O.S. Engines FS-30S User Manual

It is of vital importance, before attempting to operate your engine, to read the general
'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-6 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,BASIC ENGINE PARTS INSTALLATION INSTALLATION OF CHOKE ROD, NEEDLE VALVE
EXTENSION SILENCER,
LINKAGE OF THROTTLE LEVER BEFORE STARTING FUEL AND PRESSURE LINES
ADVICE ON SELECTION OF FUEL, GLOEPLUG & PROPELLER
ST AR TING THE ENGINE
2-6
10-12
13-14 15-21
RUNNING -IN CARBURETOR
7
CARBURETOR AIR-BLEED ADJUSTMENT
8
TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START
9
VALVE ADJUSTING
10
12
CARE AND MAINTENANCE GENUINE PARTS & ACCESSORIES ENGINE EXPLODED VIEWS & PARTS LIST CARBURETOR EXPLODED VIEWS
& PARTS LIST THREE VIEW DRAWING MEMO
21
22-23
24
25-26 27-29
30
31
32-35
36-37 38-39
40
1
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 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.
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 metres) 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.
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
Model engine fuel is also highly flammable. Keep it away fr om 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.
3
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.
If you remove the glowplug from the engine and check its condition by connecting the battery leads to it, do not hold the plug with bare fingers.Use an appropriate tool or a folded piece of cloth.
Install 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.
4
NOTES
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. If a safety locknut assembly is provided with your engine, 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.
Preferably, use an electric starter. The wearing of safety glasses is also strongly recommended.
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.
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 carburetor.
5
NOTES
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 glowplug­ignition 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!
6
This manual handles the following two versions.
FS-30S, FS-40S
The FS Series engines are up-to-date overhead-valve four-str oke-cycle engines for model aircraft use and are the outcome of a long period of technical development. The FS Series engines are produced by the world's oldest and largest model engine manufacturing company; a company which also pioneered the quantity production of model four-cycle engines.
Accessories
FS-30S
F-2010 Silencer Assembly
FS-40S
Silencer Body Choke rod
INSTALLING THE GLOWPLUG
Install washer on glowplug and insert carefully into cylinder-head, making sure that it is not cross­threaded before tightening firmly.
Glow plug
Washer
BASIC ENGINE PARTS
Glow plug
Carburetor
Fuel inlet
Breather nipple
Cover plate
7
Rocker Cover
Exhaust pipe
Lock nut
Propeller nut
Drive Hub
Crankcase
Beam Mount
Propeller Washer
FS-30S
INSTALLATION
Installation in the model
A typical method of beam mounting is shown below,left.
At least 12mm (1/2") for FS-30S
At least 15mm(19/32") for FS-40S
Make sure that the mounting beams are parallel and that their top surfaces are in the same plane.
CORRECT
At least 12mm (1/2") for FS-30S At least 15mm(19/32") for FS-40S
O.S. radial motor mount (Available as an optional extra part. See parts list)
Rigid hardwood (e.g. maple)
INCORRECT
How to fasten the mounting screws.
3mm steel nuts for FS-30S
3.5mm steel nuts for FS-40S Spring washer or lock washer
3mm steel screw for FS-30S
3.5mm steel screw for FS-40S
Tighten second nut firmly down onto first nut.
Tighten this nut first.
Steel washer
Hardwood mounting beams
3mm steel Allen screw for FS-30S
3.5mm steel Allen screw for FS-40S
Spring washer
Hardwood such as cherry or maple.
Front view
Top surfaces are in the same plane.
Side view
Top surfaces are not in the same plane.
Re-align the surfaces as necessary
Engine does not rest firmly.
Opposite beam
Top surfaces are not in the same plane.
INSTALLATION OF CHOKE ROD
(FS-40S)
The FS Series engines are equipped with self­reopening choke valves. Cut the choke rod (supplied) to the length indicated, then secire the rod by tightening the set screw, using
1.5mm Allen wrench, after installing the engine.
Releasing the choke rod allows the choke valve to open.
Frame sides of fuselage
Choke rod
1.5mm Allen key
O.S. radial motor mount (cast aluminum)
8
NEEDLE VALVE EXTENSION
The needle-valve supplied with these engines is designed to incorporate an extension so that, when the engine is enclosed within the fuselage, the needle-valve may be adjusted from the outside. Cut a commercially available rod to the required length, bend one end to an L shape, insert it into needle's center hole and secure it by tightening the set-screw in the needle-valve knob with 1.5mm. Allen key.
