O.S. engine MAX-32SX-MX 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

NOTES CONCERING

THE RECOIL STARTER

GLOWPLUG

TOOLS, ACCESSORIES, etc.

CARBURETTOR CONTROLS

STARTING & INITIAL

RUNNING-IN('Breaking-in)

ADJUSTMENT

CARE AND MAINTENANCE

O.S. GENUINE PARTS &

ACCESSORIES

THREE VIEW DRAWING

ENGINE EXPLODED VIEW

ENGINE PARTS LIST

CARBURETTOR EXPLODED VIEW &

PARTS LIST

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 poison-

ous.Donotallowittocomeinto

contactwiththeeyesormouth.

Always store it in a clearly

markedcontainerandoutofthe

reach of children.

Modelenginefuelisalsohighly

flammable. Keep it away from

open flame, excessive heat,

sources of sparks, or anything

else which might ignite it. Do

notsmokeorallowanyoneelse

to smoke, near to it.

Never operate your engine in an en-

closed space. Model engines, like auto-

mobile 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.

•

Never touch, or allow any

object to come into contact

with, the rotating propeller and

do not crouch over the engine

when it is running.

•

This engine was designed for model boats.

Donotattempttouseitforanyotherpurpose.

Mount the engine in your model securely,

following the manufacturers' recommenda-

tions, using appropriate screws and lock-

nuts.

Fit an effective silencer (muffler). Frequent

close exposure to a noisy exhaust

(especially in the case of the most powerful

high-speed engines) may eventually impair

your hearing and such noise is also likely to

causeannoyancetoothersoverawidearea.

Take care that the glowplug clip or battery

leads do not come into contact with the

propeller or any other rotating parts. Also

check that the linkage to the throttle arm is

secure.

If your engine does not have a built-in recoil

starter, use an electric starter. The wearing

of safety glasses is also strongly

recommended.

When handling the boat immediately prior to

launching, be especially cautious.

Keep the propeller and other rotating parts

away from you.

NOTES

•

•For their safety, keep all onlookers

(especially small children) well back (at

least 20 feet or 6 meters) when preparing

your model for running.

•

Adjust the throttle linkage so that the

engine stops when the throttle stick and

trim lever on the transmitter are fully

retarded. Alternatively, the engine may be

stopped by cutting off the fuel supply.

Never try to stop the engine physically.

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.

NOTES

•

If your engine is fitted with a recoil starter,

pull the operating handle straight out when

starting the engine, so that the cord does

not rub against the hull or engine.

This will help prevent the cord from being

damaged by abrasion or engine heat.

•

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.

Do not attempt to disassemble the recoil

starter (if fitted). If you do so, the very

strong spring inside will be suddenly

ejected. This can be very dangerous.

The O.S. MAX-32SX-MX is a high-perfor-

mance water-cooled marine engine for small

radio-controlled boats, especially scale and

sport type hulls. The MAX-32SX-MX incor-

porates a recoil starter system which pro-

vides easy, positive starting, while eliminat-

ing the need for an electric starter and star-

ter-battery.

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. We do not

recommend running your boat on the sea,

or in any other saltwater environment.

Under such conditions, it is difficult to

prevent the engine from becoming

corroded and, eventually, inoperative.

NOTE

•

INSTALLING THE GLOWPLUG

Install the washer on the

glowplug and insert carefully

into cylinder-head, making

sure that it is not cross-

threaded before tightening

firmly.

BASIC ENGINE PARTS

Glow plug

Washer

Carburettor Type 20C Water Cooled Head

Starter Handle

Recoil Starter

Assembly No.4

Beam Mount

Crankcase

Flywheel No.2D

Flywheel

Assembly

INSTALLATION

Make sure that the engine mounting beams in the

hull are parallel, with their top surfaces in the same

plane. If they are not, the engine will not rest firmly

as the engine mounting faces (undersides of the

mounting lugs) are precision machined to be flat

and in the same plane. Poor installation may not

only cause vibration, erratic running and loss of

performance, but may also damage the engine

itself by deforming the crankcase, cylinder, etc.

The mounting beams and adjacent hull structure

should be as rigid as possible so that the engine

may develop its full performance. Use 3mm steel

screws, such as Allen socket-head type, with

locknuts, for bolting the engine to the mounting

beams.

If the holes in the mounting beams do not align

exactly with the engine's mounting lugs, enlarge

them slightly with a needle file so that the mounting

screws pass through the holes smoothly without

being forced.

Chamfer inside edges of bearers.

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.

◆

NOTE: Because, in the interests of personal

safety, dismantling of the starter mechanism

isstrongly 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.)

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).

GLOWPLUG

Since the compatibility of the glowplug and fuel can

have a marked effect on performance and reliability, it

is suggested that the user selects the R/C type plug

found most suitable after practical experiments.

Generally, for a fuel containing about 30%

nitromethane, a medium heat range glowplug will be

suitable.

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.

For higher nitro fuel, a cold rated plug may be

required, whereas, for lower nitro fuel, a hot rated

plug may be best. However, the O.S. No.8 glowplug

may be employed irrespective of the nitro content of

the fuel.

Glowplug life

Install a plug suitable for the engine.

Particularly in the case of very high performance

engines, glowplugs must be regarded as expendable

items. However, plug life can be extended and engine

performance maintained by careful use, i.e.:

Use fuel containing a moderate percentage of

nitromethaneunlessmoreisessentialforracingevents.

When to replace the glowplug

Filament surface has roughened and turned white.

Engine tends to cut out when idling.

Apart from when actually burned out, a plug may

need to be replaced because it no longer delivers its

best performance, such as when:

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

battery connected while adjusting needle.

Foreign matter has adhered to filament or plug

body has corroded.

Filament coil has become distorted.

Starting qualities deteriorate.

TOOLS, ACCESSORIES, etc.

The following items are necessary for operating the

engine.

FUEL

Generally, it is suggested that the user selects a fuel

that is commercially available for model two-stroke

engines and contains between 10% and 30%

nitromethane. As a starting point, we recommend a

fuel containing 10% nitromethane, changing to a fuel

containing more nitro if necessary.

When the brand of fuel is changed, or the nitro

content increased, it is advisable to repeat the

running-in procedure referred to in the RUNNING-IN

paragraphs. For consistent performance and long

engine life, it is essential to use a good quality fuel

containing NOT LESS THAN 18% lubricant. Please

note that with high-nitro fuels, although power may be

increased for competition purposes, glowplug

elements do not last as long and engine life will be

shortened.

REMINDER!

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.

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