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

Page: 14 / 17

(71608001)

(71521000)

(L)

No.8

(71605100)

(72403050)

(71705000)

(55500003)

(27708010)

LONG SOCKET WRENCH
WITH PLUG GRIP

SUPER FILTER

O.S. GLOW PLUGS

IN-FLIGHT CONTROL
NEEDLE VALVE

LOCK WASHER
M4

O.S. GENUINE PARTS & ACCESSORIES

DRIVE HUB

CRANKSHAFT
CLAMP

(10set)

Cap Screw Set

M2.6x5

(10pcs. set)

(79871010)

7091

(71530500)

(For 70SZ-H, 91SX-H)

(27983000)

MIXTURE CONTROL
CARBURETOR 60D

Summary of Contents for MAX-70SZ-Hring

Page 1: ...ons supplied with the model radio control equipment etc are accessible for checking at the same time 1 CONTENTS 2 5 6 10 11 12 15 16 17 20 21 22 23 28 29 25 7 8 13 14 26 27 24 9 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE NOTES ON INSTALLING COOLING FAN AND CLUTCH INTRODUCTION BASIC ENGINE PARTS INSTALLATION OF THE CARBURETOR INSTALLATION OF THE ENGINE BEFORE STARTING FACTS ABOUT GLOW P...

Page 2: ... many other possibilities generally less obvious sources of danger but which under certain circumstances may also cause damage or injury 3 WARNINGS Never touch or allow any object to come into contact with the rotating parts Model engine fuel is poison ous 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 Mode...

Page 3: ...r head down securely Take care that the glow plug clip or battery leads do not come into contact with rotating parts Adjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully retarded Alternatively the engine may be stopped by cutting off the fuel supply Never try to stop the engine physically 5 NOTES Take care that loose clothing ties...

Page 4: ... as F3C competition It may be replaced with the current 60 size helicopter engine without changing the gear ratio as the mounting bolt pattern is the same Also the six mounting bolt pattern increases fore and aft rigidity New design 60K carburetor has three adjustable controls which enables independent adjustment at idling hovering and high speed INTRODUCTION Standard accessories Because of initia...

Page 5: ... the washer on the glowplug and screw carefully into cylinder head making sure that it is not cross threaded before tightening firmly Front view CORRECT Side view Top surfaces are in the same plane Re align the surfaces as necessary INCORRECT Top surfaces are not in the same plane Top surfaces are not in the same plane Engine does not rest firmly Make sure that only the under surfaces of the engin...

Page 6: ... from the battery to the glowplug Basically two leads with clips are required but for greater conve nience twin leads with special glowplug connectors as shown on the right are commercially available Model engine fuel is also highly flammable Keep it away from open flame excessive heat sources of sparks or anything else which might ignite it Do not smoke or allow anyone else to smoke near to it Ba...

Page 7: ... serious threat to the safety of the aircraft since it can usually glide down to a safe landing In a helicopter on the other hand it is vitally imporant that the engine keeps running and that there is a quick and reliable response to the throttle in order to ensure safe ascent and descent of the model The High Speed Main Needle Valve When set to produce maximum power at full throttle this establis...

Page 8: ...ngine and rotor before checking the triangle mark position Graduations on the carburetor body Carburetor Rotor Carburetor Body Fully closed position Fully opened position 15 STARTING Close Open Be sure to use a muffler pressurized fuel feed Use the same fuel as you intend to employ for actual operation of your model 1 2 Opening and closing of the Needle Valve Turn the needle clockwise to close the...

Page 9: ... allow any object to come into contact with the rotating rotor 17 All internal combustion engines benefit to some degree from extra care when they are run for the first few times known as running in or breaking in This is allows the working parts to mate together under load at operating temperature However because O S engines are made with the aid of the finest modern precision machinely and from ...

Page 10: ...to cut out when the throttle is opened ln this case turn the Mixture Control Screw counter clockwise 10 degrees to enrich the mixture ADJUSTMENT PROCEDURE 1 19 Having provisionally set the idle mixture the next step is to adjust the mixture for hovering flight Hover the model and actuate the throttle to observe response over the medium speed range lf the engine smokes excessiveIy and throttle resp...

Page 11: ... minute particles of foreign matter that are present in any fuel can easily partially obstruct these orifices and upset mixture strength so that engine performance becomes erratic and unreliable It is recommended that fuel is passed through a filter when the tank is filled and that a good in line filter is installed between the fuel tank and carburetor and furthermore that this filter is frequentl...

Page 12: ...igh Speed Needle Valve Turn clockwise Land the model Idle for approx 10 seconds then reopen throttle to observe transition Float the model Idling OK Lean mixture Rich mixture High Speed Flight Lean mixture Rich mixture High Speed Flight OK Fine tuning of hovering mixture Open the Medium Speed Needle Valve Hovering OK Adjustment completed Open the High Speed Needle Valve Turn counter clockwise Clos...

Page 13: ...side your refueling container will prevent the entry of foreign material into the fuel tank It is also recommended that a good in line filter be installed between the tank and carburetor 1 Finally injectsomeafter runoilintotheengine Rotate the engine a few times by hand to make sure that it is free and then with an electric starter for 4 to 5 seconds to distribute the oil to all the working parts ...

Page 14: ...NG SOCKET WRENCH WITH PLUG GRIP SUPER FILTER O S GLOW PLUGS IN FLIGHT CONTROL NEEDLE VALVE LOCK WASHER M4 O S GENUINE PARTS ACCESSORIES DRIVE HUB CRANKSHAFT CLAMP 10set Cap Screw Set M2 6x5 10pcs set 79871010 7091 71530500 For 70SZ H 91SX H 27983000 MIXTURE CONTROL CARBURETOR 60D ...

Page 15: ...Ball Bearing Rear Crankcase Crankshaft Ball Bearing Front Thrust Washer Propeller Nut Carburetor Retainer Assembly Carburetor Complete 60K Connecting Rod Piston Pin Cylinder Liner Heatsink Head No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Code No Description Piston Ring Piston Piston Pin Retainer 2pcs Glow Plug No 8 27004300 27003100 27003400 27003200 27006000 27917000 27005000 27081000 4501000...

Page 16: ...ning Screw 2pcs Throttle Lever Assembly Description Code No Mixture Control Screw Mixture Control Valve Stopper Needle Valve Holder Assembly 1 1 1 2 3 3 1 3 2 3 3 4 5 6 7 8 8 1 O Ring L 2pcs O Ring S 2pcs O Ring 2pcs CARBURETOR PARTS LIST 27681340 27881330 27081100 45581820 27881820 27881800 27881810 27081600 27081200 22826131 27381410 27081900 27981910 24981837 46181940 46181941 26711305 46181950...

Page 17: ...G Displacement Bore Stroke Practical R P M Power output Weight SPECIFICATIONS Dimensions mm C Copyright 2002 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan URL http www os engines co jp U N E Q U A LLED QUALITY PRECISION PERFOR M A N C E E S T A BLISHING THE STANDARDS OF EXCELLE N C E 60...

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