prevent dust or dirt from adhering to the
element. If your fingers become contaminated, wash
them with soap and water.
During storage, the oil may
•
have become unevenly
dispersed through the element.
This will be indicated if the blue
colour of the element material
appears patchy. In this case,
place the element in a small
plastic bag and gently rub it
between finger and thumb to
redistribute the oil.
Insert beneath flange
REPLACEMENT OF ELEMENT
It is advisable to replace the filter element with a new
•
one after not more than one hour of running time.
Always remove contaminated elements carefully, to
ensure that dirt cannot enter the carburettor.
NOTES CONCERNING THE RECOIL STARTER
REMINDER!
Do not attempt to disassemble the recoil
◆
starter. If you do so, the very strong
spring inside will be suddenly ejected.
This can be very dangerous.
◆
Do not extend the starter cord more than
45cm(18"). Do not abruptly release the
operating handle. Allow the cord to rewind
smoothly while still holding the handle.
◆
Pull the operating handle straight out
when starting the engine, so that the cord
does not rub against the vehicle body or
engine.
◆
This will help prevent the cord from being
damaged by abrasion or engine heat.
Try to avoid spilling fuel over the starter
◆
unit and its cord. Some fuels have a
detrimental effect on these parts.
10
( 12CV-RX ONLY)
The starter prevents the engine from being
◆
rotated in the wrong direction.The unit will
be damaged if you attempt to force the flywheel in the opposite direction (i.e. clockwise when viewed from the crankshaft end).
NOTE:
Because, in the interests of personal safety,
dismantling of the starter mechanism is
strongly discouraged, the Recoil Starter is
available for replacement only as a preassembled unit.
However, some related parts, such as
Starting Shaft and Rear Adaptor, are
obtainable separately. (See Parts List.)
GLOWPLUG
Since the compatibility of glowplug and fuel may have
a marked effect on performance and reliability, it may
be worthwhile to choose the R/C type plug found
most suitable after tests.Recommended O.S. plugs
are No.8, A5 and A3. Carefully fit plug finger-tight,
before final tightening with the correct size plug
wrench.
The role of the glowplug
With a glowplug engine, ignition is initiated by the
application of a 1.5-volt power source. When the
battery is disconnected, the heat retained within the
combustion chamber remains sufficient to keep the
plug filament glowing, thereby continuing to keep the
engine running. Ignition timing is 'automatic' : under
reduced load, allowing higher rpm, the plug becomes
hotter and, appropriately, fires the fuel/air charge
earlier; conversely, at reduced rpm, the plug become
cooler and ignition is retarded.
Glowplug life
Particularly in the case of very high performance
engines,
glowplugs must be regarded as expendable
However, plug life can be extended and engine
performance maintained by careful use, i.e.:
Install a plug suitable for the engine.
•
Use fuel containing a moderate percentage of
•
nitromethane unless more is essential for racing
events.
Do not run the engine too lean and do not leave the
•
battery connected while adjusting the needle.
11
When to replace the glowplug
Apart from when actually burned out, a plug may
need to be replaced because it no longer delivers its
best performance, such as when:
Filament surface has roughened and turned white.
•
Filament coil has become distorted.
•
Foreign matter has adhered to filament or plug
•
body has corroded.
Engine tends to cut out when idling.
•
Starting qualities deteriorate.
•
TOOLS, ACCESSORIES, etc.
The following items are necessary for operating the
engine.
FUEL
Use only top quality methanol-based model engine
fuel.For consistent performance and long engine life,
it is advisable to use fuel containing AT LEAST 18%
lubricant. This engine is designed to run on both low and
high nitromethane content fuels,i.e. from mild mixtures
containing a few percent of nitromethane, up to highspeed racing fuels containing 40%,nitromethane.
Generally, power output is increased
point-as the nitromethane content of the fuel is increased.
-
up to a certain
As a starting point, we recommend a fuel containing
10-20% nitromethane, changing to a fuel containing
more nitro only if necessary. When the nitro content of
the fuel is increased or the brand of fuel is changed, it
is advisable to initially run the engine with a richer
needle-valve setting, so that the optimum setting for
the new fuel may be rechecked as described in the
RUNNING-IN paragraphs. When engines are run at
very high speeds and on high-nitro fuels, glowplug
elements do not last so long.