1.5mm Allen key
Set-screw
Set-screw
approx. 7mm
approx. 2mm
Choke rod
9
SILENCER
Installation for FS-30S and FS-40S
Screw the exhaust header pipe into the exhaust port until it "bottoms", then unscrew it just sufficiently to achieve the required exhaust outlet angle. Secure the pipe in this position by tightening the locknut firmly against the cylinder head with the wrench supplied. Then, screw the silencer onto the end of the header pipe and tighten locknut firmly. Re-check tightness of locknuts when engine is hot.
LINKAGE OF THROTTLE LEVER
First, ensure that the throttle rotor is fully closed when the throttle-lever is in the closed position. Adjust rotor stop screw if necessary. Then couple the lever to the throttle-servo so that the rotor is fully closed when the transmitter throttle stick and trim lever are in the fully retarded position.
BEFORE STARTING
Tools, accessories, etc.
The following items are necessary for operating the engine.
1 Fuel
Model glowplug engine fuel of good quality, preferably containing a small percentage of nitromethane. (See "Advice on selection of fuel, glowplug and propeller")
2 Glowplug
O.S. Type F glowplug is installed in the engine.
3 Propeller
Suggested propellers are shown in the ADVICE ON SELECTION OF FUEL & PROPELLER section.
4 Glowplug battery
The power source for heating the glowplug may be a
1.2volt Ni-cd battery a large heavy-duty 1.5volt dry cell, or a 2-volt rechargeable lead-acid cell (accumulator).
10
If a 2-volt cell is employed, use a resistance wire, as shown, to reduce applied voltage, otherwise element
1.5 volt heavy-duty dry battery
or 2 volt rechargeable lead-acid cell (at least 5Ah)
will overheat and burn out.
Warning (Very hot)
Never touch the nichrome wire while the battery is connected.
Resistance coil (nichrome wire)
Battery leads
Adjust applied voltage by changing the position of clip on resistance coil until glowplug element is glowing bright red.
Raise
voltage to
increase
brightness.
Lower voltage to
reduce brightness.
5 Plug wrench
Used for tightening glowplug. The O.S. long plug wrench is available as an optional accessory.
6 Battery leads
These are used to conduct current from the battery to the glowplug. Basically, two leads, with clips, are required, but, for greater conve­nience, twin leads with special glowplug connectors, as shown on the right, are commercially available.
Battery leads
7 Fuel tank
For installation in the model, a 150cc(5oz.) for FS-30S and FS-40S tank is suggested. These will allow 10 minute flight.
8 Fuel bottle or pump
For filling the fuel tank, a simple,
Fuel bulb
Fuel pumps
polyethylene "squeeze" bottle, with a suitable spout,is all that is required. Alternatively, one of the purpose-made manual or electric fuel pumps may be used to transfer fuel directly from your fuel container to the fuel tank.
11
For tightening glowplug
Manual
Electric
9 Electric starter and starter battery
An electric starter is recommended for starting.
10 Fuel can filter
Install a filter in the outlet line of your refuelling container to prevent entry off oreign matter into the fuel tank. (Refer to of STARTING THE ENGINE section.)
11 Silicone tubing
This is required for the connection between the fuel tank and engine.
3
Fuel Can Filter
FUEL AND PRESSURE LINES
Connect suitable lengths of silicone tubing, as illustrated, after installing the engine.
Attention to tank height
Muffler to tank pressure line
Fuel level
Note: When cutting silicone tubing···
Use knife or razor blade
*If you should need to clean the silicone tubing, use methanol or glow-fuel, not gasoline or kerosene.
Silicone tubing
Do not use wire cutters or pliers.
Silencer (muffler) pressurized fuel system
To reduce variation in fuel "head" and ensure steady fuel delivery at the carburetor, it is advisable to employ a silencer (muffler) pressurized fuel system, i.e. to use the silencer outlet nipple to pressurize the fuel tank as shown at left.
Locate the fuel tank so the top of the tank is 5-10mm(1/4-3/8") above the level of theneedle-valve.
