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O.S. Engine MAX-10LA Owner's Instruction Manual

Other manuals for MAX-10LA: Instruction Manual
Manual is about: Engines MAX-10, 15, 25 La Series

Summary of MAX-10LA

  • 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 installation of the engine installation of silencer before starting advice on selection of fuel, glow plug & propeller starting the engine running-in (breaking-in) trouble shooting when the engine fails to start care and m...

  • 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

    Introduction the max-10la,15la,25la have been developed to meet the requirements of beginners and sport flyers. Of modern design and having a separate needle- valve unit mounted at the rear, where manual adjustment is safely remote from the rotating propeller, they offer the advantages of reliabilit...

  • Page 9: Installation

    Installation how to fasten the mounting screws. Hardwood mounting beams o.S. Radial motor mount (cast aluminum) tighten second nut firmly down onto first nut. Tighten this nut first. Steel washer 3mm steel screw spring washer or lock washer 12mm min. 12mm min. Hardwood such as cherry or maple. Sprin...

  • Page 10: Installation of Silencer

    Needle-valve extension the needle-valve supplied with these engines is designed to incorporate an extension so that, when the engine is enclosed within the fuselage, the needle-valve may be adjusted from the outside. Cut a commercially available rod to the required length, bend one end to an l shape...

  • Page 11: Before Starting

    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. (see "advice on selection of fuel, glowplug and propeller") 2 glowplug o.S. A3 glowplug is...

  • Page 12

    9 fuel can filter fit a filter to the outlet tube of your refuelling container to prevent entry of foreign matter into the fuel tank. (refer to of starting the engine section.) battery leads fuel can filter 12v battery starter 4 10 silicone tubing this is required for the connection between the fuel...

  • Page 13

    Fuel and pressure lines connect suitable lengths of silicone tubing, as illustrated, after installing the engine. Silicone tubing use knife or razor blade. Do not use wire cutters or pliers note: when cutting silicone tubing...... *if you should need to clean out silicone tubes, use methanol or glow...

  • Page 14

    A b 75% 20% 5% 65% 20% 15% methanol castor oil nitromethane 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. Model engine fuel is also highly flammable. Keep it away from naked...

  • Page 15: Starting The Engine

    Inatall a plug suitable for the engine. Use fuel containing a moderate percentage of nitromethane unless more is essential for racing events. 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 ma...

  • Page 16

    Warning: when using a spinner assembly, make sure that the notches in the spinner shell are large enough to clear the propeller blades and so do not cut into and weaken the blade roots. Tighten the spinner nut firmly so that compression is first felt around this position (i.E. With blades horizontal...

  • Page 17

    Close open needle-valve open the needle-valve 4 turns(for 10la), 3 turns (for 15la), 1 turns (for 25la) in the direction of arrow from the closed position. 2 1 fully closed position fully opened position throttle close open fuel inlet fuel tube fuel will flow from tank to carburettor as propeller is...

  • Page 18

    After fuel has been drawn to the carburettor, flip the propeller two more revolutions, with intake choked, to draw fuel into engine. Above procedure is called priming. Note (important) the quantity of fuel drawn into the engine by priming is an important factor in starting the engine successfully. W...

  • Page 19

    10 hold model securely when starting 11 setting the throttle 12 heat glowplug starter assistant should hold the model so that it cannot move forward when the engine starts. Be careful not to be hit by propeller! Glowplug battery. Place as far to the rear as possible. Fully opened position fully clos...

  • Page 20

    Check that the throttle is one-third open from the fully closed position. Bring the starter into contact with the spinner nut or spinner and depress the starter switch for one or two seconds. Repeat if necessary. When the engine fires, withdraw the starter immediately. Attention: never place your fi...

  • Page 21

    16 disconnect battery leads disconnect the battery leads from the engine with care so that the plug clip does not touch the rotating propeller. If the engine stops when battery leads are disconnected, close the needle-valve a little (approx. 30˚) further, and restart the engine. 17 needle-valve adju...

  • Page 22

    18 needle-valve adjustment(summary) practical best(optimum) needle-valve setting exhaust note starts to change. Disconnect battery leads from glowplug at about this point. Clear, high-pitched two-stroke exhaust note maximum rpm setting("lean"). "rich" needle-valve setting when starting the engine. T...

  • Page 23

    Once the optimum needle-valve setting has been established (see "needle-valve adjustment- summary") the procedure for starting is simplified as follows: 1) open the needle-valve one half-turn (180˚) from the optimum setting. 2) open the throttle fully, place your finger over the carburettor intake a...

