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O.S. engine MAX-15CV-R Series Owner's Instructions Manual
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O.S. engine MAX-15CV-R Series Owner's Instructions Manual

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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-15CV-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 CARBURETOR 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

    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 future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner.
  • 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-15CV-R is high-perfomance BASIC ENGINE PARTS engines for 1/10 class R/C racing cars. Heatsink Head There are two verions, the one with 10E- R carburettor and the other with 10C carburetor. Carburetor Standard accessories Glow Plug No.8 Super Air Cleaner 102 Cover Plate 102 Cleaner Body 101,102 Filter Elements (3pcs.)

  • Page 8: Installation 7

    INSTALLATION OF THE CARBURETOR ENGINE INSTALLATION As delivered, the engine has its carburetor Make sure that the vehicle's engine mounting lightly install 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 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 carburetor. 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. ( 15CV-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: Carburetor Controls

    BATTERY INTEGRATED GLOWPLUG HEATER CARBURETOR CONTROLS ( 10C ) Commercialy available handy Three adjustable controls are provided on this glowplug heater in which the carburetor. 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

    CARBURETOR 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 carburetor. 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 caburetor 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: Carburetor Cleanliness

    CARBURETOR CLEANLINESS The correct functioning of the carburetor depends on its small fuel orifices remaining clear. BALL LINK AND SLIDE VALVE EXTENSION In case of the 10C caburetor (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: 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

    15CV-R EXPLODED VIEW Not included in 15CV-R(S) C. M2 .6 x12 C.M2. 6x 7 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw...

  • Page 24: Parts List

    15CV-R ENGINE PARTS LIST Code No. Description 21504600 Heatsink Head 21503020 Cylinder & Piston Assembly 21806000 Piston Pin 23817000 Piston Pin Retainer(2pcs.) 21255000 Connecting Rod 21286000 Carburetor Complete (Type 10C) 21481020 Carburetor Complete (Type 10E-R) 21481700 Carburetor Retainer 20810007 Propeller Nut 21408000 Drive Hub 22631020...
  • Page 25 15CV-RX EXPLODED VIEW C . M 2 . 6 x 1 2 M . + M 2 . 6 x 7 M . + M 2 . 6 x 7 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F …...
  • Page 26 15CV-RX ENGINE PARTS LIST Description Code No. 21504600 Heatsink Head 21503020 Cylinder & Piston Assembly 21806000 Piston Pin 23817000 Piston Pin Retainer(2pcs.) 21255000 Connecting Rod 21286000 Carburetor Complete (Type 10C) 21481020 Carburetor Complete (Type 10E-R) 21481700 Carburetor Retainer 20810007 Propeller Nut 21408000 Drive Hub 22631020...
  • Page 27 15CV-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 15CV-R(P) ENGINE PARTS LIST Description Code No. 21504600 Heatsink Head 21503020 Cylinder & Piston Assembly 21806000 Piston Pin 23817000 Piston Pin Retainer(2pcs.) 21255000 Connecting Rod 21286000 Carburetor Complete (Type 10C) 21481700 Carburetor Retainer 22631020 Crankshaft Ball Bearing (Front) 21501030 Crankcase 21230020 Crankshaft Ball Bearing (Rear) 21252020...

  • Page 29: Carburetor Exploded View & Parts List

    10C CARBURETOR EXPLODED VIEW & PARTS LIST Description Code No. Mixture Control Valve Assembly 21285600 "O" Ring(L) (2pcs.) 46066319 22781800 "O" Ring(S) (2pcs.) 21285640 Throttle Stop Screw Needle Valve Assembly 21285901 27881820 "O" Ring (2pcs.) 21286100 Carburetor Body 21285220 Slide Valve Guide Screw 21286200 Slide Valve Metering Needle Assembly...
  • Page 30 10E-R CARBURETOR EXPLODED VIEW & PARTS LIST Code No. Description 21481600 Mixture Control Screw 27881820 "O" Ring (2pcs.) 21481420 Throttle Lever Fixing Nut 22681419 Throttle Lever 21283210 Dust Cover 21481200 Carburetor Rotor 22481506 Rotor Spring 21283962 Nozzle Assembly 24881824 "O" Ring 21283961 Locknut 21481120...

  • Page 31: Three View Drawing 30

    15CV-R THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS 2.49 cc ( 0.152 cu.in. ) Displacement 15.2mm (0 .598 in. ) Bore 13.7mm ( 0.539 in. ) Stroke 4,000 36,000 r.p.m. Practical R.P.M. M5x0.8 1.2 bhp / 31,000 r.p.m. Power output 195g(6.88oz.) Weight 27.5...
  • Page 32 15CV-RX THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS 2.49 cc ( 0.152 cu.in. ) Displacement 15.2mm (0 .598 in. ) Bore 13.7mm ( 0.539 in. ) Stroke 4,000 36,000 r.p.m. Practical R.P.M. M5X0.8 1.2 bhp / 31,000 r.p.m. Power output 253g(8.924oz.) Weight 27.5 33.8 88.8...

  • Page 33: Three View Drawing

    15CV-R(P) THREE VIEW DRAWING Dimensions(mm) SPECIFICATIONS 2.49 cc ( 0.152 cu.in. ) Displacement 15.2mm (0 .598 in. ) Bore 13.7mm ( 0.539 in. ) Stroke 4,000 36,000 r.p.m. Practical R.P.M. UNF1/4-28 1.2 bhp / 31,000 r.p.m. Power output 193.2g(6.82oz.) Weight 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 2001 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 120101...

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