O.S. engine MAX-50SX Ring Owner's Instruction Manual
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O.S. engine MAX-50SX Ring Owner's Instruction Manual

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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 2-6 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.
FUEL, PROPELLERS
CONTENTS
2-6
IDLING ADJUSTMENT CHART
7
8
8-10
10-11
11-12
12
ENGINE EXPLODED VIEWS &
ENGINE PARTS LISTS
13
CARBURETOR EXPLODED VIEWS
14-15
& PARTS LISTS
15
16-17
ENGINE THREE VIEW DRAWINGS
1
17-18
19-21
22
23
24
25
26-33
34-36
37-38
39-42

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Summary of Contents for O.S. engine MAX-50SX Ring

  • Page 1: Table Of Contents

    CONTENTS STARTING 17-18 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE RUNNING-IN (Breaking-in) 19-21 FEATURES OF FX SERIES ENGINES, BEFORE IDLING ADJUSTMENT CHART INSTALLING THE ENGINE...

  • Page 2: 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 3 NOTES This engine was designed for model If you remove the glowplug from the engine aircraft. Do not attempt to use it for any and check its condition by connecting the other purpose. battery leads to it, do not hold the plug with bare fingers.Use an appropriate tool or a Mount the engine in your model securely, folded piece of cloth.

  • Page 4: Features Of Fx Series Engines, Before

    NOTES Adjust the throttle linkage so that the engine For their safety, keep all onlookers stops when the throttle stick and trim lever (especially small children) well back (at on the transmitter are fully retarded. least 20 feet or 6 meters) when preparing Alternatively, the engine may be stopped by your model for flight.

  • Page 5: Basic Engine Parts

    NEEDLE-VALVE LOCATION BASIC ENGINE PARTS As delivered from the factory, the MAX-61FX has its Glowplug Cylinder head needle-valve assembly installed horizontally. However, if more convenient for a particular installation, the needle-valve may be reinstalled vertically behind the cylinder. (See sketch opposite.) Fuel inlet Throttle Stop Screw Please note that the needle-valve knob has a center...

  • Page 6: Installation Of The Engine

    Rotate the needle-valve unit through 90˚ and re- INSTALLATION OF THE ENGINE attach it to the bracket in the required position (see Installation in the model sketch below). O.S. radial motor mount A typical method of beam Note: mounting is shown below, left. (Available as an optional extra As self-tapping screws are used for unit part.

  • Page 7: Fuel Tank Location

    E-4010 Silencer FUEL TANK LOCATION Assembly screw Cone baffle Suggested fuel tank capacities are listed opposite. Turn to requlred position These will allow 12-13 minute flights. Locate the fuel tank so that the top of the tank is 5- Exhaust outlet 10mm (1/4-3/8") above the level of the needle-valve.

  • Page 8: Mixture Controls

    Reminder! FUEL Model engine fuel is poisonous. Do not allow it to come into contact with Select, by practical tests, the most suitable fuel from the eyes or mouth. Always store it in a among the best quality fuels available in your country clearly marked container and out of for model use.

  • Page 9: Before Starting

    BEFORE STARTING Warning (Very hot) Tools, accessories, etc. Never touch the nichrome wire while the battery is The following items are necessary for operating the connected. engine. Resistance coil (nichrome wire) 1 Fuel Model glowplug engine fuel of good quality, preferably containing a small percentage of nitromethane.

  • Page 10: Running-In (Breaking-In)

    Fill the fuel tank. Do not allow fuel to overflow into 6. Connect battery leads to glowplug. the silencer, otherwise the engine may become Bring electric starter into contact with spinner-nut flooded and difficult to start. or spinner and depress starter switch for one or Check that the needle-valve is closed.
  • Page 11 Optimum needle setting(1) Slowly advance the throttle to its fully open position, then gradually close the needle-valve until the exhaust note begins to change. (4-cycle to 2-cycle) At this point, disconnect the battery from the glowplug, taking care that the battery leads or glowplug clip do not come into contact with the rotating propeller.

  • Page 12: Realignment Of Mixture Control Valve

    Note: Mixture Control Valve adjustments should MIXTURE CONTROL VALVE ADJUSTMENT be made in steps of 15-30˚ initially, carefully checking the effect, on throttle With the engine running, close the throttle and allow it response, of each small adjustment. to idle for about five seconds, then open the throttle fully.

  • Page 13: Subsequent Starting Procedure

    SUBSEQUENT STARTING PROCEDURE SUBSEQUENT READJUSTMENT Once the optimum needle-valve setting has been es- Once the engine has been run-in and the controls tablished (see page 19, Needle-valve adjustment dia- properly set up, it should be unnecessary to alter the gram) the procedure for starting may be simplified as mixture settings;...
  • Page 18 CARBURETOR 40B (50SX,40,46FX) Code No. Description 22781401 Throttle Lever Assembly 22781411 Throttle Lever 22781420 Throttle Lever Fixing Screw 27783600 Mixture Control Valve 22781800 "O"Ring 25681200 Carburetor Rotor 26781506 Rotor Spring 25681100 Carburetor Body 25681620 Throttle Stop Screw 22681953 Fuel Inlet (No.1) N.+M3.5x6 46215000 Carburetor Gasket...

  • Page 19: Genuine O.s. Parts & Accessories

    CARBURETOR 60F (91FX RING N.+M3x6 Description Code No. 27881400 Throttle Lever Assembly 29581200 Carburetor Rotor 45582300 Mixture Control Valve Assembly 46066319 "O" Ring (L) 24881824 "O" Ring (S) 29581100 Carburetor Body 45581820 Rotor Guide Screw N.+M3.5x6 22681953 Fuel Inlet (No.1) 29015019 Carburetor Gasket 25081700...
  • Page 20 O.S. SILICONE EXHAUST T-4010 TUNED SILENCER NON-BUBBLE WEIGHT TUBE ASSEMBLY HEADER PIPE (71531000) (72101120) (72101230) SUPER FI LTER (72403050) Code No. Type of Engine For 61FX, 91FX For 61FX 72105337 40.46FX 72101338 61FX.91FX LOCK WASHER BLIND NUTS CAP SCREW SETS LONG SOCKET WRENCH (10pcs.

  • Page 21: Three View Drawing

    THREE VIEW DRAWING 17.5 40FX MAX - SPECIFICATIONS 6.47 cc ( 0.395 cu.in. ) Displacement 20.5mm ( 0.807 in. ) Bore 19.6mm ( 0.772 in. ) Stroke Practical R.P.M. 2,000-17,000 r.p.m. Power output 1.36 ps / 16,000 r.p.m. 386g ( 13.6 oz. ) Weight 46FX MAX -...

  • Page 22: Specifications

    91FX MAX - RING SPECIFICATIONS 14.95 cc ( 0.912 cu.in. ) Displacement 27.7mm ( 1.091 in. ) Bore 24.8mm ( 0.976 in. ) Stroke Practical R.P.M. 2,000-16,000 r.p.m. Power output 2.8 ps / 15,000 r.p.m. 550g ( 19.42 oz. ) Weight 4- 4.2 24.7...

This manual is also suitable for:

Max-91fx ringMax-61fxMax-40fxMax-46fx

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