O.S. engine MAX-15LD 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.

●

CONTENTS

SAFETY INSTRUCTIONS AND

WARNINGS ABOUT YOUR O.S. ENGINE

INTRODUCTION, BASIC ENGINE PARTS

ENGINE SHIELD, INSTALLATION

THROTTLE LINKAGE

AIR CLEANER

NOTES CONCERNING

THE RECOIL STARTER

GLOWPLUGS

TOOLS, ACCESSORIES, etc.

CARBURETOR CONTROLS

STARTING THE ENGINE &

RUNNING-IN('Breaking-in)

IF THE ENGINE FAILS TO START

FINALADJUSTMENT

CARBURETOR CLEANLINESS

CARE AND MAINTENANCE

PARTS REPLACEMENT

EXPLODED VIEW &

ENGINE PARTS LIST

CARBURETOR EXPLODED VIEW

& PARTS LIST

O.S. GENUINE PARTS &

ACCESSORIES

THREE VIEW DRAWING

MEMO

515

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 12LD-X and 15LD-

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

Fit washer to glowplug and

insert carefully into cylinder-

head, making sure that it is

not cross-threaded

before tightening firmly. Glow plug

Washer

ENGINE SHIELD

If the engine shield has to be removed, e.g. for

access to the carburettor, etc., apply a little

LOCTITE liquid

polymer sealant to the

two crankcase lug

screw holes when

reinserting the fixing

screws.UseLOCTITE

sparingly, as excess

sealant will have a

deleterious effect on

the shield material.

Apply a little LOCTITE

to these screw holes.

INSTALLATION OF ENGINE

Make sure that the chassis is flat and free from

flaws or dirt. The recommended screws for

securing the engine to the chassis are 3mm (8

to 10mm long ).

In the case of the 12/15LD-X, fit the engine

mount spacers between the engine and

chassis to avoid interference between starter

housing and chassis.

Divide the spacers into lengths.

Mount Spacer

Separate

Mount Spacer

Chassis

3mm Screw

INSTALLATION OF E-1000 SILENCER (12/15LD

(

)

.LD-X

(

)

Fit the nipple (supplied) to

the silencer, applying heat-

resistant epoxy sealant at

the roor of the fitting (See

sketch).

Before installing the engine

in the chassis, secure the silencer to the en-

gine with M3X27mm screws.

Seal here applying

heat-resistent

epoxy sealant.

MODIFICATION OF O.S. E-1000 SILENCER FOR

PRESSURIZED FUEL SUPPLY

•

THROTTLE LINKAGE

The throttle-arm ball-link is adjustable. Loosen

3mm set-screw and adjust the link so that link-

age rod and upper plate become parallel, and

then retighten it securely.

If the linkage rod and upper plate are not paral-

lel, throttle valve will not move smooth-ly and

may dam-age the carburettor.

Adjust the ball link position so that

linkage rod and upper plate become

parallel by loosening 3mm set-screw.

Upper plate

Throttle servo

3mm set-screw Chassis

AIR CLEANER

The air cleaner of this engine is integrated with

the engine shield. It contains a specially im-

pregnated filter element which prevents highly

damaging dust and dirt from being drawn into

the engine through the carburettor.

An O-ring is fitted between the engine shield

and carburettor to exclude air leaks.

•

◆

NOTES CONCERNING THE RECOIL STARTER

( 12/15LD-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.

FILTER ELEMENT AND ITS REPLACEMENT

The elements are already impregnated with a

special filter oil. As this oil is very sticky, take care,

when handling them, to prevent dust or dirt from

adhering to the elements. If your fingers become

contaminated, wash them with soap and water.

During storage, the filter oil may become unevenly

dispersed through the element. This will be

indicated if the blue colour of the element material

appears patchy. In this case, place element in a

small plastic bag and gently rub it between finger

and thumb to redistribute the oil.

When fitting the element, be careful not to leave

spaces through which foreign matter may be

drawn.

It is advisable to replace the

element with a new one

after not more than one

hour of running time.

Always remove con-

taminated element carefully,

to ensure that dirt cannot

enter the carburettor.

Be careful not to

leave gaps.

Glowplug life

Particularly in the case of very high performance engines,

glowplugs must be regarded as expendable items.

Fit a plug suitable for the engine.

Use fuel containing a moderate percentage of

nitromethane unless more is essential for racing

events.

Do not run the engine too lean and do not leave the

battery connected while adjusting the needle.

However, plug life can be extended and engine

performance maintained by careful use, i.e.:

•

GLOWPLUGS

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.

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 No.8, A3, and A5. Carefully fit plug finger-tight,

before final tightening with the correct size plug

wrench.

The starter prevents the engine from being

rotated in the wrong direction.The unit will

be damaged if you attempt to force the fly-

wheel in the opposite direction (i.e. clock-

wisewhen viewed fromthecrankshaft end).

NOTE:

Because, in the interests of personal safety,

dismantling of the starter mechanism is

strongly discouraged, the Recoil Starter is

available for replacement only as a pre-

assembled unit.

However, some related parts, such as

Starting Shaft and Rear Adaptor, are

obtainable separately. (See Parts List.)

◆

This manual suits for next models

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