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O.S. engine MAX-32SX-MX Owner's Instruction 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-32SX-MX

  • 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 IF THE ENGINE FAILS TO START SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE ADJUSTMENT INTRODUCTION, BASIC ENGINE PARTS CARE AND MAINTENANCE INSTALLATION O.S. GENUINE PARTS & NOTES CONCERING ACCESSORIES THE RECOIL STARTER THREE VIEW DRAWING GLOWPLUG ENGINE EXPLODED VIEW TOOLS, ACCESSORIES, etc.

  • 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 • Never touch, or allow any • Never operate your engine in an en- object to come into contact closed space. Model engines, like auto- with, the rotating propeller and mobile engines, exhaust deadly carbon- do not crouch over the engine monoxide.
  • Page 5 NOTES • This engine was designed for model boats. • Take care that the glowplug clip or battery Do not attempt to use it for any other purpose. leads do not come into contact with the propeller or any other rotating parts. Also Mount the engine in your model securely, •...
  • Page 6 NOTES • Adjust the throttle linkage so that the • If your engine is fitted with a recoil starter, engine stops when the throttle stick and pull the operating handle straight out when trim lever on the transmitter are fully starting the engine, so that the cord does retarded.

  • Page 7: Introduction, Basic Engine Parts

    The O.S. MAX-32SX-MX is a high-perfor- BASIC ENGINE PARTS mance water-cooled marine engine for small Water Cooled Head Carburettor Type 20C radio-controlled boats, especially scale and Starter Handle sport type hulls. The MAX-32SX-MX incor- porates a recoil starter system which pro-...

  • Page 8: Installation

    INSTALLATION Make sure that the engine mounting beams in the hull are parallel, with their top surfaces in the same plane. If they are not, the engine will not rest firmly as the engine mounting faces (undersides of the mounting lugs) are precision machined to be flat Chamfer inside edges of bearers.

  • Page 9: Glowplug

    Try to avoid spilling fuel over the starter unit For higher nitro fuel, a cold rated plug may be and its cord. Some fuels have a detrimental required, whereas, for lower nitro fuel, a hot rated effect on these parts. plug may be best.

  • Page 10: Tools, Accessories, Etc

    Do not run the engine too lean and do not leave the When the brand of fuel is changed, or the nitro ¡ battery connected while adjusting needle. content increased, it is advisable to repeat the running-in procedure referred to in the RUNNING-IN When to replace the glowplug paragraphs.
  • Page 11 PROPELLER LONG SOCKET WRENCH Recommended for easy removal and replacement of Use well balanced propellers only. As the ideal the deeply recessed glowplug, the O.S. Long Socket diameter, pitch and shape vary according to the size, Wrench incorporates a special grip.(See Parts List) weight and type of model, final selection can be made after practical experiment.

  • Page 12: Carburettor Controls

    REALIGNMENT OF MIXTURE CONTROL VALVE CARBURETTOR CONTROLS In the course of making carburettor adjustments, it is Two adjustable controls are provided on this carburettor. just possible that the Mixture Control Valve may be The Needle Valve: inadvertently screwed in or out too far and thereby When set to produce maximum power at full throt- moved beyond its effective adjustment range.

  • Page 13: Starting & Initial Running-In('Breaking-In) 12

    Pull the starter handle needs to be 'run-in' or 'broken-in'. With care, running- briskly straight out several in of the MAX-32SX-MX can be carried out with it in- times to start the engine. stalled in the boat. Be sure to use a muffler-pressu- rized fuel system.

  • Page 14: If The Engine Fails To Start

    Next restart the engine, disconnect the glowplug IF THE ENGINE FAILS TO START battery and lower the boat into the water, gradually opening the throttle sufficiently to prevent the Check the following: engine from stalling as the propeller takes up the Glowplug battery discharged or glowplug defunct.
  • Page 15 If the needle-valve is closed beyond the optimum If, on the other hand, the idling mixture is too lean, setting, the model will slow down, accompanied by the engine is likely to speed up momentarily, then visibly diminished exhaust smoke. In this case, im- cut out abruptly when the throttle is re-opened.

  • Page 16: Care And Maintenance 15

    When the best balance of mixture adjustments has O.S. 'Super-Filters' (large and small) are available, been determined and, especially as the engine be- as optional extras,to deal with this problem. comes fully run-in, it will probably be found that the One of these filters, fitted to the outlet tube inside idling speed has increased.

  • Page 17: Genuine Parts & Accessories

    Drain the water remaining in the water cooling O.S. GENUINE PARTS & ACCESSORIES head, and wash out with methanol, then inject cor- rosion-inhibiting or moisture-displacing oil. E-3030 Silencer O.S. Glow Plug When cleaning the exterior of the engine, use me- (23325020) No.8 thanol or kerosene.

  • Page 18: Three View Drawing

    THREE VIEW DRAWING 4- φ 3.3 SPECIFICATIONS Displacement 5.23 cc/0.319 cu. in Bore 19.5 mm/0.768 in Stroke 17.5 mm/0.689 in Practical r.p.m.Range 2,500 21,000 r.p.m. Output 1.1 bhp / 17,000 r.p.m. Weight 423g/14.92 oz. 85.7 41.7 30.6 Dimensions (mm)

  • Page 19: Engine Exploded View

    EXPLODED VIEW C.M2.6X18 Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw...

  • Page 20: Engine Parts List

    ENGINE PARTS LIST Description Code No. 2 3441 000 Water Cooled Head Assembly Nipple No.2 2 4025 923 Cylinder & Piston Assembly 2 3403 000 Piston Pin 2 3406 000 Connecting Rod 2 3405 000 Carburettor Complete(Type 20C) 2 3481 000 Carburettor Rubber Gasket 2 2615 000 Carburettor Retaining Screw(2pcs.)

  • Page 21: Carburettor Exploded View & Parts List

    20C CARBURETTOR EXPLODED VIEW & PARTS LIST Description Code No. Throttle Lever Assembly 23481400 1 -2 Throttle Lever 22781410 1 -1 Throttle Lever Fixing Screw 22781420 Throttle Lever 22781411 Carburettor Rotor 23481200 Mixture Control Valve Spring 23481650 23481100 Carburettor Body "O"Ring (2pcs.) 24881824 Rotor Spring...
  • Page 22 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 FAX. (06) 6704-2722 Copyright 2000 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 090101...

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