Reminder!
Model engine fuel is poisonous. Do not
allow it to come into contact with the eyes or
mouth. Always store it in a clearly marked
container and out of the reach of children.
Model engine fuel is also highly flammable.
Keep it away from open flame, excessive heat,
sources of sparks, or anything else which
might ignite it.
ELECTRIC STARTER AND STARTER BATTERY
Use a 12-volt electric starter
with suitable battery for starting the engine.(12CV-R/R(P))
12
BATTERY INTEGRATED GLOWPLUG HEATER
Commercialy available handy
glowplug heater in which the
glowplug battery and battery
leads are integrated.
FUEL PUMP
For filling the fuel tank, a simple,
polyethylene "squeeze" bottle,
with a suitable spout, is required.
LONG SOCKET WRENCH
Recommended for easy removal
and replacement of the angled
and recessed glowplug, the
O.S.Long Socket Wrench
incorporates a special grip.
SILICONE FUEL LINE
Heatproof silicone tubing of
approx. 5mm o.d. and 2mm i.d.
is required for the connection
between the fuel tank and
engine.
CARBURETTOR CONTROLS (10C
Three adjustable controls are provided on this
carburettor.
•
The Needle-Valve:
For adjusting the mixture strength when the throttle
is fully open.
•
The Mixture Control Screw:
For adjusting the mixture strength at partthrottle and idling speeds, to obtain steady
idling and smooth acceleration to mid speeds.
•
The Throttle Stop Screw:
For setting the minimum idling speed.
NOTE:
Readjustment may
be necessary, occasionally to allow for
changes in fuel formula, gear ratio or
clutch engagement
point.
13
Ball Link
Throttle Stop Screw
Mixture Control Valve
Assembly Screw
Needle Valve
)
CARBURETTOR CONTROLS (10E-R
Three adjustable controls are provided on this
carburettor.
•
The Needle-Valve:
For adjusting the mixture strength when the throttle
is fully open.
•
The Mixture Control Screw:
)
For adjusting the mixture strength at partthrottle and idling speeds, to obtain steady
idling and smooth acceleration to mid speeds.
•
The Throttle Stop Screw:
For setting the minimum idling speed:
NOTE:
Readjustment may
be necessary, occasionally to allow for
changes in fuel, gear
ratio or clutch engagement point.
Throttle
Stop Screw
Mixture Control Valve
Assembly Screw
Needle Valve
PRESSURIZED FUEL SYSTEM
The somewhat violent changes of vehicle attitude
•
that occur in off-road running, combined with the
fact that, in buggy type cars, the fuel tank is often
located some distance from the carburettor, means
that fuel 'head' at the carburettor can vary and upset
running.Therefore,it is recommended that a muffler
pressurized fuel feed system be used.
Never run your vehicle without installing the air
•
cleaner. Dust and dirt that may otherwise be drawn
into the engine will rapidly shorten its life.
Fuel Tank
14
Connect suitable length of
Silicone tubing between fuel
tank and silencer.
Silicone tubing
Silencer
STARTING THE ENGINE & RUNNING-IN ('Breaking-in')
The following procedure is suitable for these engines
when the O.S. T-1020 tuned silencer and a fuel
containing up to 30% nitromethane are used.
Use the same fuel as is to be employed for all initial
•
running and containing NOT LESS THAN 18%
lubricant.
Temporarily remove the glowplug to check that it
•
glows bright red when energized.
Re-check the needle-valve
•
and throttle settings. Turn
the needle-valve clockwise
slowly and gently until it
stops. This is the fully
closed position.Do not use
force to turn the needle-valve beyond this point.
Open the Needle-Valve 2 turns from the fully closed
•
position.
In case of the 10C caburettor
◆
Switch on the transmitter and
•
receiver and set the throttle
very slightly open from the
idling position.
