O.S. Engines 18TM Revo User Manual

Page 1
18TM w/11K-R & T-Maxx Revo Manifold
MAX-
OWNER'S INSTRUCTION MANUAL
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.
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.
Page 2
CONTENTS
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE...... 2-5
ENGINE CONSTRUCTION........................... 6
NOTES WHEN APPLYING AN ELECTRIC STARTER
ABOUT THE
................................. 7
ENGINE ......................................
8
FINAL ADJUSTMENT .................... 20-22
CARBURETOR CLEANLINESS ............. 22
CARE AND MAINTENANCE ........................... 23-24
CHECKING THE ENGINE ................. 25
TROUBLE
SHOOTING ......................... 26-29
BEFORE
STARTING .......................................
BASIC
ENGINE
PARTS ....................................
CARBURETOR
FACTS ABOUT GLOWPLUG ........................12
INSTALLATION OF THE CARBURETOR ....... 13
INSTALLATION ..............................................13-16
STARTING THE ENGINE & RUNNING-IN .....17-19
CONTROLS ........................... 11
8-10
10
ENGINE EXPLODED VIEW & PARTS CARBURETOR EXPLODED VIEW &
PARTS LIST............................. 32-33
O.S. GENUINE PARTS & ACCESSORIES ........... 34
THREE VIEW DRAWING ............................ 35
GUARANTEED TO KEEP YOUR
R/C CAR RUNNING WELL .............. 36-39
LIMITED
WARRANTY............................. 41
LIST.... 30-31
1
Page 3
SAFETY INSTRUCTIONS AND WARNINGS ABOUTYOUR 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
Page 4
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 an 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
Page 5
NOTES
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.
Install an effective Silencer (muffter). 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.
The wearing of safety glasses is also strongly recommended.
Before starting the engine, always check the tightness of all the screws and nuts especially those of joint and movable parts such as throttle arm. Missing retightening the loose screws and nuts often causes the parts breakage that is capable of harming you.
4
Page 6
NOTES
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.
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.
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
Page 7
ENGINE CONSTRUCTION
With this engine, the piston will feel tight at the top of its stroke (TDC) when the engine is cold. This is normal. The cylinder bore has a slight taper. The piston and cylinder are designed to achieve a perfect running clearance when they reach operating temperature.
Near TDC
Piston
Cylinder Liner
Crankshaft Slight taper
When the engine is cold. When the engine-is hot.
6
Page 8
NOTES WHEN APPLYING AN ELECTRIC STARTER
Do not over-prime. This could cause a hydraulic lock and damage the engine on application of the electric starter.
If over-primed, remove glowplug, close needle-valve and apply starter to pump out surplus fuel. Cover the head with a rag to prevent pumped out fuel coming into your eyes.
7
Page 9
ABOUT THE ENGINE
This engine is designed especially to power the T­Maxx Revo. Purposelly designed LC3 glow plug is supplied with the engine for improved power, fuel economy and durability. The new 11K-R carburetor offers easy handling as well as high performance.
"T-Maxx Revo" is a trademark of Traxxas Corp.
Standard accessories
Glow Plug LC3
Exhaust Seal Ring 1 piece Exhaust Manifold for T-Maxx Revo
BEFORE STARTING
Tools, accessories, etc.The following items are necessary for operating the engine.
Items necessary for starting
FUEL
Generally, it is suggested that the user selects a fuel that is commercially available for model two-stroke engines and contains 10-30% nitromethane. As a starting point, we recommend a fuel containing 20% nitromethane, changing to a fuel containing more nitro if necessary. When the brand of fuel is changed, or the nitro content increased, it is advisable to repeat the running-in procedure referred to in the RUNNING-IN paragraphs. Please note that with high-nitro fuels, although power may be increased for competition purposes, glowplug elements do not last as long and engine life will be shortened.
8
Page 10
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.
FUEL FILTER
To installed in the fuel line between fuel tank and carburetor to prevent dust coming into the carburetor.
GLOWPLUG IGNITER
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.
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.
9
Page 11
TOOLS
HEX WRENCH
Necessary for engine installation.
