It is of vital importance, before attempting to
operate your engine, to read the general
'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-4 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 aircraft, radio control equipment, etc.,
are accessible for checking at the same time.
CONTENTS
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE
INTRODUCTION, BEFORE INSTALLING THE ENGINE
BASIC ENGINE PARTS
INSTALLATION OF THE ENGINE,
THROTTLE LINKAGE
INSTALLATION OF SILENCER (MUFFLER)
FUEL TANK LOCATION
GLOWPLUGS, FUEL
PROPELLER, MIXTURE CONTROLS
STARTING
RUNNING-IN ("Breaking-in")
MIXTURE CONTROL ADJUSTMENT CHART
2-4
5
6
7
7-8
9
9-10
10-11
12
MIXTURE CONTROL VALVE ADJUSTMENT,
REALIGNMENT OF MIXTURE CONTROL VALVE,
SUBSEQUENT STARTING PROCEDURE
SUBSEQUENT READJUSTMENT,
CARBURETTOR CLEANLINESS.
ENGINE CARE AND MAINTENANCE
VALVE ADJUSTING
O.S. GENUINE PARTS & ACCESSORIES
ENGINE EXPLODED VIEW
ENGINE PARTS LISTS
CARBURETTOR EXPLODED VIEWS &
PARTS LIST, THREE VIEW DRAWING
13
14
15
16
17
18
1
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR
O.S. ENGINE
Remember that your engine is not a " toy ", but a highly
efficient internal-combustion machine whose power is
capable of harming you, or others, if it is misused or
abused. 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 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.
WARNINGS
Never touch, or allow any object to come into
•
contact with, the rotating propeller and do not
crouch over the engine when it is running.
A weakened or loose propeller may disintegrate or be thrown
•
off and, since propeller tip speeds with powerful engines may
exceed 600 feet(180 meters) per second, it will be understood
that such a failure could result in serious injury, (see 'NOTES'
section relating to propeller safety).
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 carbonmonoxide. 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.
2
NOTES
This engine was designed for model aircraft. 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.
Be sure to use the silencer (muffler) supplied with the engine. Frequent exposure to an open exhaust may
•
eventually impair your hearing.
Such noise is also likely to cause annoyance to others over a wide area.
Fit a top-quality propeller of the diameter and pitch specified for the engine and aircraft. Locate the propeller on the
•
shaft so that the curved face of the blades faces forward-i.e. in the direction of flight. Firmly tighten the propeller nut,
using the correct size wrench.
Always check the tightness of the propeller nut and retighten it, if necessary, before restarting the engine,
•
particularly in the case of four-stroke-cycle engines. A safety locknut assembly is provided. Always use it. This will
prevent the propeller from flying off in the event of a "backfire", even if it loosens.
If you install a spinner, make sure that it is a precision made product and that the slots for the propeller blades
•
do not cut into the blade roots and weaken them.
Discard any propeller which has become split, cracked, nicked or otherwise rendered unsafe. Never attempt to
•
repair such a propeller: destroy it. Do not modify a propeller in any way, unless you are highly experienced in tuning
propellers for specialized competition work such as pylon-racing.
Use an electric starter for this engine. The wearing of safety glasses is also strongly recommended.
•
3
NOTES
Take care that the glow plug clip or battery leads do not come into contact with the propeller.
•
Also check the linkage to the throttle arm. A disconnected linkage could also foul the propeller.
After starting the engine, carry out any needle-valve readjustments from a safe position behind the rotating
•
propeller. Stop the engine before attempting to make other adjustments to the carburettor.
Adjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully
•
retarded. Alternatively, the engine may be stopped by cutting off the fuel supply. Never try to stop the engine
physically.
Take care that loose clothing (ties, shirt sleeves, scarves, etc.) do not come into contact with the propeller.
•
Do not carry loose objects (such as pencils, screwdrivers, etc.) in a shirt pocket from where they could fall through
the propeller arc.
