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O.S. Engine MAX-32SX-H Series Owner's Instruction Manual

Summary of MAX-32SX-H 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 famil...

  • Page 2: Contents

    Contents safety instructions and warnings about your o.S. Engine introduction basic engine parts, installation notes concerning the recoil starter before starting facts about glow plugs fuel carburetor controls starting running-in,adjustment subsequent readjustments carburetor cleanliness adjusting ...

  • 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 • • • • • never touch, or allow any object to come into contact with, the rotating parts. Model engine fuel is poison- ous. 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. Model engine fuel is also ...

  • Page 5: Notes

    Notes • • • • • these engine were designed for model helicopters. Do not attempt to use it for any other purpose. Mount the engine in your model securely, fol- lowing the manufacturers' recommendations, using appropriate screws and locknuts. Install an effective silencer (muffler). Frequent close ex...

  • Page 6: Notes

    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. For their safety, keep all onlookers (e...

  • Page 7: Introduction

    Because of this initial tightness, a standard electric starter may have difficulty in rotating the engine when cold, before it has been adequately run-in. In this case, use a high- torque type starter. Do not,however, confuse tightness with the symptoms of hydraulic lock caused by an excess of fuel ...

  • Page 8: Basic Engine Parts

    Basic engine parts heatsink head carburetor typr 20c crankshaft propeller nut crankcase needle valve glowplug beam mount recoil starter assembly no.O max-32sx-hx starter handle installing the glowplug install washer on glowplug and insert carefully into cylinder-head, making sure that it is not cros...

  • Page 9: Before Starting

    As the recoil starter is of unit construction, re- placement parts are not available. Replace- ment recoil starters are obtainable only as complete units. Do not pull the starter cord more than 50cm (20 in.). Do not abruptly release the starter knob. Allow the cord to rewind slowly by holding on to ...

  • Page 10

    3 glowplug battery the power source for heating the glowplug may be either a large heavy-duty 1.5volt dry cell, or preferably, a 2-volt rechargeable lead-acid cell. 1.5 volt heavy-duty dry battery or 2 volt rechargeable lead-acid cell (at least 5ah) if a 2-volt cell is employed, use a resistance wir...

  • Page 11: Facts About Glowplugs

    Fuel can filter 12v battery starter 7 fuel container filter install a filter on the outlet tube of your refuelling container to prevent entry of foreign matter into the fuel tank 8 silicone tubing this is required for the connection between the fuel tank and engine. 9 hexagon starting shaft this sha...

  • Page 12: Fuel

    Install a plug suitable for the engine. Use fuel containing a moderate percentage of nitromethane. Do not run the engine too lean and do not leave the battery connected while adjusting the needle. However, plug life can be extended and engine performance maintained by careful use, i.E.: apart from w...

  • Page 13: Carburetor Controls

    Carburetor controls with a fixed-wing model, power failure is rarely a serious threat to the safety of the aircraft since it can usually glide down to a safe landing. In a helicopter, on the other hand, it is vitally imporant that the engine keeps running and that there is a quick and reliable respo...

  • Page 14: Starting (32Sx-H / Sx-H

    Starting (32sx-h / sx-h ring ) open the throttle fully, and turn the engine using an electric starter until the fuel is seen to reach the carburetor. Fuel may be drawn to the carburetor more quickly by choking the exhaust outlet with a finger, while operating the starter. Do not continue to choke th...

  • Page 15: Running-In ("breaking-In")

    Connect the battery to the glowplug and pull the start knob smartly. 6. Note: if the throttle response is poor or the engine stops due to a temporarily over-rich mixture im- mediately after the engine is started, pinch the fuel line for one or two seconds until the engine r.P.M. Increase and the eng...

  • Page 16

    This enables the full r.P.M. Range, from idling to full power, to be controlled by the throttle stick, and then allows the engine to be stopped, from the transmitter, by closing the throttle completely with the trim lever. Set up the throttle linkage as follows: with the transmitter throttle trim le...

  • Page 17

    Hover the model and actuate the throttle to observe response over the medium speed range. Lf the engine smokes excessiveiy and throttle response is poor, the mixture is too rich ; in which case, land the model and turn the needle valve clockwise. Do not close the needie valve too much, keeping it a ...

  • Page 18: Subsequent Readjustments

    O readjustments should therefore be carried out as follows: lf the mid-range throttle response is not rapid and positive (indicating a rich mid-range mixture), turn the needle valve 2 or 3 clicks clockwise, or turn the mixture control screw 10-20 degrees ciockwise. Lf, on the other hand, the respons...