  • Page 24: Running-In ("breaking-In")

    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 because the working parts of a new engine take a little time to settle down after being subjected to high temperatures and stresses. Howeve...

  • Page 25

    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. Close the throttle. Run at ...

  • Page 26

    Carburettor air-bleed adjustment start engine and adjust needle- valve as previously described. Close the throttle gradually. Find the idling position. Approx. 15˚ hold the model. Hold model level, then slowly raise its nose. If revolutions increase. If engine runs unevenly or stops. Approx. 15˚ imm...

  • Page 27

    1 2 3 symptom factor cause corrective action recharge the electric starter battery. Recharge lead-acid cell or replace dry battery. (note: an unused, or almost unused, dry battery may sometimes be of insufficient capacity if it is "old stock".) replace glowplug. Check that applied voltage is not too...

  • Page 28

    Symptom factor cause corrective action 2 3 1 2 3 3 3 3 2 voltage too high or too low. Re-check and readjust referring to "before starting" paragraph 4. Continue flipping propeller. If engine does not start after more than 10 flips, disconnect battery from glowplug and leave for a few minutes, then r...

  • Page 29: Care and Maintenance

    Care and maintenance to ensure that you obtain long life and peak performance from your engine, observe the following. Avoid running the engine under dusty conditions. If necessary, lay a sheet of plywood or hard-board in front and under the nose of the model when starting the engine. Foreign matter...

  • Page 30

    O.S. Genuine parts & accessories ■ radial motor mount (71909110) for 10la (71909310) for 15la (71908100) for 25la / "-28 (21125108) for 10/15la (22325100) for 25la (23024008) for 25la ■ exhaust adaptors ■ spinner nut ■ long propeller nut set ■ non-bubble weight ■ super filter (l) ■ silencer extensio...

  • Page 31: 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 (max -10la) 1 2 3 3 -1 4 5 6 7 8 9 0 - - -1 - -2 = q m.+m2.6x7 s.3x3 m.+m2.6x10 30 ✽.

  • Page 32: Engine  Parts  List

    Engine parts list specifications are subject to alteration for improvement without notice. (max -10la) cylinder head cylinder piston & connecting rod assembly carburettor complete 10h carburettor retaining screw propeller nut propeller washer drive hub thrust washer crankcase crankshaft cover plate ...

  • Page 33: Exploded View

    Type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw w q = - 0 5 4 3 1 2 5 -1 5 -2 = -3 = -5 = -4 = -2 = -1 n.+m3x12(25la) n.+m3.5x5 b.+m2.6x8 s.3x3 m.+m2.6x10(15la) 9 8 7 6 exploded view (max -15la,25la) 32 ✽.

  • Page 34: Engine  Parts  List

    Engine parts list specifications are subject to alteration for improvement without notice. (max -15la,25la) 15la 25la 21754000 21753000 21706000 21205040 21783000 21015001 20810007 21109005 21758000 21620006 21751000 21752000 21757000 21757100 21781970 21714100 21713000 21225000 22681957 22325300 21...

  • Page 35

    2 3 4 5 7 6 1 1 - 1 n.+m3x6 n.+m2x14(10g) n.+m2.6x15 n.+m3.5x5 n.+m2x6(10g) m.+m2.6x7 4 carburettor exploded view & parts list 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...

  • Page 36: Max-10La Three View Drawing

    Max-10la three view drawing displacement bore stroke practical r.P.M. Power output weight 1.76 cc (0.107 cu.In.) 13.44mm (0.529 in.) 12.4mm (0.488 in.) 2,500 ~ 18,000 r.P.M. 0.27 bhp / 17,000 r.P.M. 112g (3.95 oz.) ■ ■ ■ ■ ■ ■ 10la specifications dimensions(mm) 23 38.6 11.7 44.3 27.5 2-ø2.8 23.5 20 ...

  • Page 37

    Max-15la/25la three view drawing displacement bore stroke practical r.P.M. Power output weight 4.07 cc (0.249 cu.In.) 18.0mm (0.709 in.) 16.0mm (0.630 in.) 2,500 ~ 16,000 r.P.M. 0.6 bhp / 15,000 r.P.M. 197g (6.94 oz.) ■ ■ ■ ■ ■ ■ 25la specifications displacement bore stroke practical r.P.M. Power ou...

  • Page 38

    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.