Do not start your engine in an area containing loose gravel or sand. The propeller may throw such material in your
•
face and eyes and cause injury.
For their safety, keep all onlookers (especially small children) well back (at least 20 feet or 6 meters) when preparing
•
your model for flight. If you have to carry the model to the take-off point with the engine running, be especially
cautious. Keep the propeller pointed away from you and walk well clear of spectators.
Warning! Immediately after a glowplug-ignition engine has been run and is still warm, conditions sometimes exist
•
whereby it is just possible for the engine to abruptly restart if the propeller is casually flipped over compression
WITHOUT the glowplug battery being reconnected. Remember this if you wish to avoid the risk of a painfully rapped
knuckle!
4
INTRODUCTION
•
This engine is ideally suited to a variety of R/C
aircraft,including sports, aerobatic and scale types.
A separate precision-made needle-valve unit is installed at
•
the rear, where manual adjustment is safely remote from the
rotating propeller.
An effective low-loss E-5010 silencer is supplied.
•
BEFORE INSTALLING THE ENGINE
In addition to the general tools, the following tools are
convenient to use.
10mm wrench to secure nuts, preferably 2 pcs.
•
•
14-17mm open end wrench
Large capacity electric starter and battery
•
Hex wrench to secure the silencer (supplied with the engine)
•
INSTALLING THE GLOW PLUG
Carefully insert plug, with washer,
fingertight only, before final tightening with
the correct size plug wrench.
Glow plug
INSTALLING THE REMOTE NEEDLE
Install the remote needle to the attachment bracket as shown
•
in the right.
First, make sure that nut A and B are secured using a 10mm
•
wrench. Then, fit the remote needle to the attachment bracket,
and tighten nut A and C.
Connect the needle-valve to carburettor jet nozzle with silicone
•
tubing supplied. In the event of the tubing becoming damaged,
it should be replaced with 78mm length of 5mm ODx2mm ID
silicone tubing.
Washer
BASIC ENGINE PARTS
Cylinder Head
Carburettor Type 60F
Crankcase
Drive Hub
Propeller Washer
Propeller Nut
Lock Nut
Crankshaft
Glow plug No.8
Remote Needle
Valve Bracket
C
Remote Needle
Beam Mount
Silicone tubing
B
A
Cover Plate
5
INSTALLATION OF THE ENGINE
NOTE: Be sure to secure large enough air intake and
outlet area for cooling the engine in order not to overheat
the engine.
Installation in the model
A typical method of beam
mounting is shown below, left.
Rigid hardwood
(e.g. maple)
At least
15mm(1/2")
Make sure that the mounting beams are parallel and that their
top surfaces are in the same plane.
CORRECT
Front view
Top surfaces are in the same plane.
INCORRECT
Top surfaces are not in the
same plane.
Re-align the surfaces as necessary
At least 15mm(1/2")
Side view
Opposite beam
Top surfaces are not in the
same plane.
Engine does not rest firmly.
How to fasten the mounting screws.
5mm steel nut
Spring washer
or lock washer
Steel washer
Hardwood mounting beams
Use mounting screws of a diameter (between 5mm appropriate to engine size.
Tighten second nut firmly
down onto first nut.
Tighten this nut first.
Hardwood such as
cherry or maple.
5mm steel screw
Radial motor mount
(cast aluminum)
5mm steel Allen
screw
Spring washer
THROTTLE LINKAGE
Before connecting the throttle-lever /servo linkage, make
•
sure that no part of the linkage interferes with the internal
structure of the aircraft or wiring, etc., when the throttle is
fully open or fully closed.
•
Set the throttle lever linkage so that the throttle rotor is (a)
fully open when the transmitter throttle stick is fully
advanced and (b) fully closed when the throttle stick is fully
retarded. Adjustment of the throttle rotor opening at the
idling position can then be made with the throttle trim lever
on the transmitter. (Select throttle-lever and servo-horn
hole positions that will avoid excessive pushrod travel
causing the throttle to bind at either end.)