5-10mm
12
ADVICE ON SELECTION OF FUEL, GLOWPLUG & PROPELLER
Fuel
Use a good quality commercial fuel or one of the blends shown in the table. Fuel "A" is suitab le for running-in and ordinary use. Fuel "B" is for use when more power is required and for improved flexibility. Note that even a small quantity of nitromethane (3-5%) will improve flexibility, making the needle-valve adjustment less critical and improving throttle response. Use only materials of the highest purity. Synthetic oils are permissible but are less tolerant of a "lean run" than castor-oil. If , therefore, a synthetic lubricant is used in the fuel, readjust the needle-valve to a slightly richer setting, as a safety measure, in case the fuel/air mixture becomes too lean through maneuvers in flight. If a higher nitro fuel is used, the engine should be checked out to make sure that it is sufficiently run-in to operate on that particular fuel without overheating. Do not use fuels containing less than 18% lubricant.
13
A
Methanol Castor Oil Nitromethane
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. Do not smoke, or allow anyone else to smoke, near to it.
PROPELLER
Suggested propeller sizes are given in the table. As the ideal propeller diameter, pitch and blade area vary according to the size, weight and type of model, final propeller selection will require in flight experimentation.
Reminder!
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.
75% 20%
5%
B
65% 20% 15%
FS-30S
FS-40S
Sport & Aerobatic
9x6-7, 10x4
10x7-7.5, 11x6 10x7, 10.5x6, 11x7
Trainer & Scale
10x5-6
12x5-6
GLOWPLUG
The FS-30S and FS-40S are supplied with an O.S. Type F glowplug, specially designed for O.S. four­stroke engines.
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.
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.
14
ST ARTING THE ENGINE
Preparations
1 Installing the glowplug
Install the washer on the glowplug and screw carefully into cylinder-head, making sure that it is not cross-threaded before tightening firmly.
2 Installing the propeller
There is a risk, particularly with four-stroke engines, of the propeller flying off if the propeller nut loosens due to detonation or "knocking" when the engine is run too lean or under too heavy a load. To prevent this from happening, it is recommended to use the special Propeller Locknut Set (optional extra) with the FS­40S.
Wrench
Glow plug
Washer
Tighten the propeller nut firmly so that compression is first felt around this position(i.e. with blades horizontall) when turning the propeller in the direction of arrow.
3 Filling the fuel tank
Re-connect fuel line to engine after tank is filled.
Disconnect fuel line from the fuel inlet, and connect it to the tubing from the fuel pump.
15
Fuel pump
Use a fuel can filter (e.g. O.S. Super Filter).
Do not let dirt or dust enter fuel can.
Fuel (model glow-plug engine fuel)
Starting
4 Opening and closing of the needle-valve
Turn needle-valve clockwise to close (for leaner mixture). Turn needle-valve counter-clockwise to open (for richer mixture).
5 Setting the needle-valve
Turn the needle-valve in the direction of arrow slowly, without forcing, until it stops. The position where the needle-valve stops is the fully closed position. It may be convenient to remember the position of the mark or set-screw at this time.
Turn the needle-valve in the direction of arrow from the closed position. FS-30S (2 to 2-1/2 turns)
FS-40S (2-1/2 to 3 turns)
6 Open the throttle fully
Fully closed position
Fully opened position
Open
Close
Throttle
Close
Set-screw
Open
7 Priming
Fuel will flow from tank to carburetor as propeller is turned.
Turn the propeller four revolutions while watching fuel line.
Turn the propeller 3 to 4 turns counter­clockwise smartly by finger in the direction of arrow. Turn approx. 10 turns when the engine is cold.
16
Close the air intake by operating the choke control. (FS-40S)
Hold model securely when starting
8
Glowplug battery. Place as far to the rear as possible.
Starter
Be careful not to be hit by propeller!
9 Setting the throttle
Fully closed position
Set at this Position.
Assistant should hold the model so that it cannot move forward when the engine starts.
Assistant
Fully opened position
10
Heat glowplug
Starting battery
Connect battery leads as shown (polarity is immaterial.)
11
Apply electric starter
17
Check that the throttle is one-third open from the fully closed position. Bring the starter into contact with the spinner nut or spinner and depress the starter switch for one or two seconds. Repeat if necessary. When the engine fires, withdraw the starter immediately.
Attention: Never place your finger over the carburetor intake when applying the starter. Such an action will cause an excess quantity of fuel to be drawn into the cylinder and result in hydraulic lock that may damage the engine.
12
Engine starts
BEWARE of the rotating propeller.
