Table of Contents
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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.
INSTALLATION OF THROTTLE SERVO
NOTES ON HEATING THE GLOW PLUG
INTRODUCTION, ENGINE PARTS NAME
INSTALLATION OF THE GLOW PLUG & CARBURETOR
CONTENTS
2-5
STARTING, RUNNING-IN ("Breakingin")
6-7
ADJUSTMENT CHART
8-9
10-12
ENGINE EXPLODED VIEW & PARTS LIST
13-16
17
18
MEMO
19-20
1
21-25
26-30
31
32-33
34-37
38-39
40-41
42
43
44
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Table of Contents
Related Manuals for O.S. engine MAX-55HZ HYPER
Summary of Contents for O.S. engine MAX-55HZ HYPER
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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 • • This engine was 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 •...
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Page 4: Notes On Installing Cooling-Fan And Clutch
Notes on installing cooling fan and clutch Do not use a tool which locks piston when installing a cooling-fan and clutch, or top of the piston may be damaged. Also, do not insert a screw driver or the similar into the exhaust port. -
Page 5: Notes When Applying An Electric Starter
NOTES WHEN APPLYING AN ELECTRIC STARTER Because of this initial tightness, a standard electric starter may have difficulty in rotating the engine when cold, before it has been adequately run-in. In this case, use a high-torque type starter. Do not over-prime. This could cause a hydraulic lock and damage the engine on application of the electric starter. - Page 6 Note on heating the glow plug Example The heatsink head on the engine is treated with an anodized finish which does not conduct current. Therefore, when heating a glow plug, connect one lead to the glow plug and the other to the cover plate retaining screw.
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Page 7: Engine Parts Name
ENGINE PARTS NAME Glowplug Heatsink Head Throttle Lever Idle Mixture Control Screw Carburetor Mixture Control Valve Type 40L Fuel Inlet High Speed Needle Valve Mixture Control Valve Stopper Thrust Washer Medium Speed Cover Plate Needle Valve Beam Mount Carburetor Rubber Gasket Crankcase Propeller nut Crankshaft... - Page 8 Fuel Pump Fuel Alternatively, one of the purpose-made Select, by practical tests, the most suitable fuel from among Manual the best quality fuels available in your country for helicopter manual or electric fuel pumps may be use. For the best throttle response, a fuel containing 10% to used to transfer fuel directly from your 30% nitromethane is preferable.
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Page 9: Installation Of The Engine
INSTALLATION OF THE ENGINE The under-surfaces of all O.S. engine beam CORRECT mounting lugs are precision machined flat and exactyly parallel to the engine's horizontal axis. It is essential that the engine mounts in the model are also accurately made and aligned. If they are not, Front view Side view they will cause stress and distortion within the engine... -
Page 10: Glowplugs
GLOWPLUG Glowplug life Since the glowplug and fuel combination Particularly in the case of very high performance used may have a marked effect on engines, glowplugs must be regarded as expendable performance and reliability, it would be items. However, plug life can be extended and engine worthwhile to experiment with different performance maintained by careful use, i.e.: plug types. - Page 11 GRADUATIONS ON THE CARBURETOR BODY BASIC POSITION OF MIXTURE CONTROL SCREW (Mixture Control Valve) As shown in the sketch, the carburetor has graduation marks. As delivered, the Mixture Control Screw is positioned at approximately the center as shown in Fully opened position the sketch.
- Page 12 Opening and closing of the Needle-Valve Medium Speed needle-valve: exactly two turns open from the fully closed Turn the needle clockwise to close the needle- position. valve, and turn the needle counter-clockwise to open the needle-valve as shown in the sketch. 3.
- Page 13 In case the engine does not stop. Hold the rotor head, and pinch the fuel line to stop the fuel supply. If it still does not stop, pull off the fuel line from the carburetor. It is necessary to readjust the throttle linkage so that the carburetor rotor is fully closed when the throttle stick and throttle trim on the transmitter are fully pulled Down.
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Page 14: Adjustment
ADJUSTMENT Please observe the following before beginning to The general course of adjustment procedure is make any adjustment. shown in the ADJUSTING CHART and is correct for a fuel containing 20% lubricant and 15-30% High-Speed Needle Valve. Turn this approximately nitromethane. - Page 15 Having provisionally set the idle mixture, the next After about 10 seconds of idling, open the throttle to 'float' the model. lf the transition is smooth, the idle step is to adjust the mixture for hovering flight. mixture is O.K. If the symptoms of either rich or Iean Hover the model and actuate the throttle to observe running are observed, readjust the Idle Mixture response over the medium speed range.
- Page 16 CARBURETOR CLEANLINESS SUBSEQUENT READJUSTMENTS The correct functioning of the carburetor depends on Once the engine has been run-in and the carburetor its small fuel orifices remaining clear. The minute controls properly set up, it should be unnecessary to particles of foreign matter that are present in any fuel alter the mixture settings, except to make minor can easily partially obstruct these orifices and upset changes to the Main (High-Speed) Needle Valve...
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Page 17: Care And Maintenance
CARE AND MAINTENANCE Please pay attention to the matters Install an in-line fuel filter between the tank described below to ensure that your engine and carburetor to prevent foreign matter in serves you well in regard to performance, the tank from entering the carburetor. reliability and long life. -
Page 18: Trouble Shooting
TROUBLE SHOOTING Symptom Engine fails to fire. Corrective action Cause Fuel tank is empty. Fill the tank with fuel and repeat. Fuel not reaching the engine. Priming procedure. Glowplug element is burnt out. Replace glowplug. Glowplug battery discharged Recharge or replace the battery. Clogged fuel filter. - Page 19 Symptom Unstable idle Corrective action Cause Unsuitable glowplug Use suggested glowplug in the instructions. Unsuitable fuel Do not use extremely high nitro or low oil fuel. Silencer is disconnected or is loose Install silencer securely. Symptom Not reaching expected peak r.p.m. Corrective action Cause Set the needle only after warming up.
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Page 21: Carburetor Exploded View
CARBURETOR EXPLODED VIEW C.M3x8 C.M2.6x7 11-4 11-2 11-3 11-1 Type of screw C...Cap Screw CARBURETOR PARTS LIST Description Code No. Description Code No. 29085140 Throttle Lever Assembly 29085950 Fuel Inlet 22826131 Throttle Lever Retaining Screw (2pcs.) 27981900 Needle Valve Assembly 25881200 Carburetor Rotor 27981910... -
Page 22: O.s. Genuine Parts & Accessories
O.S. GENUINE PARTS & ACCESSORIES POWER BOOST Pipe 55 GLOWPLUG (72144000) No.7 M3x35 Cap Screw (2pcs.) (71607100) Spring Washer (2pcs.) No.8 Nipple (1pc) (71608001) No.10 (Former A5) (71605100) LOCK WASHER NON-BUBBLE LONG SOCKET WRENCH SUPER FILTER (10set) WEIGHT WITH PLUG GRIP ( L ) (72403050) (71521000) - Page 23 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 URL : http://www.os-engines.co.jp FAX. (06) 6704-2722 60092230 100903 Copyright 2009 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.