O.S. engine max-65ax, Instruction Manual

Page 1: ...ing at the same time 1 2 6 7 8 9 10 20 21 22 27 30 33 15 16 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE ENGINE CONSTRUCTION NOTES WHEN APPLYING AN ELECTTRIC STARTER ABOUT THE ENGINE BASIC ENGINE PARTS BEFORE STARTING INSTALLATION INSTALLATION OF THE STANDARD ACCESSORIES FUEL TANK LOCATION MIXTURE CONTROLS GLOWPLUG STARTING CONTENTS RUNNING IN IDLING ADJUSTMENT CHART MIXTURE CONTROL VALV...

Page 2: ...sonous 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 Never operate your engine in an en closed space Model engines like auto mobile engines exhaust deadly carbon monoxide Run your engine only in an open area Model engines generate considerable heat Do not touch any part of your engine until it has cooled C...

Page 3: ...s check the tightness of the propeller nut and retighten it if necessary before restarting the engine Also check the tightness of all the screws and nuts before restarting the engine If you install a spinner make sure that it is a precision made product and that the slots for the propeller blades do not cut into the blade roots and weaken them Preferably use an electric starter The wearing of safe...

Page 4: ...eparing your model for flight If you have to carry the model to the take off point with the engine running be especially cautious Keep the propeller pointed away from you and walk well clear of spectators Warning Immediately after a glowplug ignition engine has been run and is still warm conditions sometimes exist whereby it is just possible for the engine to abruptly restart if the propeller is c...

Page 5: ...nto your eyes 9 STANDARD ACCESSORIES Glow Plug No 8 supplied with the engine Needle Valve Extension Cable Set E 4010A Silencer Assembly Silencer Retaining Screw M4x40 2pcs ABOUT THE ENGINE This is a high performance two stroke engine designed for sport and aerobatic models Crankcase and cylinder head are of aero shape design which has the advantage of light weight and compact size The new 61D carb...

Page 6: ...n in the table may be used but remember that the propeller noise will increase due to higher rpm or if a larger diameter lower pitched prop is used Never touch or allow any object to come into contact with the rotating propeller and do not crouch over the engine when it is running Reminder Warning Make sure that the propeller is well balanced An unbalanced propeller and or spinner can cause seriou...

Page 7: ...yone else to smoke near to it Reminder A fuel tank of approximately 350cc capacity is suggested This allows around 10 12 minutes flying time dependent upon the type of fuel used the size of propeller and on the amount of full throttle to part throttle operation throughout the flight Fuel Tank GLOW PLUG O S No 8 glowplug is supplied with the engine 13 S GLOWPLUG IGNITER Commercialy available handy ...

Page 8: ...avy and rigid as possible engine mounting for highest performance and safe running Conventional wooden mounting beams should be of rigid hardwood and of at least 15mm or 5 8 in square section Use at least 3mm steel screws such as Allen type with locknuts for bolting the engine to the bearers INSTALLATION CORRECT Top surfaces are in the same plane INCORRECT Front view Side view Re align the surface...

Page 9: ...and closed Connect the linkage so that the throttle is fully closed when the transmitter throttle stick and its trim lever are at their lowest settings and fully open when the throttle stick is in its fully open position Carefully align the appropriate holes in the throttle arm and servo horn so that they move symmetrically and smoothly through their full travel 17 INSTALLING THE GLOWPLUG Install ...

Page 10: ...erable heat Do not touch any part of your engine until it has cooled Contact with the muffler silencer cylinder head or exhaust header pipe in particular may result in a serious burn Keep your hands and face away from exhaust gas or you will suffer a burn Reminder 1 2 3 Assembly screw Cone baffle Turn to requlred position Exhaust outlet Locknut Exhaust pressure nipple E 4010A Silencer O Ring 19 No...

Page 11: ...or fuel tubing Be sure to use a pressurized fuel system by connecting the muffler pressure nipple to the vent pipe of the fuel tank The Fuel line pickup weight should be 10mm away from the back of the tank Position the fuel tank so that approximately 1 3 of the tank height is above the center line of the needlevalve 21 Attention to tank height Plug commercially available For carburetor Approx 10mm...

Page 12: ... high performance engines glowplugs must be regarded as expendable items However plug life can be extended and engine performance maintained by careful use i e Install a plug suitable for the engine Use fuel containing a moderate percentage of nitromethane unless more is essential for racing events Do not run the engine too lean and do not leave the battery connected while adjusting the needle Wit...

