1. DL manuals
  2. O.S. Engine
  3. Engine
  4. MAX-61LX
  5. Owner's Instruction Manual

O.S. Engine MAX-61LX Owner's Instruction Manual

Manual is about: MAX-61LX; MAX-61LX-Hring Engines

Summary of MAX-61LX

  • 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

    Safety instructions and warnings about your o.S. Engine introduction basic engine parts, installation before starting facts about glow plugs fuel carburettor controls starting running-in, setting up, starting and adjustment subsequent readjustments carburettor cleanliness adjusting chart installatio...

  • 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 (especia...

  • 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 carburettor crankshaft propeller nut crankcase glowplug mounting lugs installing the glowplug install the washer on the glowplug and screw carefully into cylinder- head, making sure that it is not cross-threaded before tightening firmly. Glow plug washer installation...

  • Page 9: Before Starting

    Front view correct side view top surfaces are in the same plane. Re-align the surfaces as necessary incorrect top surfaces are not in the same plane. Top surfaces are not in the same plane. Engine does not rest firmly. Before starting tools, accessories, etc. The following items are necessary for op...

  • 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 wi...

  • Page 11: Facts About Glowplugs

    Fuel can filter 12v battery starter 7 fuel container filter fit a filter to 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 shaft m...

  • 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

    Starting close open be sure to use a muffler pressurized fuel feed. Use the same fuel as you intend to employ for actual operation of your model. 1. 2. 3. Opening and closing of the needle-valve turn the needle clockwise to close the needle-valve, and turn the needle counter-clockwise to open the ne...

  • Page 15

    In case the engine does not stop. Hold the rotor head, and pinch the silicone tube to stop the fuel supply. If it still does not stop, pull off the fuel tubing from the carburetor. It is necessary to readjust the throttle linkage so that the carburetor rotor is fully closed when the throttle stick a...

  • Page 16: Running-In ("breaking-In")

    Fit a conventional exhaust-pressurized fuel system and select the same fuel as you intend to use for flying the model. All internal-combustion engines benefit, to some degree, from extra care when they are run for the first few times known as running-in or breaking-in. This is allows the working par...

  • Page 17

    Lf, at this stage, the engine is slow to pick up and produces an excess of exhaust smoke, the mixture is too rich. Correct this condition by turning the mixture control screw clockwise. Lf the mixture is extremely rich, engine rpm will become unstable : opening the throttle will produce a great deal...

  • Page 18

    Now adjust the needle valve to achieve the best performance when the model is flying at full throttle. Lf, at full throttle, acceleration is poor, theexhaust unduly smoky and the model fails to reach expected straight line speed, the mixture is too rich and the needle valve setting will need to be r...

  • Page 19: Subsequent Readjustments

    Subsequent readjustments once the engine has been run-in and the carburetor controls properly set up, it should be unnecessary to alter the mixture settings, except to make minor adjustments to the needle valve occasionally, to take account of variations in climatic condisitions. The use of a differ...

  • Page 20: Adjusting Chart

    Adjusting chart open the needle valve11/2 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 idli...

  • Page 21

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

  • Page 22: Care and Maintenance

    Care and maintenance o.S. 'super-filters' (large and small)are available, as optional extras, to deal with this problem. One of these filters, fitted to the outlet tube inside your refueling container, will prevent the entry of foreign material into the fuel tank. It is also recommended that a good ...

  • Page 23: Exploded View

    Type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw ✽ exploded view y t r e w q = - 0 9 8 7 6 5 4 3 2 1 8 -1 1 -a c.M3.5x15 c.M3.5x8 u r -a i 22.

  • Page 24: Engine Parts List

    The specifications are subject to alteration for improvement without notice. Engine parts list 7 1608 001 glowplug no.8 2 7913 000 screw set y 2 7907 000 cover plate t 2 7914 000 gasket set r 2 7962 000 crankshaft (for 61lx-h) e 2 7930 000 crankshaft ball bearing (rear) w q 2 7961 000 crankcase = 2 ...

  • Page 25

    60g/60h carburetoer parts list & exploded view the specifications are subject to alteration for improvement without notice. Type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw ✽ 0 - 9 8 7 6 5 4 3 2 1 -1 1 3 -1 3 -2 3 -3 0 -1 0 -2 0 -3 0 -4...

  • Page 26: Three View Drawing

    9.95 cc (0.607 cu.In.) 24.0mm (0.945 in.) 22.0mm (0.866 in.) 2,000 ~ 18,000 r.P.M. 2.0 bhp / 16,000 r.P.M. 541g(19.1oz.) (61lx-h) 645g(22.8oz.) (61lx-hgl) ■ ■ ■ ■ ■ ■ three view drawing displacement bore stroke practical r.P.M. Power output weight specifications dimensions(mm) 25.

  • Page 27

    (71608001) (71521000) (l) no.8 (71605100) a 5 (72403050) (71530300) (55500003) ■ long socket wrench with plug grip ■ super filter ■ o.S. Glow plugs ■ crankshaft clamp 3261 ■ lock washer(10set) m4 o.S. Genuine parts & accessories (71531000) ■ bubbless weight ■ drive hub (27708010) for 61lx-h 26.

  • Page 28

    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 070101 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan url : h...