Note:
When adjusting the throttle lever angle, relative to the
rotor,hold the rotor at about half-way between the open
and closed positions while loosening and tightening the
fixing screw, otherwise the rotor, rotor guide
screw,throttle stop screw or carburettor body may
become burred and damaged.
6
INSTALLATION OF SILENCER(MUFFLER
To fit the standard silencer
1.
Fix the exhaust adaptor plate to the engine with the two M5
x15 Allen screws supplied.
2.
Now fit the silencer to the exhaust adaptor with M5x20
Allen screws, also provided.
NOTE:
In order to prevent the leakage of exhaust oil from
between the engine and adaptor, and between the
adaptor and silencer, apply a suitable silicone sealant to
the joint faces during assembly.
The angled exhaust outlet is agjustable and can be rotated to
any desired position in the following manner.
1.
Loosen locknut and assembly screw.
Set the exhaust outlet at the required angle by rotating the
2.
rear part of the silencer.
Re-tighten the assembly screw, followed by the locknut.
3.
)
FUEL TANK LOCATION
For installation in the model a 450-550cc tank is Suggested.
These will allow 10-12 minute flights.
Locate the fuel tank so that the top of the tank is 5-10mm
(1/4-3/8") above the level of the needle-valve.
Be sure to use a pressurized fuel system by connecting the
•
muffler pressure nipple to the vent-pipe of the fuel tank.
Attention to tank height
FUel level
10mm
Lock nut
Exhaust Outlet
Turn to required position
Assembly screw
Exhaust adaptor
M5x15
GLOWPLUGS
Since the compatibility of glowplug and fuel may have a
marked effect on performance and reliability, it would be
worthwhile to try different heat range glowplugs.
Recommended O.S. plugs are Nos. 8, A5 and A3.
Carefully install the plug finger-tight, before final tightening
with the correct size plug wrench.
M5x20
7
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 items.
However, plug life can be extended and engine performance
maintained by careful use, i.e.:
Fit 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.
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.
•
FUEL
Select, by practical tests, the most suitable fuel from among
the best quality fuels available in your country for model use.
For the best performance, a fuel containing 5% to 20% nitromethane is preferable. Lubricants may be either castor-oil or a
suitable synthetic oil ( or a blend of both ) provided that they
are always of top quality.
For consistent performance and long engine life, it is essential
to use fuel containing AT LEAST 18% lubricant by volume.
Some fuels containing coloring additives tend to deteriorate
and may adversely affect running qualities.
Once a satisfactory fuel has been selected and used for a
while, it may be unwise to needlessly change the brand or
type. In any engine, a change of fuel may cause carbon deposits in the combustion chamber or on the piston head to become detached and lodged elsewhere, with the risk of this
causing unreliable operation for a while. If, however, the
adoption of a different fuel is unavoidable, check the engine
for the first few flights on the new fuel, by temporarily reverting
to the running-in procedure.
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.
8
PROPELLER
The suitability of the prop depends on the size and weight of
the model and type of flying. Determine the best size and type
after the engine has been run in. Check the balance of the
propeller before installing on the engine. Unbalanced
propellers cause vibration and loss of power. Wooden
propellers are to be preferred. Some nylon propellers are not
strong enough to withstand the high power output of these
engines and a thrown blade can be very dangerous.
Aerobatic
15✕12~14, 16✕10~14,
16.5✕10
~
13
Never touch, or allow any object to come into
contact with, the rotating propeller and do not
crouch over the engine when it is running.
17✕10
Sport
~
13, 18✕10~12
MIXTURE CONTROLS
Two mixture controls are provided on these engines.
•
The Needle Valve
When set to produce maximum
power at full throttle, this
establishes the basic fuel/air
mixture strength. The correct
mixture is then maintained by the
carburettor's built-in automatic
mixture control system to cover
the engine's requirements at
reduced throttle settings.