Page 13: ...k the tightness of screws and nuts especially engine mounting and moving parts e g throttle lever 25 Connect battery leads to glowplug Check that the needle valve is closed Do not overtighten Now open the needle valve counter clockwise 2 turns to the starting setting 3 4 Open the throttle approx one quarter This is to avoid unnecessarily high r p m when the engine starts Turn needle valve clockwis...

Page 14: ... is disconnected open the needle valve to the point where the engine does not stop Run the engine for one minute with the throttle fully open but with the needle valve adjusted for rich slow four cycle operation RUNNING IN Breaking in Now close the needle valve until the engine speeds up to two cycle operation and allow it to run for about 10 seconds then reopen the needle valve to bring the engin...

Page 15: ...essary to arrive at the optimum setting Optimum needle setting 1 Optimum needle setting 2 Slowly advance the throttle to its fully open position then gradually close the needle valve until the exhaust note begins to change 4 cycle to 2 cycle 29 20 45 degrees Needle valve adjustment diagram This diagram is for reference purposes only Actual needle positions may differ from those shown Note Practica...

Page 16: ...r about five seconds then open the throttle fully If at this point the engine is slow to pick up and produces an excess of exhaust smoke the mixture is too rich Correct this condition by turning the Mixture Control Screw clockwise 15 30 degrees If the mixture is excessively rich engine rpm will become unstable opening the throttle will produce a great deal of smoke and rpm may drop suddenly or the...

Page 17: ...run in and the controls properly set up it should be unnecessary to alter the mixture settings except to make minor adjustments to the Needle Valve occasionally to take account of variations in climatic conditions The use of a different fuel however particularly one containing more or less nitromethane and or a different type or proportion of lubricating oil is likely to call for some readjustment...

Page 18: ...tive action 2 3 1 2 3 3 3 3 2 Voltage too high or too low Re check and readjust referring to BEFORE STARTING Continue applying an electric starter If the engine dos not start after more than 4 tries disconnect the current to the glowplug and leave for a few minutes then re energize plug and apply starter If the engine still does not start remove glowplug and pump out excess fuel by applying the st...

Page 19: ...ute to the problem 37 Do not close the needlevalve and mixture control valve too far as this will cause a lean setting and over heating of the engine This can in turn create nitromethane oxide leading to internal rusting of the engine Always adjust the needlevalve slightly on the rich side of peak rpm Do not leave unused fuel in the engine at the conclusion of a day s flying Accepted practice is t...

Page 20: ...ston Pin Piston Pin Retainer 2pcs Connecting Rod Carburetor Complete Type 61D Propeller Nut Propeller Washer Drive Hub Thrust Washer Crankshaft Ball Bearing F Crankcase Crankshaft Ball Bearing R Crankshaft Gasket Set Cover Plate Glow Plug No 8 Needle Valve Extension Cable Set E 4010A Silencer Assembly Assembly Screw O Ring Pressure Nipple No 7 Silencer Retaining Screw C M4x40 2pcs 1 1 1 2 3 4 5 6 ...

Page 21: ...er Retaining Screw Carburetor Rotor Mixture Control Valve Assembly O Ring L 2pcs O Ring S 2pcs Carburetor Body Roter Guide Screw Fuel Inlet No 1 Needle valve Assembly Needle Assembly O Ring 2pcs Set Screw Needle valve Holder Assembly Ratchet Spring Carburetor Rubber Gasket Carburetor Retaining Screw 1 1 1 2 3 3 1 3 2 4 5 6 7 7 1 7 2 7 3 7 4 7 5 8 9 22081408 22081313 26981200 25781600 46066319 2278...

Page 22: ...8001 No 8 5 16 24 26625340 26625500 14 5mm 42 0mm 35 0mm 42 0mm Width Screw hole pitch Long SILENCER E 4050 27426000 43 71521000 72403050 79870030 M3 M3 55500002 The specifications are subject to alteration for improvement without notice SUPER FILTER LONG SOCKET WRENCH WITH PLUG GRIP LOCK WASHER 10sets BLIND NUT L 79870040 M4 M4 55500003 71531000 71531010 NON BUBBLE WEIGHT NON BUBBLE WEIGHT S ...

Page 23: ...in 23 5 mm 0 925 in 2 500 12 000 r p m 1 75 hp 16 000 r p m 497 g 17 53 oz 101 3 UNF5 16 24 125 31 7 66 6 26 7 52 40 60 28 8 26 26 24 42 104 4 25 37 7 114 6 78 5 41 7 C Copyright 2010 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan 60092410 111003 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 ...