Close
Open
approx 0.3-0.5mm
Needle Valve
In case of the 10E-R caburettor
◆
Set the throttle-stop screw so
•
that the minimum throttle
opening (idle setting) is
approximately 1.0mm.
DO NOT energize glowplug,
•
but apply electric starter to
draw fuel to carburettor.
Now connect glowplug battery
•
lead to heat the plug filament
and start the engine.
In case of the 12CV-RX
■
Push the choke button on
•
the fuel tank several times
to deliver the fuel to the
carburetor. (Do not overprime or the recoil starter
cannot be pulled.)
Pull the starter handle
•
briskly straight out several
times to start the engine.
15
approx 1mm
Throttle Stop Screw
Front
Rear
Rotating
Direction
Starter Handle
Remember!
It is vitally important to set the
throttle at the correct position
before attempting to start the
engine. If the engine is allowed to
run with the throttle too far open
under "no load" conditions, it will
rapidly overheat and may be seriously damaged.
When the engine starts, first allow it to operate in short
•
runs on its very rich starting settings, with the glowplug
battery still connected and with its driving wheels clear
of the ground. The rich mixture will, under these
conditions, provide adequate lubrication and cooling,
indicated by profuse smoke from the exhaust.
Next, disconnect the glowplug battery and try
•
running the car on the track. If the engine stalls,
open the throttle fractionally, but try to keep the
engine running as rich as possible: if it stops
because of being excessively over-rich, close the
Needle-Valve 30˚ and try again.
Run the car on the track until one tank of fuel has been
•
consumed, then close the Needle-Valve 30˚ and run
the car for another full tank of fuel.
Repeat this procedure until 5 more tanks of fuel have
been consumed, during which time the throttle may
be opened for brief bursts of increased power. If the
engine stops at medium speeds, close the Mixture
Screw 45-90˚.
The position of the needle-valve
when starting the engine.
Needle
To stop the engine, close the throttle to idling speed,
•
then shut it off completely with the trim lever on the
transmitter. To cut off the fuel supply, pinch the fuel
delivery tube to the carburettor.
Remember!
If the engine should need to be disassembled (e.g. for
cleaning or minor parts replacement) it is advisable to
return the Needle-Valve to the original rich, starting
setting and check whether further running-in time is
required before the car is raced again. In the event of
any major working parts(e,g, piston/cylinder liner
assembly) being replaced, the complete running-in
should be repeated.
30˚
30˚
30˚
Close the needle-valve approx.
30˚ after running the vehicle for
one full tank of fuel.
Repeat this procedure several
times.
16
IF THE ENGINE FAILS TO START
Check the following:
Glowplug battery discharged or glowplug defunct.
•
Fuel not reaching carburettor.
•
Engine flooded. Do not over-prime. (This could also
•
cause hydraulic lock and damage the engine on
application of the electric starter.)
Remove glowplug, close needle-valve and apply
starter to pump out surplus fuel. At this time cover
the plug hole with waste so that splashing fuel will
not get into your eyes or mouth.
12CV-R/R(P)
12CV-RX
FINAL ADJUSTMENT
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 30˚ 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 30˚.
Having established the optimum Needle-Valve
•
setting, check the Mixture Control Valve setting as
follows.
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 idling mixture is too rich.
17
In this case, turn the Mixture Control Valve
•
clockwise 45~90˚. If, on the other hand, the engine
tends to speed up momentarily and then cut out
abruptly when the throttle is opened,the idling
mixture is too lean. Correct this by turning the
Mixture Control Valve counter-clockwise 45~90˚.
NOTE:
Mixture Control Valve adjustment should be made
in steps of not more than 45~90˚, carefully
checking the effect,on throttle response, of each
small adjustment.
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 Mixture
Control Valve, 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.
With the optimum mixture control position, light
•
smoke is visible during high speed running,and the
engine revolutions increase 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 needle-valve and mixture
control screw very 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 counterclockwise 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 performance.
18
CARBURETTOR CLEANLINESS
The correct functioning of the carburettor depends on its small fuel orifices remaining clear.
