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O.S. Engine MAX-15CV-A Owner's Instruction Manual

Manual is about: Engines MAX-15CV-A; 25FX; 32SX

Summary of MAX-15CV-A

  • 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 famil...

  • Page 2: Contents

    Contents safety instructions and warnings about your o.S. Engine introduction, before installing the engine basic engine parts carburetor parts installation of the engine throttle linkage, silencer fuel tank location glowplug fuel, propellers mixture controls before starting starting running-in (bre...

  • Page 3: Warnings

    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 futu...

  • Page 4: Warnings

    Warnings 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. Never operate your engine in an en- closed space. Model engines, like auto- mobile engines, exhaust deadly carbon- mon...

  • Page 5: Notes

    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 engin...

  • Page 6: Notes

    Notes • • always check the tightness of the propeller nut and retighten it, if necessary, before restarting the engine, particularly in the case of four-stroke-cycle engines. If a safety locknut assembly is provided with your engine, always use it. This will prevent the propeller from flying off in ...

  • Page 7: Notes

    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, sh...

  • Page 8: Introduction

    This range of engines is ideally suited to a variety of r/c aircraft, including trainer, sports, aerobatic 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. Introduction with these engines, the...

  • Page 9: Basic Engine Parts

    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 max-15cv-a throttle lever throttle stop screw installation of the carburettor loosen the retainer scr...

  • Page 10: Installation of The Engine

    Retaining screw size 15cv-a 25fx 32sx 3.0mm 3.0mm 3.0mm installation of the engine rigid hardwood (e.G. Maple) at least 12mm(1/2") at least 12mm(1/2") o.S. Radial motor mount (available as an optional extra part. See parts list) hardwood mounting beams o.S. Radial motor mount (cast aluminum) how to ...

  • Page 11: Throttle Linkage

    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 ro- tor is (a) fully open when the ...

  • Page 12: Fuel Tank Location

    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. Remind...

  • Page 13: Glowplug

    The role of the glowplug with a glowplug 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....

  • Page 14: Fuel

    Fuel propellers suggested propeller sizes are listed on page 14. 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. Unbalanc...

  • Page 15: Mixture Controls

    Mixture controls 15cv-a 25fx 32sx 8 ✕ 4 ~ 6,8 ✕ 4 ~ 6,9 ✕ 4 9 ✕ 5 ~ 6,9.5 ✕ 5,10 ✕ 5 10 ✕ 6,10.5 ✕ 5,11 ✕ 6 sport 8 ✕ 4 ~ 6 9 ✕ 6,9.5 ✕ 5 9 ✕ 7 ~ 8,10 ✕ 6 aerobatic 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...

  • Page 16

    Battery leads 12v battery starter 5 battery leads these are used to conduct current from the battery to the glowplug. Basically, two leads, with clips, are required, but, for greater conve- nience, twin leads with special glowplug connectors, as shown on the right, are commercially available. 6 fuel...

  • Page 17: Starting

    Starting fill the fuel tank. Do not allow fuel to overflow into the silencer, otherwise the engine may become flooded and difficult to start. Check that the needle-valve is closed. (do not overtighten.) now open the needle-valve counter- clockwise to the starting setting:- 2 ~ 3 turns for 15cv-a 1 ~...

  • Page 18: Running-In ("breaking-In")

    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 applyi...

  • Page 19

    Now close the needle-valve until the engine speeds up to "two-cycle"operation and allow it to run for about 10 seconds, then reopen the needle- valve to bring the engine back to "four- cycle"operation and run it for another 10 seconds. Repeat this procedure until the fuel tank is empty. Re-start and...

  • Page 20

    20 ~ 45˚ needle-valve adjustment diagram this diagram is for reference purposes only. Actual needle positions may differ from those shown. To stop the engine, close the throttle completely to cut off fuel/air supply. Note : • practical best(optimum) needle-valve setting exhaust note starts to change...

  • Page 21: Idling Adjustment Chart

    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. Clo...

  • Page 22

    Mixture control valve adjustment realignment of mixture control valve with the engine running, close the throttle and allow it to idle for about five seconds, then open the throttle fully. If, at this point, the engine is slow to pick up and produces an excess of exhaust smoke, the mixture is too ri...

  • Page 23: Subsequent Readjustment

    Subsequent starting procedure subsequent readjustment once the optimum needle-valve setting has been es- tablished (see page 19, 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 the ...