In the interests of safety, keep your face and other parts of the body away from the vicinity of the propeller.
13
Needle-valve adjustment(1)
Slowly advance throttle to its fully open position, then gradually close the needle­valve until the exhaust sound changes pitch.
Listen to the sound carefully.
Close the needle-valve gradually until a high-pitched exhaust note begins to be superimposed on the lower-pitched sound.
14
Disconnect battery leads
Disconnect the battery leads from the engine with care so that the plug clip does not touch the rotating pro-peller.
If the engine stops when battery leads are disconnected, close the needle-valve a little (approx. 45˚) further, and restart the engine.
18
15
Needle-valve adjustment(2)
As the needle-valve is closed beyond the initial readjustment, the rpm of the engine will be increased and a continuous high­pitched exhaust note, only, will be heard.
Key to the needle-valve adjustment. (Turn 15-30˚ at a time.)
Turn the needle-valve 15-30˚ in the direction of arrow, and wait momentarily for the change of r.p.m. After the rpm of the engine increases, 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.
16
Needle-valve adjustment(Summary)
Practical best(optimum) needle-valve setting
Maximum rpm setting("Lean").
20-30
˚
"Rich" needle-valve setting when starting
t
t
the engine.
e
r
d
a
t
o
s
t
.
s
e
n
s
o
i
a
t
e
u
l
r
o
c
v
e
e
d
R
o
t
e
E
n
i
n
g
s
s
p
t
o
Disconnect battery leads from glowplug at about this point.
The engine may stop if the battery leads are disconnected from the glowplug while the engine is running rich.
NOTE: The above sketch is for reference purposes only. Actual needle positions may differ from those shown.
19
On starting from cold, with the needle-valve set at the rich starting position:
a good deal of white smoke is emitted.
As the needle-valve is closed and the r.p.m. increases
Exhaust smoke will be less dense and grey in color.
Further needle-valve closure:
rpm will increase and exhaust smoke will be reduced.
Finally:
maximum rpm is reached and will fall off (or engine will stop) if needle -valve is closed any further. Exhaust gas will be very light.
Now, re-open needle-valve 20-30 degree
This will produce the practical best (i.e. optimum) (lower than maximum rpm). A light grey exhaust emission may be observed.
Take note of this position of the needle-valve.
rp m setting
Subsequent starting procedure
Once the optimum needle-valve setting has been established (see "Needle-valve adjustment­Summary") the procedure for starting is simplified as follows:
1) Open the needle-valve one half-turn (180˚) from
the optimum setting.
2) Open the throttle fully, place your finger over the
carburettor intake and rotate the propeller through two revolutions to prime the engine.
3) Set the throttle one-third open from the fully closed
position, energize the glowplug and apply the starter. When the engine starts, re-open the throttle and re-adjust 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. Also, if the engine is being re-started immediately after a run (i.e.hot), priming should not be necessary.
16
20
17
How to stop the engine
Close the throttle to reduce to the lowest possible r.p.m.
Close
With the transmitter throttle trim lever fully retarded, adjust the throttle servo linkage so that the throttle rotor is fully closed (i.e.engine stopped) when the stick is fully retarded.
RUNNING-IN ("Breaking-in")
All internal-combustion engines benefit, to some degree, 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 a little time to settle down after being subjected to high temperatures and stresses. However, because O.S. engines are made with the aid of the finest modern precision machinery and from the best and most suitable materials, only a very short and simple running-in procedure is required and can be carried out with the engine installed in the model.The process is as follows:
1) Start the engine and, with the throttle fully open, open the needle-valve an extra half turn (180˚) from the optimum setting. This will produce a rich mixture that will result in cooler running. Allow the engine to run out a full tank on the ground. (Avoid dusty surroundings.)
2) Now fly the model with the needle-valve re-set 20­30 degrees open from the optimum setting ( i.e. 40-60˚ from the highest rpm setting ).
3) Close the needle-valve very slightly on successive flights so that the engine is running on its optimum needle setting at the fifth or sixth flight.
21
CARBURETOR
These engines are equipped with a throttle type car­buretor which provides a wide range of engine speed control. With the throttle lever linked to a suitable servo in the model, movement of the throttle control on the transmitter will enable engine to be varied, proportionally, from idling speed to full power. The carburetor of your engine has been factory set for the approximate best results and no adjustment (except to the needle-valve) should be required provided that the fuel tank is correctly located, as previously described. After the engine has been run­in, check the operation of the throttle according to the following chart. Re-adjust the controls only when necessary.