  • Page 19: Carburetor Cleanliness

    Carburetor cleanliness the correct functioning of the carburetor depends on its small fuel orifices remaining clear. The minute particles of foreign matter that are present in any fuel can easily partially obstruct these orifices and upset mixture strength so that engine performance becomes erratic ...

  • Page 20: Adjusting Chart

    Adjusting chart open the needle valve 1-1/2 turns from the fully closed position. Make sure that the mixture control valve is at the factory setting. A start the engine warm up the engine b c observe the mixture condition while "floating" the model turn the mixture control screw counter-clockwise id...

  • Page 21

    Installation of throttle servo after the engine in the helicopter, please observe the following recommendations when linking the throttle servo to the carburettor. Locate the servo so that its output arm and the throttle pushrod are, as closely as possible, directry in line with carburetor's throttl...

  • Page 22: Care and Maintenance

    Care and maintenance the minute particles of foreign matter, that are present in any fuel may, by accumulating and partially obstructing fuel flow, cause engine performance to become erratic and unreliable. O.S. 'super-filters' (large and small)are available, as optional extras, to deal with this pr...

  • Page 23: Exploded View (

    T r e w q = - 0 9 8 7 6 5 4 3 2 1 5 -2 5 -1 n.+m3.5x5 c.M2.6x7 c.M2.6x12 type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw exploded view ( max- 32sx-h / 32sx-h ring ) 22 ✽.

  • Page 24: Engine Parts List (

    No. 1 2 3 4 5 5 -1 5 -2 6 7 8 9 0 - = q w e r t 23404000 23403000 23406000 23405000 23481000 22615000 23081706 23210007 22620003 22831000 23401000 23430000 23402000 23414000 22907000 22413009 23403100 22903400 23403200 71605300 code no. Piston ring(for 32sx-hring) piston(for 32sx-hring) cylinder lin...

  • Page 25: Exploded View (

    Y t r e w q = - 0 9 8 7 6 5 4 3 2 1 7 -2 7 -1 y -2 y -1 u c.M2.6x12 n.+m3.5x5 f.M2.6x10 n.+m3x8 exploded view ( max- 32sx-hx ring ) type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw 24 ✽.

  • Page 26: Engine Parts List (

    Engine parts list ( max- 32sx-hx ring ) the specifications are subject to alteration for improvement without notice. No. 1 2 3 4 5 6 7 7 -1 7 -2 8 9 0 - = q w e r t y y -1 y -2 u 23404000 23403100 22903400 23403200 23406000 23405000 23481000 22615000 23081706 23210007 22620003 22831000 23401000 2343...

  • Page 27

    Carburettoer parts list & exploded view no. 1 1 -1 1 -2 2 3 4 5 5 -1 6 7 8 9 9 -1 9 -2 9 -3 9 -4 9 -5 0 - 23481400 22781410 22781420 22781411 23481200 23481650 23481100 24881824 26781506 45581820 22681953 27681900 27681970 24981837 26381501 27381940 26711305 22615000 23081706 carburetor retaining sc...

  • Page 28: Max-32Sx-H/32Sx-H

    Max-32sx-h/32sx-h ring three view drawing displacement bore stroke practical r.P.M. Power output weight 5.23 cc (0.319 cu.In.) 19.5mm (0.768 in.) 17.5mm (0.689 in.) 2,000 ~ 22,000 r.P.M. 1.2 bhp / 18,000 r.P.M. 290g(10.23oz.) sx-h 285g(10.06oz.) sx-h ring ■ ■ ■ ■ ■ ■ specifications dimensions(mm) 27.

  • Page 29: Max-32Sx-Hx

    Max-32sx-hx ring three view drawing displacement bore stroke practical r.P.M. Power output weight 5.23 cc (0.319 cu.In.) 19.5mm (0.768 in.) 17.5mm (0.689 in.) 2,000 ~ 21,000 r.P.M. 1.15 bhp / 17,000 r.P.M. 387g(13.66oz.) ■ ■ ■ ■ ■ ■ specifications dimensions(mm) 28.

  • Page 30

    O.S. Genuine parts & accessories ■ drive hub (23408000) (23325020) ■ e-3030 silencer (23325100) (22625508) ■ crankshaft clamp 3261 (for 32f-h, sx-h, 61sx-h,rx-h ) (71530300) 3246 (for 32sx-h, 46fx-h ) (71530400) (72200160) ■ booster terminal kit for 'shuttle' ■ super filter ■ o.S. Glow plugs ■ 843 s...

  • Page 31: Memo

    Memo 30

  • Page 32

    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 100102 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan url : h...