O.S. Engine MAX-46AX Owner's Instruction Manual

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Summary of MAX-46AX

  • Page 1

    It is of vital importance, before attempting to operate your engine, to read the general 'safety instructions and warnings' section on pages 2-6 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 familia...

  • Page 2: Warnings

    2 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 fu...

  • Page 3: Notes

    4 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' recommenda- tions, using appropriate screws and lock- nuts. Be sure to use the silencer (muffler) supplied with the engine. Frequ...

  • Page 4: Notes

    6 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 slee...

  • Page 5

    8 needle-valve location basic engine parts cylinder head carburetor silicone tube crankshaft propeller nut propeller washer drive hub crankcase needle valve cover plate fuel outlet fuel inlet glowplug fuel inlet beam mount throttle lever the procedure for relocating the needle-valve is as follows: f...

  • Page 6

    10 hardwood mounting beams o.S. Radial motor mount (cast aluminum) how to fasten the mounting screws. Tighten second nut firmly down onto first nut. Tighten this nut first. Steel washer 3mm steel screw spring washer or lock washer hardwood such as cherry or maple. Spring washer 3.5mm steel allen scr...

  • Page 7

    12 suggested fuel tank capacity is approx 300cc. These will allow 12-13 minute flights. Locate the fuel tank so that the top of the 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 ...

  • Page 8

    14 fuel propellers suggested propeller sizes are listed on page 15. The suitability of the prop depends on the size and weight of the model and type of flying. Determine the best size and type after the engine has been run in. Check the balance of the propeller before fitting it to the engine. Unbal...

  • Page 9

    16 before starting tools, accessories, etc. The following items are necessary for operating the engine. 1 fuel model glowplug engine fuel of good quality, preferably containing a small percentage of nitromethane. 2 glowplug fit a glowplug to the engine. O.S. A3 plug is supplied with the engine. 3 pr...

  • Page 10

    18 6. Connect battery leads to glowplug. Bring electric starter into contact with spinner-nut or spinner and depress starter switch for one or two seconds. Repeat if necessary. When the engine starts, withdraw the starter im- mediately. 7. Attention : do not choke the carburettor air intake when app...

  • Page 11

    20 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 th...

  • Page 12

    22 idling adjustment chart start the engine. Make sure that the throttle is fully open. Adjust the neede-valve. Close the throttle gradually. Find the idling position. Fix the idling position. Open the throttle fully. Does the engine regain full power? Continue running at high speed for 10 seconds. ...

  • Page 13

    24 subsequent starting procedure subsequent readjustment once the optimum needle-valve setting has been es- tablished (see page 21, needle-valve adjustment dia- gram) the procedure for starting may be simplified as follows. Open the needle-valve one half-turn (180 ° ) from the optimum setting. Set t...

  • Page 14

    26 engine exploded view s.M3x3 18-1 18-2 18-3 18-4 18-5 18-6 t.+3x10 c.M3x15 c.M3x8 1 2 3 4 5 6 7 8 9 11 12 13 14 10 15 16 17 19 18 type of screw c...Cap screw m...Oval fillister-head screw t...Tapping screw f...Flat head screw n...Round head screw s...Set screw 27 enginen parts list the specificati...

  • Page 15

    28 carburetor exploded view & parts list type of screw c...Cap screw m...Oval fillister-head screw f...Flat head screw n...Round head screw s...Set screw throttle lever assembly throttle lever throttle lever fixing screw mixture control valve "o"ring carburetor rotor carburetor body rotor guide scre...

  • Page 16

    30 super fi lter non-bubble weight lock washer (10sets) long socket wrench with plug grip blind nuts (10pcs. /sets) the specifications are subject to alteration for improvement without notice. (72403050) (71531000) (71521000) (79870040) m4 (25425600) m4 (55500003) silencer extension adaptors 31 7.45...

  • Page 17

    32 memo c copyright 2003 by o.S.Engines mfg. Co., ltd. All rights reserved. Printed in japan. 090300 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan u n eq ua ll ed qua lity precision & per for m an ce es ta blis hing the standards of e xce ll e...