Throttle Lever
Mixtire Control Screw
The Mixture Control Valve (carburettor)
This meters fuel flow at part-throttle and idling speeds to
•
ensure reliable operation as the throttle is opened and
closed. The Mixture Control Valve is factory set for the
approximate best result. First run the engine as received
and readjust the Mixture Control Screw only if necessary.
STARTING
Install an appropriate propeller and tighten securely.
1.
Ream the propeller boss to 9.6mm bore, then check that
2.
the propeller is accurately balanced.
To facilitate electric starting, fit an spinner for centring the
rubber drive insert of the starter.
First tighten 17mm nut securely with a wrench, then tighten
14mm nut securely. Alternatively, a good quality spinner,
enclosing the propeller boss, may be used, but make sure
that it is of precision-made and sturdy construction so that
the spinner shell cannot loosen when the starter is used.
Close the throttle.
Fill the fuel tank. Do not allow fuel to overflow into the
3.
silencer, otherwise the engine may become flooded and
difficult to start.
Check that the needle-valve is closed. (Do not overtighten.)
4.
Now open the needle-valve 2-2 turns from the fully closed
position and temporarily set the throttle in the fully open
position.
Mark
Open
Turn needle-valve clockwise to close
(for leaner mixture)
Close
Turn needle-valve counter-clockwise to
open (for richer mixture)
1
2
9
5. Open the throttle approx. one-quarter.
(This is to avoid unnecessarily
high r.p.m. when the engine
starts.)
Fully closed position
1/4
6.
Connect battery leads to glowplug.
Bring electric starter into contact with spinner and depress
7.
Fully opened position
3/4
Set at this point
starter switch for one or two seconds. Repeat if necessary.
When the engine starts, withdraw the starter immediately.
Attention :
Do not choke the carburettor air intake when applying the
starter. This could cause an excessive amount of fuel to be
drawn into the cylinder which may initiate an hydraulic lock
and damage the engine.
If the engine does not start within 10 repeat applications of
the starter, remove the glow-plug, check that it glows brightly
and that the cylinder is not flooded with fuel. (To eject excess
fuel, close needle-valve and apply starter with glowplug
removed.) Then try again.
When the engine starts, advance the throttle stick slowly
8.
checking the increase of r.p.m. Abrupt throttle operation
right after starting may cause the engine to stumble or stop.
VERY IMPORTANT!
Before being operated at full power (i.e. at full-throttle and with the
needle-valve closed to its optimum setting) the engine must be
adequately run-in, otherwise there is a danger of it becoming
overheated and damaged. (See RUNNING-IN ["Breaking-in"] .)
RUNNING-IN ("Breaking-in")
All internal-combustion engines benefit from extra care when
they are run for the first few times -known as running-in or
breaking-in. This is because the working parts of a new engine
take some time to settle down after being subjected to high
temperatures and stresses. Therefore, it is vitally important to
complete the break-in before allowing the engine to run
continuously at high speed and before finalizing carburettor
adjustments. However, because O.S. engines are produced
with the aid of the finest modern precision machinery and
from the best and most suitable materials, only a short and
simple running-in procedure is called for and can be carried
out with the engine installed in the model.
The process is as follows.
1.
Install the proper propeller intended for your model. Open
the needle-valve 2-2 to turns from the fully closed position
and start the engine. Run the engine for two to three
minutes with the throttle fully open, but with the needlevalve adjusted for rich, slow "four-cycle"operation.
Now close the needle-valve until the engine speeds up to
2.
"two-cycle"operation and allow it to run for about 10
seconds, then reopen the needle-valve to bring the engine
back to "four-cycle"operation and run it for another 10
seconds. Repeat this procedure until the fuel tank is empty.
Refer to IDLING ADJUSTMENT section and fix the idling
3.
position where the lowest possible r.p.m., with steady
running, is obtained.