  • Page 24: Carburetor Cleanliness

    Carburetor cleanliness engine care and maintenance at the end of each operating session, drain out any fuel that may remain in the fuel tank. Next, energize the glowplug and try to restart the engine to burn off any fuel that may remain inside the engine. Repeat this procedure until the engine fails...

  • Page 25

    ■ no.8 (71608001) a5 (71605100) ■ for 25fx.32sx ■ ■ ■ ■ 73101000 1/4"-28 25fx. 32sx 21125502 22625508 15cv-a(871) 25fx(892) 32sx(e-3030) 21125108 22625103 23325100 15cv-a(871) 25fx(892) 32sx(e-3030) a3 (71605300) o.S. Glow plugs o.S. Genuine parts & accessories spinner nut 20824005 23024008 23024009...

  • Page 26

    ■ (72403050) ■ (71531000) (71521000) ■ ■ 55500002 25fx.32sx m3 ■ 23325030 e-3030s 32sx code no. Size type of engine super silencers size code no. Type of engine super fi lter non-bubble weight lock washer (10sets) long socket wrench with plug grip 25.

  • Page 27: Exploded View (15Cv-A)

    Exploded view (15cv-a) type of screw c … cap screw f … flat head screw n … round head screw s … set screw 1 2 3 4 5 6 7 8 9 0 - = q w e r c . M 2 . 6 x 1 2 m . M 2 . 6 x 8 e -1 e -2 e -3 e -4 e -5 s . 3 x 3 ✽ 26.

  • Page 28: Enginen Parts List (15Cv-A)

    Specifications are subject to alteration for improvement without notice. Enginen parts list (15cv-a) no. 1 2 3 4 5 6 7 8 9 0 - = q w e e -1 e -2 e -3 e -4 e -5 r description retaining screw ( 2pcs.) assembly screw exhaust pressure nipple 871 silencer screw set set screw "o" ring for needle ( 2pcs.) ...

  • Page 29: Exploded View (25Fx,32Sx)

    Exploded view (25fx,32sx) ✽ type of screw c … cap screw f … flat head screw n … round head screw s … set screw r e -7 e -6 e -5 e -4 e -3 e -2 e -1 e w q = - 0 9 8 7 6 5 -2 5 -1 5 4 3 2 1 c.M2.6x12 s.M3x3 c.M2.6x7 n.+m3.5x5 28.

  • Page 30

    Code no. No. 25fx 32sx 1 2 3 4 5 5 -1 5 -2 6 7 8 9 0 - = q w e e -1 e -2 e -3 e -4 e -5 e -6 e -7 r 22604020 22603040 22606009 22805010 22681030 22615000 23081706 23210007 23009006 22808000 22620003 22831000 22601050 22630002 22602030 22614010 22607010 22607011 22681953 22681980 24981837 26381501 27...

  • Page 31

    9 8 7 6 5 4 3 2 1 -1 1 n.+m3.5x5 1 2 3 5 4 6 7 8 1 2 3 4 5 6 7 8 2 2681 430 2 1284 200 2 1284 600 2 2481 506 2 1581 100 2 2681 320 2 2681 953 2 2615 000 1 1 -1 2 3 4 5 6 7 8 9 throttle lever assembly throttle lever carburettor rotor mixture control screw (w/o-ring) rotor spring carburettor body thro...

  • Page 32: 15Cv-A

    9 8 7 6 5 4 3 2 1 1 -2 1 -1 5 -1 n.+m3.5x5 carburetor 20f (32sx) 1 1 -1 1 -2 2 3 4 5 5 -1 6 7 8 9 throttle lever assembly throttle lever fixing screw throttle lever throttle rotor mixture control valve spring rotor spring carburettor body "o"ring (2pcs.) rotor guide screw fuel inlet (w / washer) car...

  • Page 33: 25Fx

    Max - 25fx max - 32sx 4-ø3.3 15 38 35 16 19 1/4-28unf 24 53 22.6 24.8 22.3 30.5 30 46 15.5 60 30.6 45 unf1/4-28 22 53 22.7 24.8 22 30.5 15.3 57.2 35 16 19 38 15 4-ø3.3 three view drawing displacement bore stroke practical r.P.M. Power output weight 4.07 cc (0.2485 cu.In.) 18.0mm (0.7087 in.) 16.0mm ...

  • Page 34

    C copyright 2000 by o.S.Engines mfg. Co., ltd. All rights reserved. Printed in japan. Un eq ua lle d qu ality precision & perfo rma nc e est ablish ing the standards of ex cel len ce 110101 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan url : h...