1.5mm, 2mm, 2.5mm, 3mm
BASIC ENGINE PARTS
HeatsinkHead
SCREWDRIVER
Necessary for carburetor adjustments. No-1, No.2,etc
LONG SOCKET WRENCH WITH PLUG GRIP
Recommended for easy removal and
replacement of the angled and recessed glowplug, the O.S.Long Socket Wrench incorporates a special grip.
Carburetor
Type 11 K-R
Exhaust
Rear Adaptor
Mounting Lugs
Crankcase
Crankshaft
10
Page 12
CARBURETOR CONTROLS
Needle Valve
Mixture Control Valve
Throttle Stop
Screw
Thermo Insulator
Metering Needle
Four adjustable controls are provided on
this carburetor.
The Needle-Valve;
For adjusting the mixture strength throttle is fully open.
The Mixture Control Valve:
For changing the mixture strength at mid speed and acceleration. (Do not rotate the screw more than one turn.)
The Metering Needle:
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 idle speed:
NOTE: Readjustment may be necessary, occasionally to allow for changes in fuel formula gear ratio or clutch engagement point.
11
when the
Page 13
FACTS ABOUT GLOWPLUGS
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 LC3. Carefully install 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 items.
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. 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
body has corroded. Engine tends to cut out when idling. Starting qualities deteriorate.
12
adhered to filament or plug
Page 14
INSTALLATION
First, remove the engine, installed as standard, with the engine mount.
Install the flywheel and clutch.
13
Page 15
Install the engine on the engine mount with earth wire.
Install the electric starter taken from the original engine.
Install the manifold supplied with the engine.
Page 16
Adjust the aluminum stopper end so that the throttle linkage may be made correctly.
15
Page 17
Finally, insert the wire for glow plug heating in the glow plug.
16
Page 18
STARTING THE ENGINE & RUNNING-IN ('Breaking-in')
For long life and high performance, every engine needs to be 'run-in' or 'broken-in'. With care, running-in of the MAX-18TM can be carried out with the engine installed in the vehicle. Be sure to install the air-cleaner on the carburetor and use a muffler-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 carburetor, means that fuel 'head' at the carburettor can vary and upset running.Thereforejt 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.
Fill the tank completely with fuel.
Temporarily remove the glowplug to check that it glows bright red when energized.
Element glows when energized.
Replace the plug when the element does not glow or is burnt out.
Glow Plug Igniter
17
Pliers
Page 19
The carburetor of this engine is set at starting setting when the engine leaves the factory.
Switch on the transmitter, and check that all the linkage movescorrectly.
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°. Repeat this procedure again until five 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
Needle
18
when starting the engine.
Close the needle-valve approx. 30 deg after running the vehicle every one full tank of fuel. Repeat this procedure around five times.
Page 20
Note:
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 or the fuel being changed, especially to high nitro fuel, the complete running-in should be repeated.
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 carburetor.
Fuel
Warning! Do not touch rotating parts, engine and si­lencer when stopping the engine as they become very hot, and contact with them may result in a serious burn.
19
Page 21
FINAL ADJUSTMENT
Final adjustment should be carried out only after the running-in has been completed.
Needle Valve
Metering Needle
Throttle Stop Screw
Open
Close
Open
Close
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 Needle­Valve 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
45~90 degrees.
More fuel Less fuel
Metering Needle
More fuel Less fuel
Needle Valve
20
Page 22
With the engine running, close the throttle and allow it to idle for about five seconds, then reopen the throttle fully. If, at this point, the engine puffs out an excessive amount of smoke and the vehicle does not accelerate smoothly and rapidly, it is probable that the idle mixture is top rich. In this case, turn the Metering Needle 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 idle mixture is too lean. Correct this by turning the Metering Needle counter-clockwise 45-90°.
MOTE:
Metering Needle 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
Metering Needle, or the Needle-Valve) cannot be made accurately under 'no-load' conditions, which, in any case, are not advised, since such operation carries the risk of seriously damaging the engine through over-revving and overheating.
