O.S. Engines 18CV-RX User Manual

It is of vital importance, before attempting to operate your engine, to read the general
'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-5 of this booklet and to strictly adhere to the advice contained therein.
Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine.
Keep these instructions in a safe place so that you may readily refer to them whenever necessary.
It is suggested that any instructions supplied with the vehicle, radio control equipment, etc., are accessible for checking at the same time.
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
INTRODUCTION
BASIC ENGINE PARTS
INSTALLATION
SUPER AIR CLEANER 203
NOTES CONCERNING THE RECOIL STARTER
GLOWPLUG
TOOLS, ACCESSORIES, etc.
CARBURETOR CONTROLS PRESSURIZED FUEL SYSTEM
CONTENTS
STARTING THE ENGINE &
2-5
8-9
9-11
11-12
12-13
13-14
15 15
RUNNING-IN ('Breaking-in)
IF THE ENGINE FAILS TO START
6
FINAL ADJUSTMENT
7
CARBURETOR CLEANLINESS
CARE AND MAINTENANCE
ENGINES EXPLODED VIEW & PARTS LIST
CARBURETOR EXPLODED VIEW & PARTS LIST
O.S. GENUINE PARTS & ACCESSORIES
THREE VIEW DRAWING
MEMO
1
16-17
18
18-19
20
21
22-25
26-27
28-29
30-31
32
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
Remember that your engine is not a "toy", but a highly efficient internal­combustion machine whose power is capable of harming you, or others, if it is misused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at some future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner.
The advice which follows applies basically to ALL MODEL ENGINES and is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect.
WARNINGS
These cover events which might involve serious (in extreme circumstances, even fatal) injury.
WARNINGS
Model engine fuel is poi­sonous. Do not allow it to come into contact with the eyes or mouth. Always store it in a clearly marked con­tainer and out of the reach of children.
Model engine fuel is also highly flammable. Keep it away from open flame, excessive heat, sources of sparks, or anything else which might ignite it. Do not smoke or allow anyone else to smoke, near to it.
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
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
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.
Fit an effective silencer (muffler). Frequent close exposure to a noisy exhaust (especially in the case of the more powerful highspeed engines) may eventually impair your hearing and such noise is also likely to cause annoyance to others over a wide area.
The wearing of safety glasses is also strongly recommended.
Take care that the glowplug clip or battery leads do not come into contact with rotating parts. Also check that the linkage to the throttle arm is secure.
For their safety, keep all onlookers (especially small children) well back (at least 20 feet or 6 meters) when preparing your model for running.
4
NOTES
To stop the engine, fully retard the throttle stick and trim lever on the trans-mitter, or, in an emergency, cut off the fuel supply by pinching the fuel delivery line from the tank.
Do not attempt to disassemble the recoil starter of the 18CV-RX. If you do so, the very strong spring inside will be suddenly ejected. This can be very dangerous.
Do not extend the starter cord more than 45cm (18"). Do not abruptly release the operating handle. Allow the cord to rewind smoothly while still holding the handle.
Pull the operating handle straight out when starting the engine, so that the cord does not rub against the vehicle body or engine. This will help prevent the cord from being damaged by abrasion or engine heat.
Warning! Immediately after a glowplug­ignition engine has been run and is still warm, conditions sometimes exist whereby it is just possible for the engine to abruptly restart if it is rotated over compression WITHOUT the glowplug battery being reconnected.
5
INTRODUCTION
The MAX-18CV -R and MAX-18CV-RX are high-perfomance engines for 1/10 class R/C cars. The 18CV -RX is a recoil starter version. Newly developed 11G slide valve carburetor is equipped.
Standard accessories
Glow Plug No.8 Super Air Cleaner 203 Assembly
Engine Mount Spacer (for 18CV-RX)
Instruction manual
NOTE:
As delivered, the engine has its carburetor lightly fit into its intake. Secure it changing its angle according to the car chassis.
NOTE: With this engine, the piston will feel tight at the top of its stroke when the engine is cold. This is normal. The piston and cylinder are designed to achieve a perfect running clearance when they reach their normal running temperatures.
About Head Gasket
These engines are fitted with two head gaskets of 0.1mm thick and 0.2mm thick. It is suggested to adjust the total thickness according to atmospheric temperature, humidity and glowplug used.
At early stage of running-in, when a glowplug tends to burn out early or when high nitromethane content fuel is used, try to run the engine as it is.
When low nitromethane content fuel is used, try to run the engine removing a 0.1mm gasket.
