O.S. engine MAX-12CV-R Series Owner's Instruction Manual
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O.S. engine MAX-12CV-R Series Owner's Instruction Manual

Max-12cv-r engine
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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 familiarize yourself
with the controls and other features of the
engine.
•
Keep these instructions in a safe place so that
you may readily refer to them whenever
necessary.
•
It is suggested that any instructions supplied
with the vehicle, radio control equipment, etc.,
are accessible for checking at the same time.

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Summary of Contents for O.S. engine MAX-12CV-R 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 familiarize yourself with the controls and other features of the engine.

  • Page 2: Table Of Contents

    CONTENTS SAFETY INSTRUCTIONS AND IF THE ENGINE FAILS TO START WARNINGS ABOUT YOUR O.S. ENGINE FINAL ADJUSTMENT INTRODUCTION, BASIC ENGINE PARTS CARBURETTOR CLEANLINESS INSTALLATION CARE AND MAINTENANCE AIR CLEANER O.S. GENUINE PARTS & NOTES CONCERNING THE RECOIL STARTER ACCESSORIES GLOWPLUG ENGINES EXPLODED VIEW &...

  • Page 3: Safety Instructions And Warnings About Your O.s. Engine

    SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE 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.
  • Page 4 WARNINGS • • Model engine fuel is poi- Never operate your engine in an en- closed space. Model engines, like sonous. Do not allow it to automobile engines, exhaust deadly come into contact with the eyes or mouth. Always carbon-monoxide. Run your engine store it in a clearly marked only in an open area.
  • Page 5 NOTES • This engine is intended for model cars. • The wearing of safety glasses is also Do not attempt to use it for any other strongly recommended. purpose. • Take care that the glowplug clip or • Mount the engine in your model battery leads do not come into contact securely, following the manufacturers' recommendations, using appropriate...
  • Page 6 NOTES • To stop the engine, fully retard the • Pull the operating handle straight out throttle stick and trim lever on the when starting the engine, so that the trans-mitter, or, in an emergency, cut cord does not rub against the vehicle off the fuel supply by pinching the fuel body or engine.

  • Page 7: Introduction, Basic Engine Parts

    The MAX-12CV-R and MAX-12CV-RX are BASIC ENGINE PARTS high-perfomance engines for 1/10 class R/C racing cars. There are two verions, the Heatsink Heat one with 10E-R carburettor and the other with 10C carburettor. The MAX-12CV-R has a conventional crankshaft, while the...

  • Page 8: Installation 7

    INSTALLATION OF THE CARBURETTOR ENGINE INSTALLATION As delivered, the engine has its carburettor Make sure that the vehicle's engine mounting lightly fit into the intake boss. Secure it as surfaces are level and in the same plane. Poor follows. installation may cause distortion of the crankcase, bearings, etc., resulting in erratic Loosen the retainer screw, rotate the running and loss of performance.

  • Page 9: Installation

    Avoid forcing the screws. Secure with locknuts. AIR CLEANER TYPE 102 If the bottom of the recoil starter housing would This is a heavy-duty wet type air cleaner that has otherwise touch the car chassis, fit the engine been developed specifically for the O.S. MAX-CV mount spacers (supplied) between the engine's series model car engines.

  • Page 10: Air Cleaner 8

    • Position the air cleaner correctly, so that it does not Always remove contaminated elements carefully, to foul the cylinder-head or obstruct the needle-valve. ensure that dirt cannot enter the carburettor. AIR CLEANER ELEMENTS AIR CLEANER TYPE 102S • Replacement elements Upper Filter Lower Filter It has a single filter element and is intended primarily...

  • Page 11: Notes Concerning The Recoil Starter

    • Position the air cleaner correctly, so that it does not NOTES CONCERNING THE RECOIL STARTER foul the cylinder-head or obstruct the needle-valve. ( 12CV-RX ONLY) REMINDER! INSTALLING THE FILTER ELEMENT Do not attempt to disassemble the recoil • The element is already impregnated with a special starter.

