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It  is  of  vital  importance,  before  attempting  to 
operate  your  engine,    to  read  the  general 

'SAFETY  INSTRUCTIONS  AND  WARNINGS' 

section  on  pages  2-4  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.

Inline four-cylinder overhead-valve
four-stroke-cycle engine

1

 

SAFETY INSTRUCTIONS AND 
WARNINGS ABOUT YOUR O.S. ENGINE

NOTES WHEN APPLYING AN 
ELECTRIC STARTER

ABOUT THE ENGINE

ENGINE PARTS NAME

INSTALLATION 

FUEL TANK & LINES

GLOWPLUG

MIXTURE CONTROLS

PROPELLER 

GLOWPLUG HEATING 

FUEL AND LUBRICATION

CONTENTS

STARTING

RUNNING-IN ("Breaking-in")

THROTTLE VALVE ADJUSTMENT

FLIGHT & MAINTENANCE 

VALVE  CLEARANCE ADJUSTMENT

ENGINE EXPLODED VIEW 

ENGINE PARTS LIST

CARBURETOR EXPLODED VIEW
& PARTS LIST

O.S. GENUINE PARTS & ACCESSORIES

ENGINE THREE VIEW DRAWINGS

2-4

5

6

7-8

9-10

11

12

13

14-15

16-17

18

19-22

23

24-26

27

28-29

30

31

32

33

34

Summary of Contents for IL-300

Page 1: ... the aircraft radio control equipment etc are accessible for checking at the same time Inline four cylinder overhead valve four stroke cycle engine 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE NOTES WHEN APPLYING AN ELECTRIC STARTER ABOUT THE ENGINE ENGINE PARTS NAME INSTALLATION FUEL TANK LINES GLOWPLUG MIXTURE CONTROLS PROPELLER GLOWPLUG HEATING FUEL AND LUBRICATION CONTENTS STARTING...

Page 2: ... 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 3 NOTES This engine was designed for model aircraft Do not attempt to use it for any other purp...

Page 3: ...ontaining 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...

Page 4: ...e ABOUT THE ENGINE STANDARD ACCESSORIES Glow Plug Type F installed on the engine Valve adjusting tool kit 4pcs Exhaust Pipe Assembly Exhaust Pipe Exhaust Pipe Lock Nut Exhaust Gasket Feeler gauge 0 04mm Feeler gauge 0 1mm Hex key 1 5mm Wrench 5mm Booster Cable Set Leads for glow plug with clip Lead for earth ground 4pcs 1pc Radial Motor Mount Set Mount attachment Screws Engine mounting screws M5X2...

Page 5: ...uggested that one be fabricated as per the illustration NOTE O S does not offer the extension cable as an accessory item Do not use an excessively long unsupported extension as this may vibrate and cause the needle valve setting to vary or even damage the needle valve thread Always provide a suitable support at the outer end It is essential that the firewall is strong and rigid e g at least 15mm t...

Page 6: ...eze bottle Dirt and fibrous matter mostly accumulate here Dirt and fibrous matter mostly accumulate here Needle valve holder 11 FUEL TANK LINES Make sure that the tank is well rinsed out with methanol or glow fuel before installation and that the pickup weight is well clear of the bottom of the tank when held vertically Locate the fuel tank as close as possible to the carburetor or the fuel level ...

Page 7: ...e maximum power at full throttle this establishes the basic fuel air mixture strength The correct mixture is then maintained by the carburetor s built in automatic mixture control system to cover the engine s requirements at reduced throttle settings The Mixture Control Valve This meters fuel flow at part throttle and idling speeds to ensure reliable operation as the throttle is opened and closed ...

Page 8: ...ed too lean or under an excessively heavy load Obviously this can be very hazardous To eliminate such dangers the O S Safety Locknut Assembly was devised Install this as follows To be equal To be equal Ream to 13 5mm dia Use a propeller that has a hub of more than 40mm dia Ream the propeller shaft hole to 13 5mm bore with an appropriate reamer checking that the hole is exactly centered Install the...

