O.S. engine MAX FXi 46 Einrichtungshandbuch

MAX FXi 46

OWNER’S INSTRUCTION MANUAL

It is of vital importance, before attempting to

operate your engine, to read the general

“SAFETY INSTRUCTIONS AND WARNINGS”

section on pages 2-6 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 aircraft, radio control

equipment, etc., are accessible for checking

at the same time.

SAFETY INSTRUCTIONS AND WARNINGS

ABOUT YOUR O.S. ENGINE ................................3

FEATURES OF FXi SERIES ENGINE ..................7

BEFORE INSTALLING THE ENGINE....................7

BASIC ENGINE PARTS ........................................8

INSTALLATION OF THE ENGINE ........................8

THROTTLE LINKAGE............................................8

MUFFLER..............................................................9

FUEL TANK LOCATION ........................................9

GLOW PLUG ......................................................10

FUEL....................................................................11

PROPELLERS ....................................................12

MIXTURE CONTROLS........................................12

BEFORE STARTING............................................13

STARTING ..........................................................14

RUNNING-IN (Breaking-in)..................................15

NEEDLE VALVE ADJUSTMENT DIAGRAM........17

MIXTURE CONTROL VALVE ADJUSTMENT ....19

REALIGNMENT OF MIXTURE CONTROLVALVE ..19

SUBSEQUENT STARTING PROCEDURE..........20

SUBSEQUENT READJUSTMENT......................20

CARBURETOR CLEANLINESS..........................21

ENGINE CARE & MAINTENANCE ....................22

O. S. ENGINES LIMITED WARRANTY ..............22

ENGINE EXPLODED VIEW ................................24

ENGINE PARTS LIST..........................................25

CARBURETOR EXPLODED VIEW ....................26

CARBURETOR PARTS LIST ..............................26

CONTENTS

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.

The advice which follows is grouped under

two headings according to the degree of

damage or danger which might arise

through misuse or neglect.

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!

These cover events which might involve

serious (in extreme circumstances, even

fatal) injury.

SAFETY INSTRUCTIONS AND

WARNINGS ABOUTYOUR O.S. ENGINE

NOTES!

• This engine was designed for model

aircraft. 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.

• Be sure to use the muffler

supplied with

the engine. Frequent exposure to an

open exhaust may eventually impair

• 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.

WARNINGS!

• 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.

• A weakened or loose propeller may

disintegrate or be thrown off and, since

propeller tip speeds with powerful

engines

may exceed 600 feet (180 meters)

per

second, it will be understood that

such a failure

could result in serious

injury, (see

“NOTES!” section relating to

propeller safety).

• 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 fuel.

• If you fit a spinner, make sure that it is a

precision made product and that the

slots for the propeller blades do not cut

into the blade roots and weaken them.

• Preferably, use an electric starter. The

wearing of safety glasses is also

strongly recommended.

• Discard any propeller which has

become split, cracked, nicked or

otherwise rendered unsafe. Never

attempt to repair such a propeller,

destroy it. Do not modify a propeller in

any way, unless you are highly

experienced in tuning propellers for

specialized competition work such as

pylon racing.

• Take care that the glow plug clip or battery

leads do not come into contact with the

propeller. Also check the linkage to the

throttle arm.A disconnected linkage could

also foul the propeller.

your hearing.Such noise is also likely to

cause annoyance to others over a

wide area.

• If you remove the glow plug from the

engine and check its condition by

connecting the battery leads to it, do not

hold the plug with bare fingers. Use an

appropriate tool or a folded piece of cloth.

• Install a top-quality propeller of the

diameter and pitch specified for the

engine and aircraft. Locate the propeller

on the shaft so that the curved face of the

blades face forward–i.e.in the direction of

flight. Firmly tighten the propeller nut,

using the correct size wrench.

• Always check the tightness of the

propeller nut and retighten it, if

necessary, before restarting the engine,

particularly in the case of four-stroke

engines. If a safety locknut assembly is

provided with your engine, always use

it. This will prevent the propeller from

flying off in the event of a "backfire",

even if it loosens.

Do not start your engine in an area

containing loose gravel or sand. The

propeller may throw such material in

your face and eyes and cause injury.

For their safety, keep all onlookers

(especially small children) well back (at

least 20 feet or 6 meters) when

preparing your model for flight. If you

have to carry the model to the take-off

point with the engine running, be

especially cautious. Keep the propeller

pointed away from you and walk well

clear of spectators.

