Table of Contents
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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 2-5 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
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It is suggested that any instructions supplied
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Table of Contents
Related Manuals for O.S. engine MAX-61SX-H RING WC Series
Summary of Contents for O.S. engine MAX-61SX-H RING WC Series
- Page 1 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.
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Page 2: Table Of Contents
CONTENTS SAFETY INSTRUCTIONS AND WARNINGS SUBSEQUENT READJUSTMENTS ABOUT YOUR O.S. ENGINE CARBURETTOR CLEANLINESS INTRODUCTION ADJUSTING CHART BASIC ENGINE PARTS, INSTALLATION OF THE CARBURETOR INSTALLATION OF THROTTLE SERVO CARE AND MAINTENANCE INSTALLATION OF THE ENGINE ENGINE EXPLODED VIEW & BEFORE STARTING... -
Page 3: Safety Instructions And Warnings About Your O.s. Engine
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. - Page 4 WARNINGS • Never touch, or allow any • Never operate your engine in an en- object to come into contact closed space. Model engines, like auto- mobile engines, exhaust deadly carbon- with, the rotating parts. monoxide. Run your engine only in an open area.
- Page 5 NOTES • • These engine were designed for model After starting the engine, carry out any needle- helicopters. Do not attempt to use it for any valve readjustments after stopping the rotor by other purpose. closing the throttle to the lowest r.p.m.. Stop the engine before attempting to make •...
- Page 6 NOTES • Take care that loose clothing (ties, shirt sleeves, scarves etc.) do not come into contact with the rotor. Do not carry loose objects (such as pen- cils, screwdrivers, etc.) in a shirt pocket from where they could fall through the rotor disc. •...
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Page 7: Introduction
INTRODUCTION Note: The MAX-61SX-H RING "WC" is an up-rated Because initial tightness, version of the MAX-61SX-H RING helicopter standard electric starter may have engine. aimed World difficulty in rotating the engine when Championship(hence the suffix 'WC') Class cold, before it has been adequately run-in. -
Page 8: Basic Engine Parts
INSTALLING THE GLOWPLUG BASIC ENGINE PARTS Install the washer on the Glowplug glowplug screw Heatsink Head carefully into cylinder- head, making sure that it cross-threaded Glow plug Carburettor Washer before tightening firmly. Typr 60B INSTALLATION OF THE CARBURETOR As delivered, the engine has its carburetor lightly Cover Plate fitted into its intake boss. -
Page 9: Installation Of The Engine
INSTALLATION OF THE ENGINE The under-surfaces of all O.S. engine beam CORRECT mounting lugs are precision machined flat and exactyly parallel to the engine's horizontal axis. It is essential that the engine mounts in the model are also accurately made and aligned. If they are not,... -
Page 10: Before Starting
Warning (Very hot) BEFORE STARTING Never touch Tools, accessories, etc. nichrome wire The following items are necessary for operating the while the battery engine. is connected. 1 Fuel Resistance coil Model glowplug engine fuel of good quality, preferably (nichrome wire) Battery leads containing a small percentage of nitromethane. - Page 11 8 Silicone tubing 6 Fuel bottle or pump Silicone tube This required For filling the fuel tank, a simple, connection between the fuel polyethylene "squeeze" bottle, with tank and engine. Fuel bulb a suitable spout,is all that is required. Alternatively, one of the 9 Hexagon starting shaft purpose-made manual or electric This shaft mounted on an...
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Page 12: Facts About Glowplugs
However, plug life can be extended and engine FACTS ABOUT GLOWPLUGS performance maintained by careful use, i.e.: Since the compatibility of glowplug and fuel may have • Install a plug suitable for the engine. a marked effect on performance and reliability, it may •... -
Page 13: Fuel,Carburetor Controls 12
FUEL CARBURETOR CONTROLS Select, by practical tests, the most suitable fuel from With a fixed-wing model, power failure is rarely a among the best quality fuels available in your country serious threat to the safety of the aircraft since it can for helicopter use. -
Page 14: Starting 13
The Medium Speed Needle Valve This is an extra control that can be brought into play, if necessary, after adjusting A and B above. It STARTING provides the means of fine-tuning mixture strength Be sure to use a muffler pressurized fuel feed. Use over that all-important part of a helicopter's throttle the same fuel as you intend to employ for actual range where the model is flying in, or near, the... - Page 15 Preparation of starting 3. Preparation of the starter Make sure that the transmitter Install the starting shaft to the throttle stick is at the fully closed starter securely. Poor installation position and the throttle trim at center swings the starting shaft, which is position, and make sure that idle-up dangerous.
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Page 16: Running-In,Adjustment 15
NOTE: short and simple running-in procedure is required and can be carried out with the engine installed in the If the throttle response is poor or the engine stops due to a temporarily over-rich mixture im- model. For the first few flights with a new engine i.e. -
Page 17: Before Starting
• This carburetor is not fitted with a throttle stop Idle Mixture Control Screw. A special technique is screw. Instead, idling speed is adjusted by required here. If intending to make an adjustment means of the throttle trim lever on the trans- (e.g. - Page 18 lf, on the other hand, the mixture is too Iean, this When satisfactory hovering flight has been wiIl be indicated by a marked lack of exhaust achieved, land the modeI again and re-check the smoke and a tendency for the engine to cut out engine's idlling qualities.
- Page 19 Now adjust the High-Speed Needle Valve to It is at this point that the Medium Speed Needle achieve the best performance when the model is Valve, previously kept one turn open, may be flying at full throttle. lf, at full throttle, acceleration brought into operation.