22
Re-set the idling position at a little higher r.p.m.
Start the engine.
Make sure that the throttle is fully open.
Adjust the neede-valve.
Close the throttle gradually.
Find the idling position.
Fix the idling position.
Open the throttle fully.
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.
CARBURETOR AIR-BLEED ADJUSTMENT
Pre-Flight Check
Start engine and adjust needle­valve as previously described.
Close the throttle gradually.
Find the idling position.
Repeat the procedure while opening and closing
the throttle until the best result is obtained.
Hold the model.
Hold model level, then slowly raise its nose.
If rpm increases.
approx. 15˚
If engine runs unevenly or stops.
23
Refer to the CARBURETOR AIR-BLEED ADJUSTMENT section on page 24.
Engine stops.
Engine stops.
Engine stops.
Does the engine regain full power?
Continue running at high speed for 10 seconds.
Close the throttle.
Run at idling speed for 5 seconds.
Does the engine stop?
Apply full throttle.
Does the engine regain full power immediately?
OK
Yes.
No.
Yes.
24
Stop the engine.
Note: Stop engine by pinching fuel line Do not touch needle-valve.
These adjustments can be made without stopping the engine. However, it is advisable for beginners to stop the engine for safety reasons.
Open air-bleed screw.
Half turn at a time.
Attention: Do not leave the glowplug connected to the
battery while adjusting the carburetor throttle.
approx. 15˚
Immediately point nose down, so that engine runs steadily again.
Stop the engine.
Close air-bleed screw.
Half turn at a time.
TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START
Four key points
For quick, reliable starting, the following four conditions are required.
1 Good compression. 2 Adequate "glow" at glowplug. 3 Correct mixture. 4 Sufficient electric starter rotating speed.
If the engine fails to start, or does not keep running after being started, check symptoms against the following chart and take necessary corrective action. Note: The most common causes of trouble are marked with three asterisks, the less common problems with one or two asterisks.
Symptom
Engine fails to fire.
Symptom
Engine fires intermittently but does not run.
Engine fires once or twice, then fails to fire.
Engine starts but rpm decreases and engine eventually stops.
Engine starts, rpm increases and engine cuts out.
Engine stops when battery leads are disconnected after starting.
Factor
1
2
3
Factor
2 3
1
2
3 3
3
3 2
Cause
Sluggish rotation
Glowplug battery discharged.
Glowplug element is burned out
Something wrong with battery leads. Engine "flooded" due to excessive priming.
Insufficient priming.
......
......
Cause
Incorrect heating of glowplug.
Over priming.
Sluggish rotation.
Glowplug battery discharged.
Insufficient priming.
Mixture too rich.
Fuel not reaching the engine.
Mixture too rich.
Mismatch of glow plug and fuel.
.....
........
......
......
.....
.......
.....
.......
Corrective action
Recharge the electric starter battery.
Recharge lead-acid cell or replace dry battery. (Note: An unused, or almost unused, dry battery may sometimes be of insufficient capacity if it is "old stock".)
.....
Replace glowplug. Check that applied voltage is not too high.
....
Check glowplug heating using other leads.
....
Close needle-valve fully and remove glowplug, then flip propeller to pump out excess fuel. (Invert engine, if possible, while pumping out excess). Re­start engine. (Priming is not necessary at this time.)
.....
Repeat priming procedure referring to 7 Priming.
25
Corrective action
Voltage too high or too low. Re-check and readjust referring to "BEFORE STARTING" paragraph 4.
Continue flipping propeller. If engine does not start after more than 10 flips, disconnect battery from glowplug and leave for a few minutes, then re­energize plug and flip prop again. If engine still does not start, remove glowplug and pump out excess fuel by flipping prop quickly.
Then re-start. (Priming is not necessary.) Recharge the electric starter battery.
Recharge lead-acid cell or replace dry battery. (Note: An unused, or almost unused, dry battery may sometimes be of insufficient capacity if it is "old stock".)
Repeat priming procedure referring to 7 Priming.
Close needle-valve half turn (180˚) and wait for several minutes then re­start.(Priming is not necessary.)
Make sure that tank is filled with fuel. Check that there is not something wrong with the fuel line (kinked or split). Check that carburettor is not clogged with dirt.
