O.S. engine MAX-12CV Series Setup guide

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.

●

IF THE ENGINE FAILS TO START

FINALADJUSTMENT

CARBURETTOR CLEANLINESS

CARE AND MAINTENANCE

EXPLODED VIEW &

ENGINE PARTS LIST

CARBURETOR EXPLODED VIEW

& PARTS LIST

O.S. GENUINE PARTS &

ACCESSORIES

THREE VIEW DRAWING

CONTENTS

SAFETY INSTRUCTIONS AND

WARNINGS ABOUT YOUR O.S. ENGINE

INTRODUCTION, BASIC ENGINE PARTS

INSTALLATION

AIR CLEANER TYPE102

NOTES CONCERNING

THE RECOIL STARTER

GLOWPLUG

TOOLS, ACCESSORIES, etc.

CARBURETTOR CONTROLS

PRESSURIZED FUEL SYSTEM

STARTING THE ENGINE &

RUNNING-IN('Breaking-in)

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.

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.

SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE

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 NOTES

These cover events which

might involve serious (in

extreme circumstances, even

fatal) injury.

These cover the many other

possibilities, generally less obvious

sources of danger, but which, under

certain circumstances, may also

cause damage or injury.

WARNINGS

Model engine fuel is poi-

sonous. 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

whichmightigniteit.Donot

smokeorallowanyoneelse

to smoke, near to it.

Never operate your engine in an en-

closed 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.

••

•

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

most 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.

NOTES

•

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 tube from the tank.

•

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 it is rotated over

compression WITHOUT the glowplug

battery being reconnected.

•

Do not attempt to disassemble the

recoil starter of the 15CV-X.

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.

•

INSTALLING THE GLOWPLUG

Carburetor

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.

Fit washer to glowplug and

insert carefully into cylinder-

head, making sure that it is

not cross-threaded

before tightening firmly.

BASIC ENGINE PARTS

The MAX-12CV and MAX-12CV-X are

high-performance engines for 1/10

class R/C racing cars. The MAX-12CV-X

is equipped with a built-in recoil starter

system which eliminates the need for a

separate electric and starter battery.

Crankshaft

Glow plug

Washer

Drive Hub

Crankcase

Beam Mount

Starter Handle

Heatsink Head

Recoil Starter

Assembly No.5

MAX-12CV-X

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.

NOTE:

Where spacers are supplied joined in pairs

(see sketch) separate them as shown.

Either face may be placed downwards.

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.

Mount Spacer

Engine Mount Spacer

Separate

Engine Mount

ー8ー

This is a heavy-duty wet type air cleaner that has

been developed specifically for the O.S. MAX-CV

series model car engines.

It contains specially impregnated filter elements which

prevent highly damaging dust and dirt from being

drawn into the engine through the carburetor, yet

allow engine performance to be maintained for longer

periods between element renewals. The Type 102 air

cleaner has a special rubber body which facilitates

easy yet secure fitting, with positive sealing at the

carburetor air intake.

AIR CLEANER TYPE 102

INSTALLATION OF AIR CLEANER

Carefully clean the carburetor,

removing any old adhesive or

sealant that may have been

previously used on the outside

of the air intake.

•

Press the air cleaner body firmly

over the carburetor air intake. Make sure that the

outer rim of the air intake engages the internal

annular groove in the air cleaner: failure to do so

may result in the air cleaner falling off. See sketch,

right.

•

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

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

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˚

Always remove contaminated elements carefully, to

ensure that dirt cannot enter the carburettor.

Position the air cleaner correctly, so that it does not

foul the cylinder-head or obstruct the needle-valve.

•

AIR CLEANER ELEMENTS

•

Lower Filter

Element Upper Filter

Element

Insert beneath flanges.

Replacement elements

arealreadyimpregnated

withfilteroil.As thisoil is

very sticky, take cere,

whenhandlingelements

to prevent dust or dirt

fromadheringtothem.If

your fingers become

contaminated, wash them with soap and water.

During storage, the oil may have become unevenly

dispersedthrough theelements.Thiswillbe indicated

if the blue colour of the element material appears

patchy. In this case, place the elements in a small

plastic bag and gently rub them between finger and

thumb to redistribute the oil.

REPLACEMENT OF ELEMENTS

It is advisable to replace the upper filter element with

a new one after not more than one hour of running

time. It is not necessary to discard the lower element

as frequently, but be sure to change it when it

becomes soiled.

•

◆

NOTES CONCERNING THE RECOIL STARTER

( 12CV-X ONLY)

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.

This manual suits for next models

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