Re-start and adjust the needle-valve so that the engine just
4.
breaks into "two-cycle" from "four-cycle" operation, then
make three or four flights, avoiding successive "nose-up"
flights.
10
1
2
During subsequent flights, the needle-valve can be
5.
gradually closed to give more power.
However, if the engine shows signs of running too lean, the
next flight should be set richer. After a total of ten to fifteen
flights, the engine should run continuously, at its optimum
needle-valve setting, without loss of power.
◆
Optimum Needle setting (1)
Slowly advance the throttle to its fully open position, then
gradually close the needle-valve until the exhaust note
begins to change.
At this point, disconnect the battery from the glowplug,
taking care that the battery leads or glowplug clip do not
come into contact with the rotating propeller. If the engine
stops when the battery is disconnected, close the needlevalve about 30˚ and restart.
◆
Optimum Needle setting (2)
As the needle-valve is closed slowly and gradually, the
revolutions of the engine will be increased and a
continuous high-pitched exhaust note, only, will be heard.
Close the needle-valve 10-15˚ and wait for the change of
r.p.m.
After the revolutions of the engine are increased, turn the
needle-valve another 10-15˚ and wait for the next change
of r.p.m. As the speed of the engine does not instantly
change with needle-valve readjustment, small movements,
with pauses between, are necessary to arrive at the
optimum setting.
Needle-valve adjustment diagram
◆
6
Clear, high-pitched two-stroke
exhaust note
5
Intermittent, high-pitched
two-stroke note
superimposed
on low "four-stroke"
sound.
4
Disconnect battery
leads from glowplug at
about this point.
3
Exhaust note starts to change.
Practical best(optimum) needle-valve setting
E
n
s
t
o
20
~
7
45˚
Maximum rpm
setting("Lean").
1
STARTING
t
t
r
e
"Rich" needle-valve
a
d
t
s
setting when starting
o
t
s
.
the engine.
n
e
o
s
i
t
a
u
e
l
r
o
c
v
e
e
d
R
o
g
e
i
n
s
p
t
2
The engine may stop if
the battery leads are
disconnected from the
glowplug while the
engine is running rich.
Note: Although this is a two-stroke engine it fires like a
four-stroke at these rich needle-valve settings-i.e. ignition
of the fuel charge takes place at every fourth stroke of the
piston instead of at every second stroke.
Note :
This diagram is for reference purposes only.
Actual needle positions may differ from those
shown.
To stop the engine, close the throttle completely to cut off
•
fuel/air supply.
11
MIXTURE CONTROL ADJUSTMENT CHART
12
Make sure that the throttle is
fully open.
Re-set the idling position at
a little higher r.p.m.
Engine stops.
Continue running at high speed
for 10 seconds.
Start the engine.
Adjust the neede-valve.
Close the throttle gradually.
Find the idling position.
Fix the idling position.
Open the throttle fully.
Does the engine
regain full power?
Close the throttle.
Disconnect the battery
leads at mid speed.
20-30˚ open from maximum
r.p.m. setting.
The position where the lowest
possible r.p.m. ,with steady
running, is obtained.
Set the throttle opening by
means of the throttle trim on
the transmitter so that the lowest
practical speed, without risk of
the engine stopping,is obtained.
Yes.
Run at idling speed for 5 seconds.
Engine stops.
Engine stops.
Refer to the next section.
Does the engine stop?
Apply full throttle.
Does the engine
regain full power immediately?
OK
No.
Yes.
MIXTURE CONTROL VALVE ADJUSTMENT
With the engine running, close the throttle and allow it to idle
for about five seconds, then open the throttle fully. If, at this
point, the engine is slow to pick up and produces an excess of
exhaust smoke, the mixture is too rich. Correct this condition
by turning the Mixture Control Screw clockwise 15-30˚. If the
mixture is excessively rich, engine rpm will become unstable:
opening the throttle will produce a great deal of smoke and
rpm may drop suddenly or the engine may stop. This
condition may also be initiated by excessively prolonged
idling.
