O.S. engine MAX-12TR Series Einrichtungshandbuch

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

INSTALLATION

AIR CLEANER TYPE 103

GLOWPLUG

TOOLS, ACCESSORIES, etc.

CARBURETTOR CONTROLS

PRESSURIZED FUEL SYSTEM

STARTING THE ENGINE &

RUNNING-IN('Breaking-in)

FINALADJUSTMENT

CARBURETTOR CLEANLINESS

CARE AND MAINTENANCE

O.S. GENUINE PARTS &

ACCESSORIES

ENGINES EXPLODED VIEW &

PARTS LIST

CARBURETTOR EXPLODED VIEW &

PARTS LIST

THREE VIEW DRAWING

MEMO

IF THE ENGINE FAILS TO START

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

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.

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 line 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.

•

INSTALLING THE GLOWPLUG

Carburettor

Install washer on glowplug

and insert carefully into

cylinder-head, making sure

that it is not cross-threaded

before tightening firmly.

BASIC ENGINE PARTS

The MAX-12TR is high-perfomance

engines for 1/10 class R/C racing cars.

There are two verions, the one with 10M

carburettor and the other with 10J

carburettor. The MAX-12TR has a

conventional crankshaft, while the MAX-

12TR(P) employs a special crankshaft

with integral pilot shaft.

Crankshaft

Glow plug

Washer

Drive Hub

Crankcase

Beam Mount

Heatsink Head

Cover Plate

As delivered, the engine has its carburetor

lightly fit into its intake. Secure it changing

its angle according to the car chassis.

NOTE

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.

Standard accessories

Glow Plug A5 Super Air Cleaner 103 Assembly

103 Cleaner Body

103 Filter Elements (2pcs.)

Exhaust seal ring

Instruction manual

MAX-12TR

Exhaust

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.

INSTALLATION OF THE CARBURETTOR

As delivered, the engine has its carburettor

lightly fit into the intake boss. Secure it as

follows.

Loosen the retainer screw, rotate the

carburettor 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 carburettor body.

Rotate the retainer nut

gently until it stops. Tighten a further 60-90˚

Fit the exhaust seal ring supplied.

AIR CLEANER TYPE 103

INSTALLATION OF AIR CLEANER

Carefully clean the carburettor, 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 carburettor 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.

•

It has a single filter element and is intended

primarily for circuit racing. The lower height

of the Super Air-Cleaner 103 also facilitates

easier installation in cars where available

space may be restricted.

Position the air cleaner correctly, so that it does

not foul the cylinder-head or obstruct the needle-

valve.

INSTALLING THE FILTER ELEMENT

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

adheringtotheelement.If

your fingers become

contaminated, wash them

with soap and water.

Duringstorage,theoilmayhavebecomeunevenly

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

asmallplasticbagandgentlyrubitbetweenfinger

and thumb to redistribute the oil.

It is advisable to replace the filter element with a

new one after not more than one hour of running

time. Always remove contaminated elements

carefully, to ensure that dirt cannot enter the

carburettor.

REPLACEMENT OF ELEMENT

Insert beneath flange

•

GLOWPLUG

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 A5, No.8 and R5. Carefully fit plug finger-tight,

before final tightening with the correct size plug

wrench.

Glowplug life

Particularly in the case of very high performance

engines,

glowplugs must be regarded as expendable

items.

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.

However, plug life can be extended and engine

performance maintained by careful use, i.e.:

•

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.

Apart from when actually burned out, a plug may

need to be replaced because it no longer delivers its

best performance, such as when:

When to replace the glowplug

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.

•

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