•Warning! Immediately after a glow plug

ignition engine has been run and is still

warm, conditions sometimes exist

whereby it is just possible for the engine

to abruptly restart if the propeller is

casually flipped over compression

WITHOUT the glow plug battery being

reconnected. Remember this if you

wish to avoid the risk of a painfully

rapped knuckle!

NOTES!

• 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.

• Take care that loose clothing (ties, shirt

sleeves, scarves, etc.) do not come into

contact with the propeller. Do not carry

loose objects (such as pencils,

screwdrivers, etc.) in a shirt pocket from

where they could fall through the

propeller arc.

• After starting the engine, carry out any

needle-valve readjustments from a safe

position behind the rotating propeller.

Stop the engine before attempting to

make other adjustments to the

carburetor.

This range of engines is ideally suited to a

variety of R/C aircraft, including trainer,

sports, acrobatic and scale types.

A separate precision-made needle-valve

unit is installed at the rear, where manual

adjustment is safely remote from the

rotating propeller.

Common Accessories

No. 8 Glow Plug, Silicone Tube, Instruction

Manual.

Note: With these engines, 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 intended running temperature.

Installing the Glow Plug

Carefully insert plug, with washer, finger

tight only, before final tightening with the

correct size plug wrench.

Connecting the Fuel Tubing

Connect the short length of fuel tubing

(supplied) securely between the needle-

valve outlet and carburetor inlet as shown in

the illustration on the next page.

In the event of the tubing becoming

damaged, it should be replaced with a

suitable length (as indicated below) of best

quality 5mm OD x 2mm ID silicone tubing.

Use similar material to connect the fuel inlet

nipple to the fuel tank.

BEFORE INSTALLING THE ENGINE

FEATURES OF FXi SERIES ENGINE

Installation in the Model

Make sure that the mounting beams are

parallel and that their top surfaces are in the

same plane.

• Before connecting the throttle-

lever/servo linkage, make sure that no

part of the linkage interferes with the

internal structure of the aircraft or

wiring, etc., when the throttle is fully

open or fully closed.

• Set the throttle lever linkage so that the

throttle rotor is (a) fully open when the

transmitter throttle stick is fully

advanced and (b) fully closed when the

THROTTLE LINKAGE

INSTALLATION OF THE ENGINEBASIC ENGINE PARTS

throttle stick is fully retarded.

Adjustment of the throttle rotor opening

at the idling position can then be made

with the throttle trim lever on the

transmitter. (Select throttle-lever and

servo-horn hole positions that will

avoid excessive pushrod travel causing

the throttle to bind at either end.)

Note: When adjusting the throttle lever

angle, relative to the rotor, hold the rotor

at about half-way between the open and

closed positions while loosening and

tightening the fixing screw, otherwise

the rotor, rotor guide screw, throttle stop

screw or carburetor body may become

burred and damaged.

The exhaust outlet of the silencer can be

rotated to any desired position in the

following manner:

1) Loosen the locknut and assembly screw.

2) Set the exhaust outlet at the required

position by rotating the rear part of

the silencer.

3) Re-tighten the assembly screw,

followed by the locknut.

Note: The standard expansion-chamber

type silencer is quite effective, but

reduces power to some degree.

Reminder: 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.

Keep your hands and face away from

exhaust gas or you will suffer a burn.

Suggested fuel tank capacities are listed

opposite.These will allow 12-13 minute flights.

Locate the fuel tank so that the top of the

FUEL TANK LOCATION

MUFFLER

tank is 5-10mm (1/4-3/8") above the level of

the needle valve.

Be sure to use a pressurized fuel system by

connecting the muffler pressure nipple to

the vent pipe of the fuel tank.

Since the glow plug and fuel combination used

may have a marked effect on performance and

reliability, it would be worthwhile to experiment

with different plug types.

Recommended O.S. plugs are Nos. 8, A5

and A3. Carefully install plug finger-tight,

before final tightening with the correct size

plug wrench.

The Role of the Glow Plug

With a glow plug 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 becomes cooler and

ignition is retarded.

Glow Plug Life

Particularly in the case of very high

performance engines, glow plugs must be

regarded as expendable. However, plug life

can be extended and engine performance

maintained by careful use, i.e.:

• Install a plug suitable for the engine.

• Use fuel containing a moderate

percentage of nitro methane 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.

GLOW PLUG

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