Page 9: ...ficient capacity Install Ni Cd battery in the fuselage and switch on or off by means of transmitter On board battery 1 2 volt Ni Cd battery with more than 10 Ah capacity 1 A commercially available glowplug heating source will enable you to turn the current on or off by using a transmitter auxiliary channel establishing a more reliable idle 17 If glowplug leads are extended together as a single cab...

Page 10: ...t escapes through the breather Make a habit of draining out the excess oil in the crankcase at the end of each flying session Leaving contaminated oil in the crankcase for a long time will cause rust Also residual castoroil will tend to solidify and lock the engine Inject corrosion inhibiting oil into the crankcase to neutralize the effects of any remaining contaminants Rear Housing Breather Nippl...

Page 11: ...battery to the glowplug Electric starter Make sure that the direction or rotation is correct 21 When the engine starts open the throttle valve fully and keep it running initially approx 10 seconds with original needle valve setting 6 Open the throttle fully Make sure that all four cylinders are firing 7 The engine is running properly if white smoke is emitted through all four exhaust pipes A sligh...

Page 12: ...e throttle lever as well as trim lever on the transmitter are fully pulled down How to stop the engine Pull down the throttle lever and trim lever on the transmitter fully 23 RUNNING IN Breaking in Obtain an 18x12 or 20x8 propeller for running in 1 2 1 Running in on the ground Start the engine Set the needle valve 500 1 000r p m lower than maximum r p m setting and run approx 10 seconds It is sugg...

Page 13: ...eed for 5 seconds Does the engine stop Apply full throttle Does the engine regain full power immediately OK Re set the idle speed a little higher Set the throttle opening by means of the throttle trim on the transmitter so that the lowest practical speed without risk of the engine stopping is obtained The position where the lowest possible r p m with steady running is obtained Approx 40 open from ...

Page 14: ... idle speed Make sure that engine is fully warmed up Please pay attention to the matters described below to ensure that your engine serves you well in regard to performance reliability and long life As previously mentioned it is vitally important to avoid operating the engine in conditions where dust disturbed by the propeller may be deposited on the engine and enter its working parts Remember to ...

Page 15: ...Valve 3 Note If the gap is found to be less than 0 04mm it is not necessary to readjust the clearance if the engine has good compression and starts easily Equally if the gap exceeds 0 1mm but is not more than 0 14mm i e the thickness of both feeler gauges inserted together it is not necessary to readjust the clearance if the engine runs satisfactorily Fig 1 If a clearance is found to be outside ei...

Page 16: ...6504210 46504100 46504200 44014010 45269000 45269100 45069200 44003400 44003200 44006000 46505000 44003100 46503300 46503400 23325340 79872035 46581000 46568300 45515000 46568000 46568100 46568200 31 PARTS LIST The specifications are subject to alteration for improvement without notice Description Code No No Description Code No No Rocker Arm Assembly 1pair Rocker Arm 1pc Tappet Adjusting Screw Roc...

Page 17: ...lder Assembly Ratchet Spring Throttle Lever Retaining Screw Throttle Lever Carburetor Rotor Mixture Control Valve Assembly O Ring 2pcs Roter Guide Screw Fuel Inlet Nipple No 1 Carburetor Body Carburetor Rubber Gasket Carburetor Retaining Screw 10pcs 33 72200130 46210300 71531000 72403050 79870050 55500004 71521000 79871010 79871110 79871120 79871145 71531010 79871070 M2 6x7 M3x8 M3x10 M3x14 M3 5x1...

Page 18: ...t Bore Stroke PracticalR P M Output Weight 43 116 48 6 43 33 76 40 50 90 72 113 78 5 96 80 133 173 40 40 40 113 234 3 40 121 3 43 29 C Copyright 2006 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan 60091870 110803 TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan URL http www os engines co jp ...

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