O.S. Engines 12TR 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.

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Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine.

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Keep these instructions in a safe place so that you may readily refer to them whenever necessary.

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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)

10 11

2~5

12 12

IF THE ENGINE FAILS TO START FINAL ADJUSTMENT

CARBURETTOR CLEANLINESS

CARE AND MAINTENANCE

O.S. GENUINE PARTS &

ACCESSORIES ENGINES EXPLODED VIEW &

PARTS LIST CARBURETTOR EXPLODED VIEW &

PARTS LIST THREE VIEW DRAWING MEMO

24 26

16 17

27 28

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.

NOTES

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 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.

•

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.

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.

NOTES

•

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.

•

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.

NOTES

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 MAX12TR(P) employs a special crankshaft with integral pilot shaft.

Standard accessories

Glow Plug A5 Exhaust seal ring Instruction manual

Super Air Cleaner 103 Assembly

103 Cleaner Body 103 Filter Elements (2pcs.)

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.

NOTE As delivered, the engine has its carburetor lightly fit into its intake. Secure it changing its angle according to the car chassis.

BASIC ENGINE PARTS

Heatsink Head

Carburettor

Crankshaft

Drive Hub

INSTALLING THE GLOWPLUG

Install washer on glowplug and insert carefully into cylinder-head, making sure that it is not cross-threaded before tightening firmly.

Beam Mount

Crankcase

Glow plug

MAX-12TR

Exhaust

Cover Plate

Washer

Fit the exhaust seal ring supplied.

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

1. 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

2. 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˚

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.

AIR CLEANER TYPE 103

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.

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.

Position the air cleaner correctly, so that it does

•

not foul the cylinder-head or obstruct the needlevalve.

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 adhering to the element. If your fingers become contaminated, wash them with soap and water.

During storage, the oil may have become unevenly

•

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 it between finger and thumb to redistribute the oil.

Insert beneath flange

REPLACEMENT OF ELEMENT

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.

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