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

Manual is about: Engines MAX-12/15LD, LD-X SERIES

Summary of MAX-12LD

  • 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 engine shield, installation throttle linkage air cleaner notes concerning the recoil starter glowplugs tools, accessories, etc. Carburetor controls starting the engine & running-in('breaking-in) if the ...

  • 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 tube from the tank. • warning! Immediately after a glowplug- ignition engine has been run and is still warm, conditions sometimes e...

  • Page 7: Engine Shield

    Installing the glowplug fit washer to glowplug and insert carefully into cylinder- head, making sure that it is not cross-threaded before tightening firmly. Glow plug washer engine shield if the engine shield has to be removed, e.G. For access to the carburettor, etc., apply a little l o c t i t e l...

  • Page 8: Throttle  Linkage

    Installation of e-1000 silencer (12/15ld ( t ) .Ld-x ( t ) ) fit the nipple (supplied) to the silencer, applying heat- resistant epoxy sealant at the roor of the fitting (see sketch). Before installing the engine in the chassis, secure the silencer to the en- gine with m3x27mm screws. Seal here appl...

  • Page 9

    • • • • ◆ ◆ ◆ notes concerning the recoil starter ( 12/15ld-x only) reminder! ◆ ◆ do not attempt to disassemble the recoil starter. If you do so, the very strong spring inside will be suddenly ejected. This can be very dangerous. Do not extend the starter cord more than 45cm(18"). Do not abruptly re...

  • Page 10: Glowplugs

    Glowplug life particularly in the case of very high performance engines, glowplugs must be regarded as expendable items. Fit 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...

  • Page 11: Tools, Accessories, Etc.

    Apart from when actually burned out, a plug may need to be replaced because it no longer delivers its best performance, such as when: when to replace the glowplug filament surface has roughened and turned white. Filament coil has become distorted. Foreign matter has adhered to filament or plug body ...

  • Page 12: Carburetor Controls (10F)

    Battery leads these are used to conduct current from the battery to the glowplug. For convenience,special leads with a suitable clip to fit the glowplug terminal, are commercially available. Long socket wrench recommended for easy removal and replacement of the angled and recessed glowplug, the o.S....

  • Page 13

    The somewhat violent changes of vehicle attitude that occur in off-road running, combined with the fact that, in buggy type cars, the fuel tank is often located some distance from the carburetor, means that fuel 'head' at the carburetor can vary and upset running.Therefore,it is recommended that a m...

  • Page 14: •

    Do not energize glowplug, but apply electric starter to draw fuel to carburetor. Now connect glowplug battery lead to heat the plug filament and start the engine. • rotating direction front rear • ■ starter handle in case of the 12/15ld-x push the choke button on the fuel tank several times to deliv...

  • Page 15: •

    If the engine should need to be disassembled (e.G. For cleaning or minor parts replacement) it is advisable to return the needle-valve to the original rich, starting setting and check whether further running-in time is required before the car is raced again. In the event of any major working parts (...

  • Page 16: Final Adjustment

    Run the vehicle (with throttle fully open) over the longest available straight course, in order to observe the model's speed. Next return the car to the starting point, close the needle-valve 30˚ and repeat the run, taking note of the improvement in performance. Continue with further runs, gradually...

  • Page 17: •

    With the optimum mixture control position, light smoke is visible during high speed running,and the engine revolutions increase smoothly during acceleration. Remember that, if the engine is operated with the fuel/air mixture slightly too lean, it will overheat and run unevenly. As with all engines, ...

  • Page 18: Care and Maintenance

    Realignment of mixture control valve ■ in the course of making carburetor adjustments, it is just possible that the mixture control valve may be inadvertently screwed in or out too far and thereby moved beyond its effective adjustment range.Its basic position can be found by first rotating the mixtu...

  • Page 19: Parts Replacement

    4. Then, inject some after-run oil into the engine, and rotate the engine with an electric starter for 4 to 5 seconds to distribute the oil to all the working parts. Note: 5. Do not inject after-run oil into the carburetor as this may cause the o-rings inside the carburetor to deteriorate. These pro...

  • Page 20

    Max-12, 15ld/ld(t) exploded view type of screw c … cap screw m … oval fillister-head 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 n . + m 3 x 2 7 c . M 2 . 6 x 1 2 ( 1 5 l d ) t r n . + m 2 . 6 x 1 5 m . + m 2 . 6 x 1 2 ( 1 2 l d ) m . + m 2 . 6 x 7 20 ✽.

  • Page 21

    Max-12,15ld/ld(t) engine parts list the specifications are subject to alteration for improvement without notice. 104 filter elements (3pcs.) screw set glow plug a3 gasket set crankshaft crankshaft ball bearing (rear) crankcase crankshaft ball bearing (front) carburetor complete (type 10f) connecting...

  • Page 22

    Max-12, 15ld-x/ld-x(t) exploded view type of screw c … cap screw m … oval fillister-head 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 n . + m 3 x 2 7 c . M 2 . 6 x 1 2 ( 1 5 l d - x ) t r n . + m 2 . 6 x 1 5 m . + m 2 . 6 x 1 2 ( 1 2 l d - x ) n . + m 2 ...

  • Page 23

    Max-12,15ld-x/ld-x(t) engine parts list the specifications are subject to alteration for improvement without notice. Description code no. No.5 recoil starter assembly no.5 recoil starter body no.5 one-way clutch e w q = - 0 9 8 7 6 5 4 3 2 1 7 1608 001 7 1605 300 2 1524 000 2 1164 000 2 1152 010 2 1...

  • Page 24: 10F Carburetor Exploded

    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 ball link no.2 dust cover slide valve extension metering needle assembly slide valve slide valve guide screw c...

  • Page 25: Racing Engine Parts

    Racing engine parts (21325000) o.S. Genuine parts & accessories ■ o.S. Glow plug (71608001) (71605300) (71605100) no.8 a3 a5 ■ (72403420) 104 filter elements (3pcs.) ■ (72103310) super joint tube 15 ■ (72103020) t-1020 tuned silencer φ 4 (73300305) φ 7 (73300712) dust cap set ■ for carburettor nippl...

  • Page 26: 12/15Ld Three View Drawing

    41 4-m3x0.5 5.5 23 18 15.7 15.7 46.6 22.3 m5x0.8 ■ displacement ■ bore ■ stroke ■ practical r.P.M. ■ power output ■ weight max-12ld specifications 12/15ld three view drawing 2.11 cc(0.129cu.In.) 14.0 mm(0.551in.) 13.7 mm(0.539in.) 3,000 ~ 30,000 r.P.M. 0.56 bhp / 29,000 r.P.M. 273g(9.64oz.) dimensio...

  • Page 27: 12/15Ld-X Three View Drawing

    M5x0.8 18 35.7 41 23.3 4-m3x0.5 5.5 23 15.7 15.7 46.6 17.3 4 12/15ld-x three view drawing dimensions(mm) ■ displacement ■ bore ■ stroke ■ practical r.P.M. ■ power output ■ weight max-12ld-x specifications 2.11 cc(0.129cu.In.) 14.0 mm(0.551in.) 13.7 mm(0.539in.) 3,000 ~ 30,000 r.P.M. 0.56 bhp / 29,00...

  • Page 28: Memo

    Memo 28.

  • Page 29

    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 100000 tel. (06) 6702-0225 fax. (06) 6704-2722 6-15 3-chome imagawa higashisumiyoshi-ku osaka 546-0003, japan url : h...