6
BASIC ENGINE PARTS
Carburetor
Beam Mount
Crankshaft
Drive Hub
Crankcase
Heatsink Heat
Starter Handle
Recoil Starter Assembly No.5
MAX-18CV-RX
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
7
INSTALLATION OF THE CARBURETOR
As delivered, the engine has its carburetor lightly fit into the intake boss. Secure it as follows.
Loosen the retainer screw, rotate the
1. carburetor to its correct position and make sure that it is pressed well down into the intake boss, compressing the rubber gasket, before retightening screw.
Rotate the retainer screw gently until it
2. stops, then tighten a further 60-90˚. Do not overtighten the screw as this will damage the carburetor body.
Rotate the retainer nut gently until it stops.
Tighten a further 60-90˚
8
ENGINE INSTALLATION
Make sure that the vehicle's engine mounting surfaces are level and in the same plane. Poor installation may cause distortion of the crankcase, bearings, etc., resulting in erratic running and loss of performance. The recommended screws for securing the engine are 3mm or 4-40 steel Allen hexagon socket type. If existing holes in the engine mount do not align perfectly with engine mounting lugs, enlarge them slightly with a needle-file so that screws enter vertically.
Chassis
Chamfer inside edges of bearers.
Avoid forcing the screws. Secure with locknuts. If the bottom of the recoil starter housing would otherwise touch the car chassis, fit the engine mount spacers (supplied) between the engine's mounting lugs and the engine mount. Use the M3x15 screws provided. With some vehicles, it may be necessary to make minor trimming modifications to chassis or body when fitting the engine.
NOTE: Where spacers are supplied joined in pairs (see sketch) separate them as shown. Either face may be placed downwards.
Mount Spacer
Separate
Engine Mount
Engine Mount Spacer
AIR CLEANER TYPE 203
This is a heavy-duty wet type air cleaner that has been developed specifically for 3.5cc 'off-road' model car engines. It is more compact than the former O.S. SUPER AIR CLEANER 202 and this makes it easier to install within a car body.
203 Intake Elbow
Element Base
Filter Element
End Plate
Retaining Screw
NOTE: The element is already impregnated with a special filter oil. As this oil is very sticky, take care, when handling it, to prevent dust or dirt from adhering to the element. If your fingers become contaminated, wash them with soap and water.
9
"O" Ring
ASSEMBLY
Insert the filter element on the element base.
Fit the end plate with retaining screw, making sure that the element fits correctly between the end plate and base.
Insert the joint pipe on the element base and secure it with "O" ring.
Fit the end plate, retaining screw, making sure that the element fits correctly between the end plate and base.
Element misaligned
REPLACMENT OF ELEMENT
NOTE: During storage, the oil may have become unevenl y dispersed through the element. This will be indicated if the blue colour of the element material appears patchy. In this case, place the element in a small plastic bag and gently rub the element between finger and thumb to redistribute oil.
It is advisable to replace the filter element after each hour of running time. Be careful not to enter the dirt and dust into the carburetor.
INSTALLATION
Carefully clean the carburettor, removing any old adhesive or sealant that may have been previously used on the outside of the air intake.
"O" Ring
10
FURTHER PRECAUTIONS
When removing the air cleaner, check the inside of the element base and carburetor venturi. If any dirt is detected, this indicates that the filter element was incorrectly fitted or should have been replaced earlier. In this event, it is vitally important to wash out the inside of the engine thoroughly, with alcohol or fuel, before it is used again, otherwise rapid wear of the piston/cylinder assenbly, bearings, connecting-rod, etc., will occur. Obviously, it will be necessary to carry out the same procedure with the air cleaner and to replace the filter element.
NOTE: Be careful not to splash alcohol or fuel over the
filter element, or the filter oil will be washed away, and the filter capacity will be lowered.
NOTES CONCERNING THE RECOIL STARTER
REMINDER!
Do not attempt to disassemble the recoil starter.
◆
If you do so, the very strong spring inside will be suddenly ejected. This can be very dangerous.
◆
Do not extend the starter cord more than 45cm(18"). Do not abruptly release the operating handle. Allow the cord to rewind smoothly while still holding the handle.
◆
Pull the operating handle straight out when starting the engine, so that the cord does not rub against the vehicle body or engine.
This will help prevent the cord from being
◆
damaged by abrasion or engine heat. Try to avoid spilling fuel over the starter unit and
◆
its cord. Some fuels have a detrimental effect on these parts.
The starter prevents the engine from being ro­tated in the wrong direction.The unit will be damaged if you attempt to force the flywheel in the opposite direction (i.e. clockwise when viewed from the crankshaft end).
11
( 18CV-RX ONLY)
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