■
BALL LINK AND SLIDE VALVE EXTENSION
(In case of the 10C caburettor)
It is seldom necessary to separate the slide-valve
extension from the slide-valve itself. For cleaning,
withdraw this complete sub-assembly from the
carburettor body after removing the slide-valve guide
screw. Then wash with methanol or glow-fuel.
(Note: take care not to lose the guide screw;it is a
special one.) When it is necessary to adjust the balllink position, loosen the ball-link retaining screw with
a 2.5mm hexagon key, re-align the ball-link and retughten the screw firmly.
■
REALIGNMENT OF MIXTURE CONTROL VALVE
In the course of making carburettor 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.Its basic
position can be found by first rotating the Mixture
Control Valve until its slotted head is flush with the
carburettor body. The valve is then screwed in exactly
2.5 turn to re-establish its neutral position.
In case of the 10C caburettor
Carburettor Body
In case of the 10E-R caburettor
Throttle Lever
Carburettor Body
19
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburettor body.
Then screw the valve in exactly
2.5 turn.
This is the standard position.
Mixture Control Valve
First rotate the Mixture Control
Valve until its slotted head is
flush with the carburettor body.
Then screw the valve in
exactly 0.5 turn.
This is the standard position.
Mixture Control Valve
CARE AND MAINTENANCE
1.
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, fitted to the outlet 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
2.
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
3.
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.
Then, inject some after-run oil into the engine, and
4.
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.
Finally, when cleaning the exterior of the engine,
5.
use methanol or kerosene. Do not use gasoline or
any solvent that might damage the silicone fuel
tubing.
Caution:
The rear crankshaft bearing of this engine uses a
special plastic retainer. If the front housing needs
to be heated to remove or replace the bearing, do
not allow the bearing to exceed 120˚C (248˚F),
otherwise it may be damaged and rendered
unserviceable.
20
RACING ENGINE PARTS
O.S. Glow Plug
■
Super Air Cleaner
■
102
102S
101,102 Filter Elements
■
(
72403120
T-1020
■
No.8
A3
A5
(
72403200
(
72403202
)
(
71608001
(
71605300
(
71605100
)
Tuned Silencer
(
72103020
)
■
)
)
)
)
(6pcs.)
■
■
O.S. GENUINE PARTS & ACCESSORIES
10C Automatic
Carburettor
(
Super Joint Tube 15
(
72103310
Crankshaft Clamp
(71530100
1012
21286000
)
)
)
Exhaust Header Pipes
■
For MUGEN MTX
(
72103150
For Kyosho
V-ONE R,S
(
72103160
For Kyosho Spider & HPI Nitro For Tamiya TG10
Long Socket Wrench
■
With Plug Grip
(
71521000
For Kyosho Super10
)
)
)
21
(
72103110
(
72103140
For Tamiya TGX
(
)
)
■
φ3
For Carburettor Nipple
φ7
For T-1020 Tuned
Silencer
φ
For 10C,10E-R
Carburettor
72103120
(
72103130
Dust Cap Set
(
73300305
(
73300712
(
10
73301012
)
)
)
)
)
12CV-R EXPLODED VIEW
C.M2.6x12
1
2
22
✽
Type of screw C…Cap Screw M…Oval Fillister-Head Screw
4
3
5
6
8
7
-
0
Not included in 12CV-R(S)
9
q
=
F…Flat Head Screw N…Round Head Screw S…Set Screw
t
e
C.M2.6x7
r
w
12CV-R ENGINE PARTS LIST
Code No.
1
2 1254 000
2
2 1253 000
3
2 1256 000
2 3817 000
4
5
2 1255 000
6
2 1286 000
7
2 1481 010
8
2 1481 700
9
2 0810 007
2 1408 000
0
-
=
q
w
w
e
r
t
-A
2 2631 020
2 1501 030
2 1230 020
2 1252 000
2 1252 010
2 1214 000
2 1257 000
2 1213 000
23
7 1608 001
7 2403 200
7 2403 210
7 2403 120
7 2403 202
7 2403 212
7 2403 120
The specifications are subject to alteration for improvement without notice.