If,on the other hand, the mixture is too lean, this will be
indicated by a marked lack of exhaust smoke and a tendency
for the engine to cut out when the throttle is opened. In this
case, turn the Mixture Control Screw counter-clockwise 90˚to
positively enrich the idle mixture, then turn the screw
clockwise gradually until the engine regains full power cleanly
when the throttle is reopened.
Carry out adjustments patiently until the engine responds
quickly and positively to the throttle control.
Note: Mixture Control Valve adjustments should be made
in steps of 15-30˚ initially, carefully checking the
effect, on throttle response, of each small
adjustment.
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 setting can be re-established as follows:
Close the throttle rotor gradually from the fully opened position until it is just fully closed. (Do not turn further.) Then,
screw in the Mixture Control Screw until it stops. Now unscrew the Mixture Control Screw approx. 2 turns.
1
2
SUBSEQUENT STARTING PROCEDURE
Once the optimum needle-valve setting has been established
(see page 19, Needle-valve adjustment diagram) the
procedure for starting may be simplified as follows.
Open the needle-valve one half-turn (180°) from the
1.
optimum setting.
Set the throttle one-quarter open from the fully closed
2.
position, energize the glowplug and apply the electric
starter. When the engine starts, re-open the throttle and readjust the needle-valve to the optimum setting.
Note:
When re-starting the engine on the same day, provided
that atmospheric conditions have not changed significantly, it may be practicable to re-start the engine on its
optimum(running) setting.
13
SUBSEQUENT READJUSTMENT
Once the engine has been run-in and the controls properly
set up, it should be unnecessary to alter the mixture settings;
except to make minor adjustments to the Needle-Valve
occasionally, to take account of variations in climatic
conditions. The use of a different fuel, however, particularly
one containing more, or less, nitromethane and/or a different
type or proportion of lubricating oil, is likely to call for some
readjustment of the Needle-Valve. Remember that, as a
safety measure, it is advisable to increase the Needle-Valve
opening by an extra half-turn counter-clockwise, prior to
establishing a new setting. The same applies if the silencer
type is changed. A different silencer may alter the exhaust
pressure applied to the fuel feed and call for a revised
Needle-Valve setting. The use of a different glowplug may
also require compensating carburettor readjustments.
CARBURETTOR CLEANLINESS
The correct functioning of the carburettor depends on its small
fuel orifices remaining clear. The minute particles of foreign
matter that are present in any fuel, can easily partially obstruct
these orifices and upset mixture strength so that engine performance becomes 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 needle-valve. Do not forget to clean the
filters regularly to remove dirt and lint that accumulate on the
filter screen. Also, clean the carburettor itself occasionally.
ENGINE CARE AND MAINTENANCE
At the end of each operating session, drain out any fuel that
1.
may remain in the fuel tank.
Next, energize the glowplug and try to restart the engine to
2.
burn off any fuel that may remain inside the engine. Repeat
this procedure until the engine fails to fire. Remove the
glowplug and eject any residue by rotating the engine with
an electric starter for 4 to 5 seconds while the engine is still
warm.
Finally, inject some corrosion inhibiting after-run oil into the
3.
engine. Rotate the engine a few times by hand, to make
sure that it is free, and then with an electric starter for 4 to 5
seconds to distribute the oil to all the working parts.
Note:
Do not inject corrosion inhibiting after-run oil into the
carburettor as this may cause the O-ring inside the carburettor to deteriorate.
These procedures will reduce the risk of starting difficulties
and of internal corrosion after a period of storage.