  • Page 12: Glowplug 11

    The starter prevents the engine from being The role of the glowplug rotated in the wrong direction.The unit will With a glowplug engine, ignition is initiated by the application of a 1.5-volt power source. When the be damaged if you attempt to force the fly- battery is disconnected, the heat retained within the wheel in the opposite direction (i.e.

  • Page 13: Tools, Accessories, Etc

    When to replace the glowplug As a starting point, we recommend a fuel containing 10-20% nitromethane, changing to a fuel containing Apart from when actually burned out, a plug may more nitro only if necessary. When the nitro content of need to be replaced because it no longer delivers its the fuel is increased or the brand of fuel is changed, it best performance, such as when:...

  • Page 14: Carburettor Controls

    BATTERY INTEGRATED GLOWPLUG HEATER CARBURETTOR CONTROLS ( 10C ) Commercialy available handy Three adjustable controls are provided on this glowplug heater in which the carburettor. glowplug battery and battery The Needle-Valve: • leads are integrated. For adjusting the mixture strength when the throttle is fully open.

  • Page 15: Pressurized Fuel System

    CARBURETTOR CONTROLS ( 10E-R ) PRESSURIZED FUEL SYSTEM • The somewhat violent changes of vehicle attitude Three adjustable controls are provided on this that occur in off-road running, combined with the carburettor. fact that, in buggy type cars, the fuel tank is often The Needle-Valve: •...

  • Page 16: Starting The Engine & Running-In('Breaking-In) 15

    STARTING THE ENGINE & RUNNING-IN ('Breaking-in') The following procedure is suitable for these engines In case of the 10E-R caburettor approx 1mm • when the O.S. T-1020 tuned silencer and a fuel Set the throttle-stop screw so containing up to 30% nitromethane are used. that the minimum throttle •...
  • Page 17 Remember! be opened for brief bursts of increased power. If the It is vitally important to set the engine stops at medium speeds, close the Mixture throttle at the correct position Screw 45-90˚. before attempting to start the The position of the needle-valve engine.

  • Page 18: If The Engine Fails To Start

    FINAL ADJUSTMENT IF THE ENGINE FAILS TO START • Check the following: Run the vehicle (with throttle fully open) over the longest available straight course, in order to observe • Glowplug battery discharged or glowplug defunct. the model's speed. Next return the car to the starting •...
  • Page 19 • • In this case, turn the Mixture Control Valve With the optimum mixture control position, light clockwise 45~90˚. If, on the other hand, the engine smoke is visible during high speed running,and the tends to speed up momentarily and then cut out engine revolutions increase smoothly during abruptly when the throttle is opened,the idling acceleration.

  • Page 20: Carburettor Cleanliness

    CARBURETTOR CLEANLINESS The correct functioning of the carburettor depends on its small fuel orifices remaining clear. BALL LINK AND SLIDE VALVE EXTENSION In case of the 10C caburettor (In case of the 10C caburettor) First rotate the Mixture Control It is seldom necessary to separate the slide-valve Valve until its slotted head is extension from the slide-valve itself.

  • Page 21: Care And Maintenance

    Then, inject some after-run oil into the engine, and CARE AND MAINTENANCE rotate the engine with an electric starter for 4 to 5 The minute particles of foreign matter, that are seconds to distribute the oil to all the working present in any fuel may, by accumulating and parts.

  • Page 22: O.s. Genuine Parts & Accessories

    O.S. GENUINE PARTS & ACCESSORIES RACING ENGINE PARTS Exhaust Header Pipes 10C Automatic O.S. Glow Plug For Tamiya TGX For Kyosho Super10 Carburettor For MUGEN MTX ( 71608001 ) No.8 ( 72103120 ) ( 72103150 ) ( 72103110 ) ( 21286000 ) ( 71605300 ) For Kyosho ( 71605100 )

