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  5. Owner's Instruction Manual

O.S. Engine MAX-12TR Owner's Instruction Manual

Manual is about: MAX-12TR Engine

Summary of MAX-12TR

  • 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 familia...

  • Page 2

    Contents safety instructions and warnings about your o.S. Engine introduction, basic engine parts installation air cleaner type 103 glowplug tools, accessories, etc. Carburettor controls pressurized fuel system starting the engine & running-in('breaking-in) final adjustment carburettor cleanliness c...

  • 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 poi- sonous. 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 open flame, excessive heat, sources of sparks, or anyt...

  • Page 5: Notes

    This engine is intended for model cars. Do not attempt to use it for any other purpose. Mount the engine in your model securely, following the manufacturers' recommendations, using appropriate screws and locknuts. Fit an effective silencer (muffler). Frequent close exposure to a noisy exhaust (espec...

  • Page 6: Notes

    Notes to stop the engine, fully retard the throttle stick and trim lever on the trans-mitter, or, in an emergency, cut off the fuel supply by pinching the fuel delivery line from the tank. • warning! Immediately after a glowplug- ignition engine has been run and is still warm, conditions sometimes e...

  • Page 7: Basic Engine Parts

    Installing the glowplug carburettor install washer on glowplug and insert carefully into cylinder-head, making sure that it is not cross-threaded before tightening firmly. Basic engine parts the max-12tr is high-perfomance engines for 1/10 class r/c racing cars. There are two verions, the one with 1...

  • Page 8: Engine Installation

    Engine installation make sure that the vehicle's engine mounting surfaces are level and in the same plane. Poor installation may cause distortion of the crankcase, bearings, etc., resulting in erratic running and loss of performance. The recommended screws for securing the engine are 3mm or 4-40 ste...

  • Page 9: Air Cleaner Type 103

    Air cleaner type 103 installation of air cleaner carefully clean the carburettor, removing any old adhesive or sealant that may have been previously used on the outside of the air intake. • press the air cleaner body firmly over the carburettor air intake. Make sure that the outer rim of the air int...

  • Page 10: Glowplug

    Glowplug since the compatibility of glowplug and fuel may have a marked effect on performance and reliability, it may be worthwhile to choose the r/c type plug found most suitable after tests.Recommended o.S. Plugs are a5, no.8 and r5. Carefully fit plug finger-tight, before final tightening with th...

  • Page 11: Tools, Accessories, Etc.

    Tools, accessories, etc. The following items are necessary for operating the engine. Fuel use only top quality methanol-based model engine fuel.For consistent performance and long engine life, it is advisable to use fuel containing at least 18% lubricant. This engine is designed to run on both low a...

  • Page 12: Carburettor Controls (10J)

    Long socket wrench recommended for easy removal and replacement of the angled and recessed glowplug, the o.S.Long socket wrench incorporates a special grip. Silicone fuel line heatproof silicone tubing of approx. 5mm o.D. And 2mm i.D. Is required for the connection between the fuel tank and engine. ...

  • Page 13: Carburettor Controls (10M)

    Carburettor controls (10m) the needle-valve: the mixture control screw: the throttle stop screw: three adjustable controls are provided on this carburettor. For adjusting the mixture strength when the throttle is fully open. For adjusting the mixture strength at part- throttle and idling speeds, to ...

  • Page 14

    Approx 1mm approx 0.3-0.5mm the following procedure is suitable for these engines when the o.S. T-1030 tuned silencer and a fuel containing up to 30% nitromethane are used. Use the same fuel as is to be employed for all initial running and containing not less than 18% lubricant. Temporarily remove t...

  • Page 15: •

    30˚ when the engine starts, first allow it to operate in short runs on its very rich starting settings, with the glowplug battery still connected and with its driving wheels clear of the ground. The rich mixture will, under these conditions, provide adequate lubrication and cooling, indicated by pro...

  • Page 16: •

    If the engine fails to start check the following: glowplug battery discharged or glowplug defunct. Fuel not reaching carburettor. Engine flooded. Do not over-prime. (this could also cause hydraulic lock and damage the engine on application of the electric starter.) remove glowplug, close needle-valv...