With the optimum mixture control position, light smoke is visible during high speed running,and the engine rpm increases smoothly during acceleration. Remember that, if the engine is operated with the fuel/air mixture slightly too lean, it will overheat and run unevenly. As with all engines, it is advisable to set both the needle-valve and metering needle slightly on the rich side of the best rpm setting, as a safety measure.
If the engine runs too fast with the throttle closed, the throttle stop screw should be turned counter-clockwise to allow the throttle opening to be reduced.
21
Page 23
Finally, beyond the nominal break-in period, a slight readjustment toward a leaner needle setting may be required to maintain
maximum performance.
The correct functioning of the carburetor depends on its small fuel orifices remaining clear.
REALIGNMENT OF METERING NEEDLE AND
MIXTURE CONTROL VALVE
In the course of making carburetor adjustments, it is just possible that the Metering Needle and the Mixture Control Valve may be inadvertently screwed in or out too far and
thereby moved beyond its effective adjustment
range.
The basic positions can be found by rotating the Metering Needle until its slotted head is flush with the Throttle Lever body.
Carburetor Body
22
Slide Valve
Carburetor Body
Throttle Lever
Rotate the Metering Needle until its slotted head is flush with the Throttle Lever body. This is the standard position.
Metering Needle
First rotate the Mixture Control Valve until its slotted head is flush with the carburetor body. Then screw the valve in exactly 0.5 turn. This is the standard position.
Mixture Control Valve
Page 24
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 installed to the pickup tube inside your refueling container, will prevent the entry of foreign material into the fuel tank. It is also recommended that a good in-line filter be installed between the tank and carburetor.
2. Do not forget to clean the filters regularly to remove dirt and lint that accumulate on the
filter screens. Also, clean the carburetor itself occasionally.
3-Atthe end of each operating session, drain out
any fuel that may remain in the fuel tank. Afterwards,energize the glow-plug and try to restart the engine, to burn off any fuel that may remain inside the engine. Repeat this procedure until the engine fails to fire. Do this while the engine is still warm.
4. Then, inject some after-run oil into the engine, and rotate the engine with an electric starter for 4 to 5 seconds to distribute the oil to all the working parts.
Note:
Do not inject after-run oil into the carburetor as this may cause the 0-rings inside the carburetor to deteriorate. These
procedures will reduce the risks of starting difficulties or corrosion after a period of storage.
23
Page 25
5. Finally, when cleaning the exterior of the engine, 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 120C (248F), otherwise
it may be damaged and rendered unserviceable.
Installing Dust Caps
When storing the engine, install the cap on
the exhaust port, carburetor, etc. to prevent
dust from entering the engine.
Dirt and dust may lodge in
24
marked places.
Page 26
CHECKING THE ENGINE
Engine will not develop normal performance after long time running due to wearing of parts. It is suggested to replace necessary parts when the following symptoms are detected.
Engine sound changes and easily overheats.
Power has dropped extremely. Idling is unstable and/or engine tends to stop
at idling.
In most cases, ball bearings, cylinder & piston assembly, connecting rod and/or crankcase have become worn out or abnormal. Check the parts carefully and replace them if necessary.
25
Page 27
TROUBLE SHOOTING
Engine fails to fire.
Fuel tank is empty. Fuel not reaching the engine.
Glowplug element is burnt out.
Glowplug battery discharged
Clogged fuel filter Air cleaner and silencer inside is dirty.
Over priming Fuel tubing is disconnected.
Fuel tubing is kinked, split or has a hole.
Incorrect carburetor settings
Incorrect servo linkage
Fill the tank with fuel and repeat Priming procedure.
Replace glowplug. Recharge or replace the battery.
Clean or replace fuel filter.
Replace cleaner element and clean inside silencer. Remove glowplug and pump excess fuel. Connect fuel tubing securely.
Check the tubing carefully and replace if necessary.
Return the metering needle
and mixture control valve to basic position.
Re-linkage after setting servo at neutral.
26
Page 28
Engine fires intermittently but does not run.
Insufficient fuel in the tank.
Deteriorated glowplug
Clogged fuel filter Air cleaner and silencer inside is dirty.
Engine overheated
Incorrect clutch release
Too immediately disconnecting plug battery.