Close the needle-valve a little.
...
Change fuel or glowplug.
26
VALVE ADJUSTING
ALL O.S. four-stroke engines have their valve(tappet) clearances correctly set before they leave the factory. However, if, after many hours of running time have been logged, a loss of power is detected, or if the engine has to be disassembled or repaired as a result of an accident, valve clearances should be checked and readjusted, as necessary an O.S. Valve Adjusting Tool Kit is available as an optional accessory.
The kit comes in a plastic case and includes: (Code No.72200060)
Feeler gauge 0.04mm
Feeler gauge 0.1mm
Hex. key 1.5mm
Wrench 5mm
Note: Valve clearances of all O.S. four-stroke-cycle engines must be checked and reset ONLY WHEN THE ENGINE IS COLD. Procedure is as follows:
(1)
1.
Remove the cover from the rocker-box on top of the cylinderhead, using the correct size Allen hex key.
Turn the propeller counter-clockwise until
2. compression is first felt, then turn it futher quarter turn. At this point, both valves should be closed. (If the prop driver ('drive hub') of your engine is engraved with a letter 'T', this mark should now be at the top.)
3.
The standard valve clearance, on both inlet and exhaust valves, is between 0.04mm and
0.10mm(0.0015-0.004 inch), measured between valve stem and rocker arm. Use the 0.04mm and
0.10mm feeler gauges to check clearances. (See Fig.1.)
27
Note: If the gap is found to be less than 0.04mm, it is not necessary to readjust the clearance if the engine has good compression and starts easily.
Equally, if the gap exceeds 0.10mm but is not more than 0.14mm (i.e. the thickness of both feeler gauges inserted together), it is not necessary to readjust the clearance if the engine runs satisfactorily.
0.04mm Feeler Gauge
Rocker Arm
Valve
Fig.1
If a clearance is found to be outside either of
(2)
these limits, it should be reset as follows.
Carefully loosen the locknut on rocker-arm 1/4-1/2
1. turn with 5mm wrench. (Fig.2.)
Locknut
Wrench
Turn adjusting-screw approx. 1/2 turn counter-clockwise
2. to open gap, using appropriate tool -i.e. Allen hex key. (Fig.3.)
Adjusting Screw
Allen Key
28
Loosen approx. 1/4 to 1/2 turn.
Fig.2
Turn approx. 1/2 turn.
Fig.3
Insert 0.04mm feeler gauge between valve stem and
3. rocker-arm and gently turn adjusting screw clockwise until it stops.(Fig.4.)
Turn with fingers until it stops.
0.04mm Feeler Gauge
Re-tighten locknut while holding adjusting screw
4. stationary. (Fig.5.)
Hold at the screw head.
Fig.4
Remove 0.04mm feeler, rotate prop through two
5. revolutions and recheck gap.
6.
If clearance is correct, loosen the locknut on the other rocker-arm and repeat steps 1 to 5 above. Finally, replace rocker box cover.
Remember: Excessive valve clearance will cause loss of power, due to valve (s) not opening sufficiently. On the other hand, a total loss of clearance may cause difficult starting due to valves not closing properly, resulting in loss of compression.
Fig.5
Tighten Locknut.
29
CARE AND MAINTENANCE
To ensure that you obtain long life and peak performance from your engine, observe the following.
Avoid running the engine under dusty conditions.
1. If necessary, lay a sheet of plywood or hard-board in front and under the nose of the model when starting the engine.
Foreign matter in the fuel can cause the
2. carburetor jet to be partially clogged.
Therefore:
rinse out the fuel tank with methanol or fuel before installing it.
Install a fuel filter in the fuel line between tank and carburettor.
Install a fuel filter in the outlet of your squeeze bottle, or to the pump inlet if you use a manual or
electric pump. do not leave your fuel container open needlessly. check filters periodically and clean them when
necessary.
3.
Do not leave raw fuel in the engine at the conclusion of a flying session: it may cause corrosion. The best practice is to disconnect the fuel line from the carburetor while the engine is running. Remaining fuel in the tank should also be drained off.
Clean the exterior of the engine with a clean cotton
4. cloth.If this is not done, oil and dirt will burn onto the outside of the engine each time it is run and the engine will soon become discolored.