Heatsink Head
Cylinder & Piston Assembly
Piston Pin
Piston Pin Retainer(2pcs.)
Connecting Rod
Carburettor Complete (Type 10C)
Carburettor Complete (Type 10E-R)
Carburettor Retainer
Propeller Nut
Drive Hub
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Crankshaft (For 12CV-R(S))
Gasket Set
Cover Plate
Screw Set
Glow Plug No.8
Super Air Cleaner 102(W/3 filter elements)[off -road]
102 Cleaner Body
101,102 Filter Elements (6pcs.)
Super Air Cleaner 102S(W/3 filter elements)[on-road]
102S Cleaner Body
101,102 Filter Elements (6pcs.)
Description
12CV-RX EXPLODED VIEW
1
0
Not included in 12CV-RX(S)
C.M2.6x12
y
4
12
7
0
9
r
✽
Type of screw C…Cap Screw M…Oval Fillister-Head Screw
F…Flat Head Screw N…Round Head Screw S…Set Screw
3
5
6
8
=
-
M.+M2.6x7
t
2
w
q
u
-2
u
e
M.+M2.6x7
u
-1
12CV-RX ENGINE PARTS LIST
Description
25
Code No.
2 1254 000
1
2 1253 000
2
3
2 1256 000
2 3817 000
4
5
2 1255 000
6
2 1286 000
7
2 1481 020
8
2 1481 700
9
2 0810 007
2 1408 000
0
-
2 2631 020
2 1501 030
=
q
2 1230 020
w
2 1252 040
w
2 1252 050
-A
e
2 1214 000
r
2 1421 200
2 1421 300
t
y
2 1313 030
7 3003 000
u
7 3003 100
u
-1
7 3003 200
u
-2
7 2404 000
7 1608 001
7 2403 202
7 2403 212
7 2403 120
7 2403 200
7 2403 210
7 2403 120
Heatsink Head
Cylinder & Piston Assembly
Piston Pin
Piston Pin Retainer(2pcs.)
Connecting Rod
Carburettor Complete (Type 10C)
Carburettor Complete (Type 10E-R)
Carburettor Retainer
Propeller Nut
Drive Hub
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Crankshaft (For 12CV-RX(S))
Gasket Set
Starting Shaft
Rear Adaptor
Screw Set
No.5 Recoil Starter Assembly
No.5 Recoil Starter Body
No.5 One-way Clutch
Engine Mount Spacer
Glow Plug No.8
Super Air Cleaner 102S(W/3 filter elements)[on-road]
102S Cleaner Body
101,102 Filter Elements (6pcs.)
Super Air Cleaner 102(W/3 filter elements)[off -road]
102 Cleaner Body
101,102 Filter Elements (6pcs.)
The specifications are subject to alteration for improvement without notice.
12CV-R(P) EXPLODED VIEW
C.M2.6x12
1
26
4
3
6
7
9
8
Type of screw C…Cap Screw M…Oval Fillister-Head Screw
✽
F…Flat Head Screw N…Round Head Screw S…Set Screw
2
5
0
w
=
C.M2.6x7
q
-
12CV-R(P) ENGINE PARTS LIST
Code No.
2 1254 000
1
2 1253 000
2
3
2 1256 000
2 3817 000
4
5
2 1255 000
2 1286 000
6
2 1481 700
7
2 2631 020
8
27
9
0
-
=
q
w
2 1501 030
2 1230 020
2 1252 020
2 1214 000
2 1257 000
2 1213 000
7 1608 001
7 2403 202
7 2403 212
7 2403 120
The specifications are subject to alteration for improvement without notice.
Heatsink Head
Cylinder & Piston Assembly
Piston Pin
Piston Pin Retainer(2pcs.)
Connecting Rod
Carburettor Complete (Type 10C)
Carburettor Retainer
Crankshaft Ball Bearing (Front)
Crankcase
Crankshaft Ball Bearing (Rear)
Crankshaft
Gasket Set
Cover Plate
Screw Set
Glow Plug No.8
Super Air Cleaner 102S(W/3 filter elements)
102S Cleaner Body
101,102 Filter Elements (6pcs.)