Fuel in the tank extremely bubbled
Fill the tank with fuel.
Replace glowplug.
Clean or replace fuel filter.
Replace cleaner element and clean inside silencer.
Wait until engine is cooled.
Adjust the tension of clutch spring. Do not disconnect plug battery and wait until
r.p.m, become stable. Fit "0" rings to the tank screws to
prevent bubbles.
27
Page 29
Unstable idle
Unsuitable glowplug
Unsuitable fuel Extremely light flywheel
Silencer is disconnected or has play
Not reaching expected peak r.p.m.
insufficient warming up or running-in.
Silencer or manifold is not securely connected or disconnected.
Fuel tubing from tank to is split or broken.
Use suggested glowplug in the instructions.
Do not use extremely high nitro or low oil fuel. Add suitable load.
Install silencer securely.
Set the needle only after warming up. Complete running-in.
Replace seal ring. Check the connections and secure them.
Replace the tubing.
28
Page 30
Poor response
Deteriorated glowplug Incorrect carburetor settings
Incorrect setting of transmitter Exponential function.
Poor r.p.m, drop
Too much throttle opening at idle.
Incorrect carburetor fitting
Replace glowplug.
Readjust low r.p.m, range with metering needle and mixture control valve.
Check the transmitter setting.
Close metering needle to adequate position to lower idle r.p.m.
Fit carburetor securely.
29
Page 31
16
M.+M2.6X7
14
15
13
12
ENGINE EXPLODED VIEW
C.M3X16
3
6
4
1
2
5
7
11
10
F'-Flat Head Screw N"-Round Head Screw S-"Set Screw
8
9
*Type of screw C -Cap Screw M—Oval Fillister-Head Screw
Page 32
Piston Pin Retainer (2pcs.)
Piston Pin
Inner Head
Cylinder & Piston Assembly
Outer Head
21914000
21914100
21913000
1
2
3
21816000 4
Carburetor Complete (Type 11 K-R)
Connecting Rod
21915000
21982010
21817000
678
5
Carburetor Retainer
25381701
ENGINE PARTS LIST
Crankshaft Ball Bearing (Rear)
Crankcase
Crankshaft Ball Bearing (Front)
23731000
21911000
21931000
9
101112
Crankshaft
21912000
21922000
21824000
13
14
71653000
21911800
21923000
16
15
21427200
72103710
72106172
The specifications are subject to alteration for improvement without notice.
Exhaust Manifold forT-Maxx Revo
Manifold Spring (2pcs.)
Exhaust Seal Ring (2pcs.)
Glow Plug LC3
Screw Set
Rear Adaptor
Gasket Set
Starting Shaft
Page 33
CARBURETOR EXPLODED VIEW
2-1
2
2-2
1-1
1-2
1
*s Type of screw
C...Cap Screw M...0val Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw
3
3-1
4
5
6
6-1
9
10
7
S.M3X3
8
32
Page 34
CARBURETOR PARTS LIST
1
21982600
1-1
27881820 22781800
1-2
21285901
2
2-1
27881820 21881950
2-2
21982620
3
22781800
3-1
4
21982100
21982200
5
21982540
6
22781800
6-1
7
21982520
8
23818440
9
21982900
10
22615000
The specifications are subject to alteration for improvement without notice.
Mixture Control Valve Assembly
"0" Ring(L) (2pcs.) "0" Ring(S) (2pcs.)
Needle Valve Assembly
"0" Ring (2pcs.)
No. 14 Universal Nipple Assembly
Throttle Stop Screw
"0" Ring(S) (2pcs.) Carburetor Body (w/Thermo Insulator) Slide Valve
Metering Needle Assembly
"0" Ring(S) (2pcs.)
Dust Cover Throttle Lever Thermo Insulator Carburetor Rubber Gasket
33
Page 35
RACING ENGINE PARTS
O.S. GENUINE PARTS & ACCESSORIES
O.S. Glow Plug
LC3
(71653000)
Dust Cap Set
3 (73300305)
For Carburetor Nipple
7(73300712)
For Silencer
12(73301212)
For Carburetor
Exhaust Seal Ring
(21427200)
(2pcs.)