  • Page 17: •

    In this case, turn the mixture control valve clockwise 45˚. If, on the other hand, the engine tends to speed up momentarily and then cut out abruptly when the throttle is opened,the idling mixture is too lean. Correct this by turning the mixture control valve counter-clockwise 45˚. Warning! Carry ou...

  • Page 18: Carburettor Cleanliness

    Ball link and slide valve extension it is seldom necessary to separate the slide-valve extension from the slide-valve itself. For cleaning, withdraw this complete sub-assembly from the carburettor body after removing the slide-valve guide screw. Then wash with methanol or glow-fuel. (note: take care...

  • Page 19: Care and Maintenance

    4. Care and maintenance 1. 2. 3. 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...

  • Page 20: Racing Engine Parts

    Racing engine parts (71608001) (71605200) (72106160) (72103020) (72103310) (71530200) (71521000) o.S. Genuine parts & accessories o.S. Glow plug 12tr exhaust header pipes for super10 class no.8 r5 super joint tube 15 t-1020 tuned silencer crankshaft clamp 1521 long socket wrench with plug grip φ 3 (...

  • Page 21: 12Tr Exploded View

    12tr exploded view type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw c . M 2 . 6 x 7 1 -1 1 -2 1 20 2 3 5 6 4 7 8 9 0 - = q w r t e ✽.

  • Page 22: 12Tr Engine Parts List

    12tr engine parts list the specifications are subject to alteration for improvement without notice. 103 cleaner body 103 filter elements (4pcs.) super air cleaner 103(w/2 filter elements) screw set glow plug a5 gasket set crankshaft crankshaft ball bearing (rear) crankcase crankshaft ball bearing (f...

  • Page 23: 12Tr(P) Exploded View

    Type of screw c … cap screw m … oval fillister-head screw f … flat head screw n … round head screw s … set screw 12tr(p) exploded view c . M 2 . 6 x 1 2 c . M 2 . 6 x 7 1 -1 1 -2 1 22 2 3 4 5 6 7 8 9 0 - = q w ✽.

  • Page 24: 12Tr(P) Engine Parts List

    12tr(p) engine parts list the specifications are subject to alteration for improvement without notice. Description code no. 7 2403 320 7 2403 310 2 1457 000 2 1464 000 2 1452 010 2 1430 000 7 2403 300 7 1605 100 2 1213 000 2 1451 000 2 2631 020 2 5381 701 2 1483 000 2 1455 000 2 3817 000 2 1256 000 ...

  • Page 25

    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 10j carburetor exploded view & parts list 2 -1 1 -1 2 -2 1 -2 c . M 3 . 5 x 8 carburettor rubber gasket ball l...

  • Page 26

    The specifications are subject to alteration for improvement without notice. 10m carburettor exploded view & parts list 1 -1 9 -1 1 -2 carburettor rubber gasket dust cover carburettor body "o" ring (2pcs.) needle valve assembly throttle stop screw mixture control screw description code no. Throttle ...

  • Page 27: 12Tr Three View Drawing

    ■ displacement ■ bore ■ stroke ■ practical r.P.M. ■ power output ■ weight specifications 12tr three view drawing dimensions(mm) 31.4 11 4- φ 3.3 17.7 40.8 12.8 71.6 14.1 m5x0.8 2.11 cc (0.129 cu.In.) 14.0mm (0.551 in.) 13.7mm (0.539 in.) 4,000 ~ 36,000 r.P.M. 1.1 bhp / 30,000 r.P.M. 216.5g(7.5oz.) m...

  • Page 28: 12Tr(P) Three View Drawing

    12tr(p) three view drawing dimensions(mm) ■ displacement ■ bore ■ stroke ■ practical r.P.M. ■ power output ■ weight specifications 31.4 11 4- φ 3.3 17.7 34.8 12.8 71.6 29.6 1/4-28unf 2.11 cc (0.129 cu.In.) 14.0mm (0.551 in.) 13.7mm (0.539 in.) 4,000 ~ 36,000 r.P.M. 1.1 bhp / 30,000 r.P.M. 210g(7.27o...

  • Page 29: Memo

    Memo 28.

  • Page 30

    C copyright 2001 by o.S.Engines mfg. Co., ltd. All rights reserved. Printed in japan. 100100 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan url : http://www.Os-engines.Co.Jp u n eq ua ll ed qua lity precision & per for m an ce es ta blis hing t...