Description
10C CARBURETOR EXPLODED VIEW & PARTS LIST
3
2
1
-1
1
✽
Type of screw
C…Cap Screw M…Oval Fillister-Head Screw
F…Flat Head Screw N…Round Head Screw S…Set Screw
-1
3
4
1
-2
0
5
6
7
C.M3.5x8
8
No.
Code No.
1
2 1285 600
1
4 6066 319
-1
1
2 2781 800
-2
2
2 1285 640
3
2 1285 901
2 7881 820
3
-1
4
2 1286 100
5
2 1285 220
6
2 1286 200
7
2 1286 400
8
2 1881 320
9
2 3818 420
0
2 2615 000
The specifications are subject to alteration for improvement
9
without notice.
Mixture Control Valve Assembly
Throttle Stop Screw
Needle Valve Assembly
Carburetor Body
Slide Valve Guide Screw
Slide Valve
Metering Needle Assembly
Dust Cover
Ball Link No.4
Carburettor Rubber Gasket
Description
"O" Ring(L) (2pcs.)
"O" Ring(S) (2pcs.)
"O" Ring (2pcs.)
28
10E-R CARBURETTOR EXPLODED VIEW & PARTS LIST
No.
Code No.
1
0
-1
9
6
7
-1
-
7
1
-1
2
1
3
4
5
7
0
0
-2
8
-2
2 1481 600
1
2 7881 820
-1
2
2 1481 420
3
2 2681 419
4
2 1283 210
5
2 1481 200
6
2 2481 506
7
2 1283 962
7
-1
2 4881 824
7
-2
2 1283 961
8
2 1481 120
9
2 2681 310
0
2 1481 900
0
-1
2 7881 820
0
-2
2 1481 950
-
2 2615 000
The specifications are subject to alteration for improvement
without notice.
Mixture Control Screw
Throttle Lever Fixing Nut
Throttle Lever
Dust Cover
Carburettor Rotor
Rotor Spring
Nozzle Assembly
Carburettor Body
Throttle Stop Screw
Needle Valve Assembly
Carburettor Rubber Gasket
Description
"O" Ring (2pcs.)
"O" Ring
Locknut
"O" Ring (2pcs.)
Fuel Inlet
29
12CV-R THREE VIEW DRAWING Dimensions(mm)
SPECIFICATIONS
Displacement
■
Bore
■
Stroke
■
Practical R.P.M.
■
Power output
■
Weight
■
2.11 cc(0.129cu.in.)
14.0 mm(0.551in.)
13.7 mm(0.539in.)
4,000
~
36,000 r.p.m.
1.0 bhp / 31,000 r.p.m.
200g(7.05oz.)
25
39
M5x0.8
70.9
12.8
83.7
30
27.5
41
15
70
11
31.4
25
12CV-RX THREE VIEW DRAWING Dimensions(mm)
SPECIFICATIONS
Displacement
■
Bore
■
Stroke
■
Practical R.P.M.
■
Power output
■
Weight
■
2.11 cc(0.129cu.in.)
14.0 mm(0.551in.)
13.7 mm(0.539in.)
4,000
~
36,000 r.p.m.
1.0 bhp / 31,000 r.p.m.
258g(9.10oz.)
40
M5x0.8
41
31
88.8
27.5
33.8
11
31.4
70.9
90.9
25
20
12CV-R(P) THREE VIEW DRAWING Dimensions(mm)
SPECIFICATIONS
Displacement
■
Bore
■
Stroke
■
Practical R.P.M.
■
Power output
■
Weight
■
2.11 cc(0.129cu.in.)
14.0 mm(0.551in.)
13.7 mm(0.539in.)
4,000
~
36,000 r.p.m.
1.0 bhp / 31,000 r.p.m.
198g(6.99oz.)
25
39
UNF1/4-28
70.9
83.7
12.8
32
79.3
34.8
27.5
15
11
31.4
25
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Copyright 2000 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.
I
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&
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F
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6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan
URL : http://www.os-engines.co.jp
TEL. (06) 6702-0225
FAX. (06)6704-2722
070101
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