  • Page 23: Engines Exploded View & Parts List 22

    12CV-R EXPLODED VIEW C.M2.6x12 C.M2.6x7 Not included in 12CV-R(S) Type of screw C Cap Screw M Oval Fillister-Head Screw F Flat Head Screw N Round Head Screw S Set Screw...
  • Page 24 12CV-R ENGINE PARTS LIST Description Code No. 2 1254 000 Heatsink Head 2 1253 000 Cylinder & Piston Assembly 2 1256 000 Piston Pin 2 3817 000 Piston Pin Retainer(2pcs.) 2 1255 000 Connecting Rod 2 1286 000 Carburettor Complete (Type 10C) 2 1481 010 Carburettor Complete (Type 10E-R) 2 1481 700...
  • Page 25 12CV-RX EXPLODED VIEW Not included in 12CV-RX(S) C . M 2 . 6 x 1 2 M . + M 2 . 6 x 7 u -1 u - 2 M . + M 2 . 6 x 7 Type of screw C Cap Screw M Oval Fillister-Head Screw F Flat Head Screw N Round Head Screw S Set Screw...
  • Page 26 12CV-RX ENGINE PARTS LIST Description Code No. 2 1254 000 Heatsink Head 2 1253 000 Cylinder & Piston Assembly 2 1256 000 Piston Pin 2 3817 000 Piston Pin Retainer(2pcs.) 2 1255 000 Connecting Rod 2 1286 000 Carburettor Complete (Type 10C) 2 1481 020 Carburettor Complete (Type 10E-R) 2 1481 700...
  • Page 27 12CV-R(P) EXPLODED VIEW C . M 2 . 6 x 1 2 C . M 2 . 6 x 7 Type of screw C Cap Screw M Oval Fillister-Head Screw F Flat Head Screw N Round Head Screw S Set Screw...

  • Page 28: Parts List

    12CV-R(P) ENGINE PARTS LIST Description Code No. 2 1254 000 Heatsink Head 2 1253 000 Cylinder & Piston Assembly 2 1256 000 Piston Pin 2 3817 000 Piston Pin Retainer(2pcs.) Connecting Rod 2 1255 000 2 1286 000 Carburettor Complete (Type 10C) 2 1481 700 Carburettor Retainer 2 2631 020...

  • Page 29: Carburettor Exploded View & Parts List 28

    10C CARBURETOR EXPLODED VIEW & PARTS LIST Description Code No. 2 1285 600 Mixture Control Valve Assembly "O" Ring(L) (2pcs.) 4 6066 319 2 2781 800 "O" Ring(S) (2pcs.) 2 1285 640 Throttle Stop Screw 2 1285 901 Needle Valve Assembly 2 7881 820 "O"...
  • Page 30 10E-R CARBURETTOR EXPLODED VIEW & PARTS LIST Code No. Description 2 1481 600 Mixture Control Screw -1 2 7881 820 "O" Ring (2pcs.) Throttle Lever Fixing Nut 2 1481 420 2 2681 419 Throttle Lever 2 1283 210 Dust Cover 2 1481 200 Carburettor Rotor 2 2481 506...

  • Page 31: Three View Drawing 30

    12CV-R THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS Displacement 2.11 cc(0.129cu.in.) Bore 14.0 mm(0.551in.) Stroke 13.7 mm(0.539in.) Practical R.P.M. 4,000 36,000 r.p.m. M5x0.8 Power output 1.0 bhp / 31,000 r.p.m. Weight 200g(7.05oz.) 27.5...
  • Page 32 12CV-RX THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS Displacement 2.11 cc(0.129cu.in.) Bore 14.0 mm(0.551in.) Stroke 13.7 mm(0.539in.) M5x0.8 Practical R.P.M. 4,000 36,000 r.p.m. Power output 1.0 bhp / 31,000 r.p.m. Weight 258g(9.10oz.) 27.5 33.8 88.8...

  • Page 33: Three View Drawing

    12CV-R(P) THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS Displacement 2.11 cc(0.129cu.in.) Bore 14.0 mm(0.551in.) Stroke 13.7 mm(0.539in.) Practical R.P.M. 4,000 36,000 r.p.m. UNF1/4-28 Power output 1.0 bhp / 31,000 r.p.m. Weight 198g(6.99oz.) 27.5 34.8 79.3...
  • Page 34 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 FAX. (06) 6704-2722 URL : http://www.os-engines.co.jp Copyright 2000 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 070101...

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