14
GENUINE O.S. PARTS & ACCESSORIES
RADIAL MOTOR MOUNT
O.S. GLOW PLUGS
■
No.8
(71608001)
A5
(71605100)
■
(71920000)
PROPELLER LOCKNUT SET
■
FOR TRUTURN SPINNER
(29310110)
BOOSTER TERMINAL KIT
■
(72200130)
SUPER FILTER
■
(72403050)
LOCK WASHER
■
M5
(55500004)
BUBBLE ELIMINATING
■
TANK WEIGHT
(71531000)
(10Sets )
15
LONG SOCKET WRENCH
■
WITH PLUG GRIP
(71521000)
ENGINE EXPLODED VIEW
C.M3✕18
1
2
3
16
6
5
8
-1
8
8
-2
N.M3.5✕6
q
=
-
0
9
r
t
4
7
e
0
-1
w
C.M3.5✕10
i
y
u
-5
u
S.M3
✕3
u
-2
u
-4
-3
u
-1
✽ Type of screw
C…Cap Screw F…Flat Head Screw N…Round Head Screw S…Set Screw
u
ENGINE PARTS LIST
17
No.
1
2
3
4
5
6
7
8
8
8
9
0
0
-
=
q
w
e
r
t
y
u
u
u
u
u
u
i
-1
-2
-1
-1
-2
-3
-4
-5
Code No.
29604000
29603100
29603400
29603200
29606000
28117000
29405000
29581000
29015019
25081700
29610100
29608000
45508200
29320000
46231000
29601000
29630000
29602000
29614000
29607000
71704240
28282000
28281970
24981837
26381501
26711305
46181950
29613000
71608001
29325000
29325300
29325400
29326000
Description
Cylinder Head
Cylinder Liner
Piston Ring
Piston
Piston Pin
Piston Pin Retainers (2pcs.)
Connecting Rod
Carburettor (Type 60F)
Carburettor Gasket
Carburettor Fixing Screw (2pcs.)
Propeller Lock Nut Set
Drive Hub
Woodruff Key
Thrust Washer
Crankshaft Ball Bearing (F)
Crankcase
Crankshaft Ball Bearing (R)
Crankshaft
Gasket Set
Cover Plate
Remote Needle Valve Bracket
Remote Needle Valve Assembly
Needle
"O" Ring (2pcs.)
Set Screw
Ratchet Spring
Fuel Outlet
Screw Set
Glow Plug No.8
E-5010 Silencer Assembly
Fixing Screw
Pressure Fitting
Exhaust Adaptor
Specifications are subject to alteration for improvement without notice.
CARBURETTOR EXPLODED VIEW &
PARTS LIST
✽
Type of screw
C…Cap Screw F…Flat Head Screw N…Round Head Screw S…Set Screw
No.
1
2
3
3
-1
3-2
4
5
6
7
8
Specifications are subject to alteration for improvement without notice.
N.+M3✕6
1
Code No.
27881400
29581200
45582300
46066319
24881824
29581100
45581820
22681953
29015019
25081700
4
2
-1
3
N.M3.5✕6
-2
3
3
8
7
Description
Throttle Lever Assembly
Carburettor Rotor
Mixture Control Valve Assembly
"O" Ring (L)
"O" Ring (S)
Carburettor Body
Rotor Guide Screw
Fuel Inlet (W/Washer)
Carburettor Gasket
Carburettor Fixing Screw (2pcs.)
5
6
THREE VIEW DRAWING
SPECIFICATIONS
Displacement
■
Bore
■
Stroke
■
Practical R.P.M.
■
Power output
■
Weight
■
50.5
26.23 cc (1.60 cu.in.)
33.6 mm (1.323 in.)
29.6 mm (1.165 in.)
1,800-10,000 r.p.m.
3.7 bhp/9,000r.p.m.
925 g (32.6 oz.)
51.5
74
UNF3/8-24
Dimensions(mm)
65
30
22 22
80
115.5
2-M5
4-Ø5.2
0.8
✕
64
96.7
123.2
18
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Copyright 2000 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.
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6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan
TEL. (06) 6702-0225
FAX. (06) 6704-2722
020102
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