O.S. engine MAX FXi 46 Page 2 Owner'S Instruction Manual Download

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SAFETY INSTRUCTIONS AND WARNINGS
ABOUT YOUR O.S. ENGINE ................................3

FEATURES OF FXi SERIES ENGINE ..................7

BEFORE INSTALLING THE ENGINE....................7

BASIC ENGINE PARTS ........................................8

INSTALLATION OF THE ENGINE ........................8

THROTTLE LINKAGE............................................8

MUFFLER ..............................................................9

FUEL TANK LOCATION ........................................9

GLOW PLUG ......................................................10

FUEL ....................................................................11

PROPELLERS ....................................................12

MIXTURE CONTROLS ........................................12

BEFORE STARTING............................................13

STARTING ..........................................................14

RUNNING-IN (Breaking-in) ..................................15

NEEDLE VALVE ADJUSTMENT DIAGRAM........17

MIXTURE CONTROL VALVE ADJUSTMENT ....19

REALIGNMENT OF MIXTURE CONTROL VALVE ..19

SUBSEQUENT STARTING PROCEDURE..........20

SUBSEQUENT READJUSTMENT ......................20

CARBURETOR CLEANLINESS ..........................21

ENGINE CARE & MAINTENANCE ....................22

O. S. ENGINES LIMITED WARRANTY ..............22

ENGINE EXPLODED VIEW ................................24

ENGINE PARTS LIST ..........................................25

CARBURETOR EXPLODED VIEW ....................26

CARBURETOR PARTS LIST ..............................26

CONTENTS

Summary of Contents for MAX FXi 46

Page 1: ...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 aircraft radio control equipment etc are accessible f...

Page 2: ...LERS 12 MIXTURE CONTROLS 12 BEFORE STARTING 13 STARTING 14 RUNNING IN Breaking in 15 NEEDLE VALVE ADJUSTMENT DIAGRAM 17 MIXTURE CONTROL VALVE ADJUSTMENT 19 REALIGNMENT OF MIXTURE CONTROL VALVE 19 SUBSEQUENT STARTING PROCEDURE 20 SUBSEQUENT READJUSTMENT 20 CARBURETOR CLEANLINESS 21 ENGINE CARE MAINTENANCE 22 O S ENGINES LIMITED WARRANTY 22 ENGINE EXPLODED VIEW 24 ENGINE PARTS LIST 25 CARBURETOR EXP...

Page 3: ...e would respectfully request that these instructions are also passed on to its new owner The advice which follows is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect NOTES These cover the many other possibilities generally less obvious sources of danger but which under certain circumstances may also cause damage or injury WARNINGS T...

Page 4: ...ader pipe in particular may result in a serious burn WARNINGS 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 A weakened or loose propeller may disintegrate or be thrown off and since propeller tip speeds with powerful engines may exceed 600 feet 180 meters per second it will be understood that such a failure cou...

Page 5: ...uld also foul the propeller your hearing Such noise is also likely to cause annoyance to others over a wide area If you remove the glow plug from the engine and check its condition by connecting the battery leads to it do not hold the plug with bare fingers Use an appropriate tool or a folded piece of cloth Install a top quality propeller of the diameter and pitch specified for the engine and airc...

Page 6: ...eller is casually flipped over compression WITHOUT the glow plug battery being reconnected Remember this if you wish to avoid the risk of a painfully rapped knuckle NOTES 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...

Page 7: ...e a perfect running clearance when they reach their intended running temperature Installing the Glow Plug Carefully insert plug with washer finger tight only before final tightening with the correct size plug wrench Connecting the Fuel Tubing Connect the short length of fuel tubing supplied securely between the needle valve outlet and carburetor inlet as shown in the illustration on the next page ...

Page 8: ...make sure that no part of the linkage interferes with the internal structure of the aircraft or wiring etc when the throttle is fully open or fully closed Set the throttle lever linkage so that the throttle rotor is a fully open when the transmitter throttle stick is fully advanced and b fully closed when the THROTTLE LINKAGE INSTALLATION OF THE ENGINE BASIC ENGINE PARTS 8 ...