Long Socket Wrench
With Plug Grip
(71521000)
The specifications are subject to alteration for improvement without notice.
Manifold Spring (2pcs.)
(72106172)
34
Page 36
THREE VIEW DRAWING
SPECIFICATIONS
Displacement Bore Stroke
Practical R.P.M. Power output
Weight
3.0cc (0.183cu.in.)
16.0mm (0.629in.)
15.0mm (0.590m.) 3,000-34,000 r.p.m.
1.6ps/29,000 r.p.m. 233g (8.22oz.)
Dimensions (mm)
35
Page 37
GUARANTEED TO
KEEP YOUR R/C CAR RUNNING WELL
KEEP IT CLEAN
Dirt is the most common way to ruin your engine. If it gets inside, the dirt will act just like sandpaper and ruin the close fit that the parts need for your engine to operate correctly
• Use an air filter to keep as much dirt outside as possible. A two or three stage filter with an oiled foam element is the best way to go.
• Dirt on the outside of the engine acts just like a blanket of insulation and prevents proper cooling. Keep your engine clean.
• Use a fuel filter. Dirt getting Into the fuel will clog the fuel passages in the carburetor and also get those abrasive
particles inside. Keep your engine clean.
•Dirt
will
damage
your
are not covered by the engine manufacturer's warranty.
engine very quickly and repairs for
dirt
36
KEEP IT RICH
The high-speed needle valve is used to adjust the mixture of fuel and air needed to get the optimum performance from your engine. If it's adjusted too lean, your engine will get less fuel than it should.
•You must remember that the engine gets its lubrication from the oil that's in the fuel. If you run it too lean, the engine will not get enough oil to keep the internal parts lubricated, even thought It sounds better.
• Parts will start to run hot and then seize. The result is a typical problem as a broken connecting rod that seized to the crankshaft, and then broke as the crankshaft tried to continue to turn.
• Keep the engine running on the rich side of the highest RPM setting to ensure proper lubrication.
KEEP IT ON THE GROUND
You should run your engine at high speeds only when you are driving the car.
• Do not put the car on the box or stand with the wheels off
the ground and then run the engine.You'll quickly overspeed
your engine and ruin It. Generally, the connecting rod will break from the over-revving.
• Do not remove the engine from the car and try to run it with
just the flyweel. That does the same as described above. The engine must be run with the load of the car when driving.
Page 38
KEEP IT COOL
If you run your engine good and hot, you'll have a nice chunck of useless aluminum in a short time.
•Running the engine hot causes the oil in the fuel to break down and quit working. The repairs won't be cheap.
Your engine is equipped with a special heat-sink cylinder head to
make sure it gets enough cooling..
•Keep the head clean so that the dirt doesn't act like an insulating blanket.
•Make sure that any airflow passes through the fins of the
cylinder and head.
• Make as many cutouts in the car's body as necessary, and don't skimp on the size.
KEEP IT LUBED
Make sure you're using a fuel from a reputable, name-brand manufacturer.
•Your fuel should have at least the amount of oil recommended by the engine manufacturer. If you can't find a particular recommendation on oil content, then use a fuel with 20%-22% oil content.
•If you're trying to run a fuel with more than 20% Nitromelhane, you should add some oil to your fuel, such as KlotzTechniplate™or Baker "AA" Castor Oil".
KEEP IT PROPERLY LUBED DURING STORAGE
If you let your engine sit with nothing done to it after you last ran it, the internal parts will start to corrode... especially the steel crankshaft and ball bearings. They'll rust. If the fuel has castor oil
in It, it will begin to dry out and become gummy.
• Rust inside an engine will erode tight clearances and score
polished surfaces.
• Gummy fuel residue blocks oil holes in connecting rods and
crankshafts.
37
Page 39
GUARANTEED TO
KEEP YOUR R/C CAR
RUNNING WELL
(CONTINUED)
Here's how to prevent rust;
• At the end of the day's running, pull the fuel line from the engine.
• Drain the tank, and then start the engine.
• Let it run until it's absolutely dry of fuel.