If the engine is not in use for a while (more than
5. two months) remove the glowplug and rinse out the interior with kerosene (not gasoline), by rotating the crankshaft. Shake out residue, then inject light machine-oil through the plug hole and carburetor intake, again rotating the shaft to distribute the protective oil to all working parts. Gasoline, thinner, kerosene and light machine oil cause swelling and deterioration of plastic parts, "O" rings and fuel tubing. Use methanol for cleaning these engines.
Avoid unnecessary dismantling of your engine.
6.
30
O.S. GENUINE PARTS & ACCESSORIES
O.S.Glow Plug TYPE F
(71615009)
Radial Mount Set
For FS-30S (71908300) For FS-40S (71906000)
Propeller Locknut Set
For FS-40S (45810100)
Valve Adjusting Tool Kit
(72200060)
NEEDLE VALVE EXTENSION SET
(72200080)
NON-BUBBLE Weight
(71531000)
Flexible Exhaust Pipes
For FS-40S
1010A (72108300)
1010B (72108310)
Long Socket Wrench With Plug Grip
(71521000)
31
Super Filter (L)
(72403050)
FS-30S ENGINE EXPLODED VIEW
C.M2.6x12
C.M2.6x18
8
9
32
12
17
18
C.M2.6x7
15
Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw
16-1
16
3-2
13
3-1
10 11
14
FS-30S PARTS LIST
No.
3-1 3-2
4-1 4-2
5-1 5-2 5-3 5-4
10 11 12 13 14 15 16
16-1
17 18 19 20 21 22
23 23-1 23-2
24
25
26
27
1 2 3
4
5
6 7 8 9
Code No.
44113000 43004200 45761400 45761410 45761600 45761000 45761100 45761200 43060000 45760110 43060200 45060309 46160400 44104100 44104030 43081000 22714100 43003400 43003200 43006000 45705000 43003100 43007000 43002000 45702100 22630002 43001000 45762100 43062000 45701100 44166000 44166100 44166110 24881824 45264000 45231000 45208010 45810100 43025000 43025100 45771000 43069000 43069200 71615009
Screw Set Rocker Cover Rocker Support Assembly Rocker Support Rocker Arm Retainer(2pcs.) Rocker Arm Assembly(1pair) Rocker Arm(1pc.) Tappet Adjusting Screw Valve Assembly(1pair) Intake Valve(1pc.) Valve Spring(1pc.) Valve Spring Seat(1pc.) Valve Spring Retainer(2ps.) Cylinder Head(W/Gasket) Cylinder Head (W/Gasket and Valve Assembly) Carburetor Complete (20N) Gasket Set Piston Ring Piston Piston Pin Connecting Rod Cylinder Liner Cover Plate Crankshaft Crankshaft Spacer Crankshaft Ball Bearing(Rear) Crankcase Thrust Ball(2pc.) Camshaft Cam Cover Push Rod(2pcs.) Push Rod Cover Assembly(2pcs.) Push Rod Cover(1pcs.) Push Rod Cover ORing(2pcs.) Cam Follower(2pcs.) Crankshaft Ball Bearing(Front) Drive Hub Lock Nut Set F-2010 Silencer Assembly Silencer Body Pressure Nipple (No.5) Exhaust Header Pipe Assembly Manifold Nut (M9) Glow Plug Type F
2
(
)
C.M3x10
3
4-1
4
4-2
5-4
5-3
5-2
5
5-1
6
7
1
22
33
23-2 23-1
23
23-2
24
27
26
25
19
20
21
C.M2.6x7
Specifications are subject to alteration for improvement without notice.
Description
FS-40S ENGINE EXPLODED VIEW
C.M2.6X12
C.M3X18
C.M2.6X7
8
34
9
11
12 13
15
17
C.M3X8
16
Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw
14
19
18
FS-40S PARTS LIST
2
3-2
3
3-1
4-1
4
4-2
5-4
5-3
5-2
5
7
5-1
6
1
10
24
25-2
25-1
25
25-2
26
30
29
28
27
23
21
20
22
C.M2.6X7
21
35
No.
3-1 3-2
4-1 4-2
5-1 5-2 5-3 5-4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 25-1 25-2
26
27
28
29
30
1 2 3
4
5
6 7 8 9
Code No.
