O.S. engine MAX-70SZ-Hring Owner's Instruction Manual
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O.S. engine MAX-70SZ-Hring Owner's Instruction Manual

O.S. engine MAX-70SZ-Hring Owner's Instruction Manual

Max-70sz-hring 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 model, radio control equipment, etc.,
are accessible for checking at the same time.
CONTENTS
RUNNING-IN, ADJUSTMENTSUBSEQUENT
2-5
READJUSTMENTS
6
7
8
9
10-11
ENGINE EXPLODED VIEW & PARTS LIST
12
13-14
15 16
1
17-20
21
22
23
24
25
26-27
28-29
30

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Summary of Contents for O.S. engine MAX-70SZ-Hring

  • Page 1: Table Of Contents

    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: 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 3 NOTES These engine were designed for model After starting the engine, carry out any needle- helicopters. Do not attempt to use it for any valve readjustments after stopping the rotor by other purpose. closing the throttle to the lowest r.p.m.. Stop the engine before attempting to make Mount the engine in your model securely, fol- other adjustments to the carburetor.

  • Page 4: Notes On Installing Cooling Fan And Clutch

    Notes on installing cooling fan and clutch Application is as follows: Do not use a tool which Remove the crankcase rear cover plate from the locks piston when engine and rotate the crankshaft to the bottom installing a cooling-fan dead center (BDC) position. and clutch, or top of Insert the crankshaft clamp so that its grooved piston...

  • Page 5: Basic Engine Parts

    INSTALLATION OF THE CARBURETOR BASIC ENGINE PARTS Fit the carburetor rubber gasket to the carburetor Carburetor Typr 60K body. Insert the carburetor seal washer into the Heatsink Head Glowplug carburetor fitting hole to the bottom. Insert the carburetor retainer into the holes shown left and fit the carburetor to the engine.

  • Page 6: Before Starting

    BEFORE STARTING Model engine fuel is also highly flammable. Keep it away from open flame, excessive Tools, accessories, etc. heat, sources of sparks, or anything else The following items are necessary for operating the which might ignite it. Do not smoke, or allow engine.

  • Page 7: Facts About Glowplugs

    FACTS ABOUT GLOWPLUGS Since the compatibility of glowplug and fuel may have However, plug life can be extended and engine a marked effect on performance and reliability, it may performance maintained by careful use, i.e.: be worthwhile to choose the R/C type plug found Install a plug suitable for the engine.

  • Page 8: Starting 15

    Graduations on the carburetor body BASIC POSITION OF MIXTURE CONTROL VALVE (Mixture Control Screw) Fully opened position As delivered, the Mixture Control Screw is positioned 86 degrees at the center as shown in the sketch. Carburetor Rotor Mixture gets lean when the Mixture Control Screw is turned right, while mixture gets rich when the Mixture Fully closed position Control Screw is turned left.
  • Page 9 NOTE: Preparation of starting Make sure that the transmitter If the throttle response is poor or the engine throttle stick is at the fully closed stops due to a temporarily over-rich mixture im- mediately after the engine is started, pinch the position and the throttle trim at center fuel line for one or two seconds until the engine position, and make sure that idle-up...
  • Page 10 ADJUSTMENT PROCEDURE The general course of adjustment procedure is shown in the ADJUSTING CHART and is correct As a safety measure, first check the transmitter for a fuel containing 20% lubricant and 15-30% controls, including the throttle stick and trim lever nitromethane.

  • Page 11: Subsequent Readjustments

    Now adjust the High-Speed Needle Valve to It is at this point that the Medium Speed Needle achieve the best performance when the model is Valve, previously kept one turn open, may be flying at full throttle. lf, at full throttle, acceleration brought into operation.

  • Page 12: Adjusting Chart

    ADJUSTING CHART High Speed Needle Valve - 2 turns opened from fully closed position. Medium Speed Needle Valve - 1 turns opened from fully closed position. Idle Mixture Control Screw - 2 turns opened from fully closed position. Start the engine Warm up the engine Observe the mixture condition while "floating"...

  • Page 13: Installation Of Throttle Servo

    INSTALLATION OF THROTTLE SERVO After the engine is installed in the helicopter, please observe the following recommendations when linking the throttle servo to the carburetor. Locate the servo so that its output arm and the throttle pushrod are, as close as possible, di- rectry in line with carburetor's throttle arm, as shown.

  • Page 14: O.s. Genuine Parts & Accessories

    O.S. GENUINE PARTS & ACCESSORIES MIXTURE CONTROL IN-FLIGHT CONTROL O.S. GLOW PLUGS DRIVE HUB CARBURETOR 60D NEEDLE VALVE (27708010) No.8 (27983000) (71705000) (71608001) (71605100) LONG SOCKET WRENCH SUPER FILTER CRANKSHAFT Cap Screw Set ( L ) (72403050) (10pcs. set) WITH PLUG GRIP CLAMP 7091 M2.6x5...
  • Page 15 ENGINE EXPLODED VIEW ENGINE PARTS LIST Description Code No. C.M3x15 27004300 Heatsink Head Cylinder Liner 27003100 27003400 Piston Ring 27003200 Piston 27006000 Piston Pin 27917000 Piston Pin Retainer (2pcs.) 27005000 Connecting Rod Carburetor Complete 60K 27081000 45010002 Propeller Nut 46120000 Thrust Washer Crankshaft Ball Bearing(Front) 26731002...

  • Page 16: Carburetor Exploded View

    CARBURETOR EXPLODED VIEW C.M3x8 Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw CARBURETOR PARTS LIST Description Description Code No. Code No. Throttle Lever Assembly "O"Ring (2pcs.) 27381410 24981837 Throttle Lever Retaining Screw (2pcs.) 22826131 46181940 Needle Valve Holder Assembly...

  • Page 17: Three View Drawing

    THREE VIEW DRAWING 12.5 12.5 SPECIFICATIONS 11.50 cc ( 0.702 cu.in. ) Displacement 25.8 mm ( 1.016 in. ) Bore 22.0 mm ( 0.866 in. ) Stroke Practical R.P.M. 2,000-18,000 r.p.m. Power output 2.5 ps / 16,000 r.p.m. 553.5 g ( 19.5oz. ) Weight JAPAN JAPAN...

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