•Add several drops of an after-run oil. There are several after-run oils on the hobby market. You can also make your own from a 50-
50 mixture of "Marvel Mystery Oil" and automatic transmission fluid.
•After adding the after-run oil, turn the engine over several times to make sure it's worked into all of the engine's internals. Add more if you are not sure that you put in enough.
(Continued)
KEEP GOOD POWER
Nitro, or Nitromethane, is the main power ingredient in model fuels. Raising the nitro content will make the fuel "hotter"— that is, allow
the engine to develop more power. More is better, right? Not really.
•Unless your engine is designed and ported for high-nitro fuels, you won't see much gain in performance above 20%­25%.
•While some people are running nitro levels as high as 50%, they have modified their engines to handle it. They've also carefully blended their fuel to make sure they have enough oil.
•The best performance enhancer Is a good driver, A driver who can keep the car on the track will usually beat a less experienced driver with a hotter set up.
KEEP IT SMOOTH
When you tighten the pilot shaft onto your flywheel, it can be hard to keep the engine from turning over. It may be tempting to stick something into the exhaust port to keep the piston from moving,
but do not do this! You'll also put a nice "ding" in the piston and in the cylinder liner. You've just ruined your nice, new engine. A new ABC piston/cylinder assembly (the most commonly-used kind in
R/C car engines) will put a nice hole In your pocketbook.
38
Page 40
(CONTINUED)
This kind of damage is not covered under the warranty.
• If the flywheel can't be tightened onto the engine without it trying to turn over, grip the drive washer in a pair of large adjustable pliers, like Channel Locks'", with the drive washer protected under several layers cloth. You could also try a strap wrench.
•If you feel more adventurous, you can remove the rear cover of the engine and insert a piece of wooden dowel stock or plastic rod to keep the crankshaft from turning. Don't put anything into the engine that will hit the piston.
KEEP AWAY FROM
SILICONE SEAL AND
THREAD STICKERS
Silicone sealers usually have a smell like vinegar when they're curing. Vinegar is mostly acetic acid and that causes corrosion.
•The inside of an engine has two kinds of metal in it... aluminum for most of the parts and steel for the crankshaft and bearings.
•Two different kinds of metal will start to corrode if they have some kind of electrolyte between them and a tiny bit of acid will do the job.
• Aluminum corrosion can cause the entire inside of the engine to turn a dark grey or nearly black color. Corroded steel is rust. See above about rust.
KEEP IT DRY
While it sounds obvious, keeping water out of your engine isn't as easy as it sounds. Sure, you can dry it out when you've run
through some mud or puddles, but how about condensation?
•Changes in temperature can cause moisture in the air to
condense inside the engine. This can happen in the winter and summer, so keep your model inside the house, not in the garage.
• Keeping it Inside the house also gives you good reason to
keep it clean just try to explain oil spots on the carpet when your engine is dripping oil from a just-finished running session.
39
© Copyright 1999-3032046
Page 41
40
Page 42
LIMITED
WARRANTY
Your engine is guaranteed to be free of defects in parts and workmanship for a period of 2 years from the date of purchase when returned for service accompanied by Your proof of purchase. Crash damage and problems caused by neglect or abuse will not be covered under warranty. Damagecaused by customer disassembly, tampering, use of substandard fuel, use of incorrect accessories (glow plug, prop, etc.) ,or any use of the engine for which it is not specifically intended will automatically void the warranty of the engine. Should your engine require warranty or non-warranty
service please return it via UPS or
insured Parcel Post to our national servicing facility:
Hobby Services P.O.Box 4021 1610 Interstate Dr. Champaign IL 61821 Ph. 217-398-0007
Along with Your engine and proof of purchase date please enclose a complete written explanation
detailing the problems. State your name and address clearly. For repairs not covered under warranty, you must specify whether you wish the charges to be billed C.O.D. or if you wish to be notified of the charges so you can send a check.
Page 43
Page 44
6-15 3-Chome Imagawa Higashisumiyoshi-ku
Osaka 546-0003, Japan TEL. (06) 6702-0225
URL: http://www.os-engines.co.jp
© Copyright 2004 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 60091540 090400
FAX. (06) 6704-2722
Loading...