45213010 45204210 45261400 45261410 45761600 45261010 45261110 45761200 45260010 45260110 45060205 45060309 45060402 45204110 45204010 45281020 45214100 24203410 45203210 23356000 45205000 45203100 45284000 45207000 45771000 45202010 22630002 45201040 45231100 45262010 45201110 45266010 45266102 45266112 24881824 45264000 45231000 45208010 23209003 23210007 45225000 45225010 45226000 71615009
Screw Set Rocker Cover Rocker Support Assembly Rocker Support Rocker Arm Retainer(2pcs.) Rocker Arm Assembly(1pair) Rocker Arm(1pc.) Tappet Adjusting Screw Valve Assembly(1pair) Intake Valve(1pc.) Valve Spring(1pc.) Valve Spring Seat(1pc.) Valve Spring Retainer(2ps.) Cylinder Head(W/Gasket) Cylinder Head (W/Gasket and Valve Assembly) Carburetor Complete Head Gasket Piston Ring Piston Piston Pin Connecting Rod Cylinder Liner Choke Valve Assembly Cover Plate Breather Nipple Crankshaft Crankshaft Ball Bearing(Rear) Crankcase Camshaft Bearing Camshaft Cam Cover Push Rod(2pcs.) Push Rod Cover Assembly(2pcs.) Push Rod Cover(1pcs.) Push Rod Cover ORing(2pcs.) Cam Follower(2pcs.) Crankshaft Ball Bearing(Front) Drive Hub Propeller Washer Propeller Nut Silencer Assembly Silencer Exhaust Header Pipe Glow Plug Type F
Specifications are subject to alteration for improvement without notice.
Description
CARBURETOR EXPLODED VIEW & PARTS LIST
TYPE 20N
6
6-2
6-3
1-1
N.+M3x6
1
4
C.M2.6x7
5
3
2
6-4
M2.6X5
7
Type of screw
C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw
No.
Code No.
1
22081408
1-1
22081313
2
45281200
3
43081100
4
45281700
5
22081811
6
43081900
6-1
45781970
6-2
43081960
6-3
6-1
S.M3X3
22611302
6-4
45281920
7
22081820
Specifications are subject to alteration for improvement without notice.
Throttle Lever Assembly Throttle Lever Retaining Screw Carburetor Rotor Carburetor Body Carburetor Retaining Screw(3pcs.) Throttle Stop Screw Needle-valve Assembly Needle Nozzle Assembly Ratchet Spring Nozzle Retaining Screw(2pcs.) Air-bleed Screw
Description
36
CARBURETTOR EXPLODED VIEW & PARTS LIST
4
5
N.+M3X6
1-1
2
1
M2.6X5
Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw
TYPE FS-40S
C.M2.6X7
3
6-5
7
6-3
6-4
Code No.
No.
1
22081408
1-1
22081313
2
45281120
3
45281110
4
45281700
5
22081811
6
45281910
6-1
6
6-1
45781970
6-2
26381501
6-3
45283960
6-4
23011308
6-5
45281920
7
22081820
Specifications are subject to alteration for improvement without notice.
6-2
S.M3X3
37
Throttle Lever Assembly Throttle Lever Retaining Screw Carburetor Rotor Carburetor Body Carburetor Retaining Screw(3pcs.) Throttle Stop Screw Needle-valve Assembly Needle Set-screw Nozzle Assembly Ratchet Spring Nozzle Retaining Screw(2pcs.) Air-bleed Screw
Description
FS-30S THREE VIEW DRAWING
Specification
Displacement Bore Stroke Practical R.P.M. Power output Weight
(Weight of Silencer)
4.89 cc (0.299 cu.in.
19.5mm (0.767 in.
16.4mm (0.648 in. 2,500-13,000 r.p.m.
0.5ps / 10,000 r.p.m. 279g (9.56 oz.
18g (0.6 oz.)
) ) )
)
Dimension(mm)
4- 3.3
36
14
29 44
FS-40S THREE VIEW DRAWING
FS-40S
Displacement Bore Stroke Practical R.P.M. Power output Weight
(Weight of Silencer)
Specification
6.49 cc (0.396 cu.in.
21.2mm (0.835 in.
18.4mm (0.724 in. 2,200-12,000 r.p.m.
0.65ps / 12,000 r.p.m. 355g (12.5 oz.
21.2g (0.7 oz.)
) ) )
)
UNF1/4-28
38
4728
75
112
Dimension(mm)
71.5
15
37
39
MEMO
40
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Copyright 2002 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
URL : http://www.os-engines.co.jp
080203
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