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Page 20: Subsequent Readjustments
SUBSEQUENT READJUSTMENTS CARBURETOR CLEANLINESS Once the engine has been run-in and the carburetor The correct functioning of the carburetor depends on controls properly set up, it should be unnecessary to its small fuel orifices remaining clear. alter the mixture settings, except to make minor The minute particles of foreign matter that are present changes to the Main (High-Speed) Needle Valve in any fuel can easily partially obstruct these orifices... -
Page 21: Adjusting Chart
ADJUSTING CHART High Speed Needle Valve - 2 turns opened from fully closed position. Medium Speed Needle Valve - 1 turns opened from fully closed position. Idle Mixture Control Screw - 2 turns opened from fully closed position. Start the engine Warm up the engine Observe the mixture condition while "floating"... -
Page 22: Installation Of Throttle Servo
your refueling container, will prevent the entry of INSTALLATION OF THROTTLE SERVO foreign material into the fuel tank. It is also After the engine in the helicopter, please observe the recommended that a good in-line filter be installed following recommendations when linking the throttle between the tank and carburetor. -
Page 23: Engine Exploded View & Parts List 22
61SX-H "WC" EXPLODED VIEW MAX- RING C.M3.5X15 C.M3.5X8 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw... -
Page 24: Parts List
61SX-H "WC" ENGINE PARTS LIST MAX- RING Description Code No. Heatsink Head 27904200 Cylinder Liner 27953100 Piston Ring 26703404 Piston 27903200 Piston Pin 26606008 Piston Pin Retainer 27917000 Connecting Rod 27905000 Carburetor Complete 60B 27981010 60B Thermo insulator 27984900 Propeller Nut 45010002 Drive Hub 27708010... - Page 25 61SX-HG/HGL "WC" EXPLODED VIEW MAX- RING C.M3.5X15 C.M3.5X8 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw...
- Page 26 61SX-HG/HGL "WC" ENGINE PARTS LIST MAX- RING Description Code No. Cylinder Head (For 61SX-HG) 27904300 Heatsink Head (For 61SX-HGL) 27904210 Cylinder Liner 27953100 Piston Ring 26703404 Piston 27903200 Piston Pin 26606008 Piston Pin Retainer 27917000 Connecting Rod 27905000 Carburetor Complete 60B 27981010 60B Thermo insulator 27984900...
- Page 27 61RX-H "WC" EXPLODED VIEW MAX- RING C.M3.5X15 C.M3.5X8 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw...
- Page 28 61RX-H "WC" ENGINE PARTS LIST MAX- RING Description Code No. 27904200 Heatsink Head 27953100 Cylinder Liner 26703404 Piston Ring 27923200 Piston 27106007 Piston Pin 27917000 Piston Pin Retainer 27905000 Connecting Rod 27981010 Carburetor Complete 60B 27984900 60B Thermo insulator 45010002 Propeller Nut 27708010 Drive Hub...
- Page 29 61RX-HG/HGL "WC" EXPLODED VIEW MAX- RING C.M3.5X15 C.M3.5X8 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw...
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Page 30: Parts List
61RX-HG/HGL "WC" ENGINE PARTS LIST MAX- RING Description Code No. Heatsink Head (For 61SX-HG) 27904300 Heatsink Head (For 61SX-HGL) 27904210 27953100 Cylinder Liner 26703404 Piston Ring 27923200 Piston 27106007 Piston Pin 27917000 Piston Pin Retainer 27905000 Connecting Rod 27981010 Carburetor Complete 60B 27984900 60B Thermo insulator 23210007... -
Page 31: Carburetor Exploded
60B CARBURETOR EXPLODED VIEW C.M3X8 C.M2.6X8 N.+M3X4 C.M2.6X5 C.M2.6X5 Type of screw C º Cap Screw F º Flat Head Screw N º Round Head Screw S º Set Screw... - Page 32 60B CARBURETOR PARTS LIST Description Code No. Code No. Description 2 7381 410 Throttle Lever Plug Screw 2 7881 120 Throttle Lever Retaining Screw Fuel Inlet -1 2 2826 131 2 2681 953 Mixture Control Screw 2 7981 200 Carburettor Rotor 2 7981 332 2 7981 920 Metering Nozzle Retaining Screw...
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Page 33: Three View Drawing 32
THREE VIEW DRAWING 61SX-H "WC" RING SPECIFICATIONS 4- φ 4.2 9.95 cc ( 0.607 cu.in. ) Displacement 24.0mm ( 0.945 in. ) Bore 22.0mm ( 0.866 in. ) Stroke Practical R.P.M. 2,000 18,000 r.p.m. Power output 2.2 bhp / 16,000 r.p.m. 600g(21.2oz.) SX-H Weight 2- φ... - Page 34 THREE VIEW DRAWING 61RX-H "WC" RING 4- φ 4.2 SPECIFICATIONS 9.95 cc ( 0.607 cu.in. ) Displacement 24.0mm ( 0.945 in. ) Bore 22.0mm ( 0.866 in. ) Stroke Practical R.P.M. 2,000 18,000 r.p.m. Power output 2.2 bhp / 16,000 r.p.m. 597g(21.1oz.) RX-H Weight 2-M3.5...
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Page 35: O.s. Genuine Parts & Accessories
O.S. GENUINE PARTS & ACCESSORIES MIXTURE CONTROL IN-FLIGHT CONTROL NEEDLE VALVE O.S. GLOW PLUGS CARBURETOR 60D (71705000) No.8 (27983000) (71605100) (71608001) CRANKSHAFT CLAMP LOCK WASHER(10set) SUPER FILTER LONG SOCKET WRENCH WITH PLUG GRIP (71530300) (55500002) (72403050) (71521000) ( L ) - Page 36 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 FAX. (06) 6704-2722 URL : http://www.os-engines.co.jp Copyright 2001 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 070100...
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