Page 9: ... silencer can be rotated to any desired position in the following manner 1 Loosen the locknut and assembly screw 2 Set the exhaust outlet at the required position by rotating the rear part of the silencer 3 Re tighten the assembly screw followed by the locknut Note The standard expansion chamber type silencer is quite effective but reduces power to some degree Reminder Model engines generate consi...

Page 10: ...ected the heat retained within the combustion chamber remains sufficient to keep the plug filament glowing thereby continuing to keep the engine running Ignition timing is automatic under reduced load allowing higher RPM the plug becomes hotter and appropriately fires the fuel air charge earlier conversely at reduced RPM the plug becomes cooler and ignition is retarded Glow Plug Life Particularly ...

Page 11: ...For consistent performance and long engine life it is essential to use fuel containing AT LEAST 18 lubricant by volume Some fuels containing coloring additives tend to deteriorate and may adversely affect running qualities Once a satisfactory fuel has been selected and used for a while it may be unwise to needlessly change the brand or type In any engine a change of fuel may cause carbon deposits ...

Page 12: ...thstand the high power output of these engines and a thrown blade can be very dangerous Reminder 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 Two mixture controls are provided on these engines The Needle Valve at rear of engine When set to produce maximum power at full throttle this establishes the basic fuel ...

Page 13: ... large heavy duty 1 5 volt dry cell or preferably a 2 volt rechargeable lead acid cell Warning Very hot Never touch the nichrome wire while the battery is connected 5 Battery Leads These are used to conduct current from the battery to the glow plug Basically two leads with clips are required but for greater convenience twin leads with special glow plug connectors are commercially available 6 Fuel ...

Page 14: ... appropriate propeller and tighten securely 2 To facilitate electric starting install an O S solid aluminum alloy spinner nut for centering the rubber drive insert of the starter Alternatively a good quality spinner enclosing the propeller boss may be used but make sure that it is of precision made and sturdy construction so that the spinner shell cannot loosen when the starter is used Close the t...

Page 15: ...h glow plug removed Then try again VERY IMPORTANT Before being operated at full power i e at full throttle and with the needle valve closed to its optimum setting the engine must be adequately run in otherwise there is a danger of it becoming overheated and damaged All internal combustion engines benefit from extra care when they are run for the first few times known as running in or breaking in T...

Page 16: ...until the fuel tank is empty 3 Re start and adjust the needle valve so that the engine just breaks into two cycle from four cycle operation then make three or four flights avoiding successive nose up flights 4 During subsequent flights the needle valve can be gradually closed to give more power However if the engine shows signs of running too lean the next flight should be set rich After a total o...

Page 17: ...hed exhaust note only will be heard Close the needle valve 10 15 and wait for the change of RPM After the engine RPM increases turn the needle valve another 10 15 and wait for the next change of RPM As the speed of the engine does not instantly change with needle valve readjustment small movements with pauses between are necessary to arrive at the optimum setting Note This diagram is for reference...

Page 18: ...18 IDLING ADJUSTMENT CHART ...

Page 19: ...xhaust smoke and a tendency for the engine to cut out when the throttle is opened In this case turn the Mixture Control Screw counterclockwise 90 to positively enrich the idle mixture then turn the screw clockwise gradually until the engine regains full power cleanly when the throttle is reopened Carry out adjustments patiently until the engine responds quickly and positively to the throttle contr...

Page 20: ...plug and apply the electric starter When the engine starts reopen the throttle and re adjust the needle valve to the optimum setting Note When re starting the engine on the same day provided that atmospheric conditions have not changed significantly it may be practicable to re start the engine on its optimum running setting Once the engine has been run in and the controls properly set up it should...

Page 21: ...orifices remaining clear The 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 O S Super Filters large and small are available as optional extras to deal with this problem One of these filters fitted to the outlet tube inside your refueling container will ...

Page 22: ...into the carburetor as this may cause the 0 ring inside the carburetor to deteriorate These procedures will reduce the risk of starting difficulties and of internal corrosion after a period of storage Your engine is guaranteed to be free of defects in parts and workmanship for a period of two 2 years from the date of purchase when returned for service accompanied by your proof of purchase Crash da...

Page 23: ...07 Along with Your engine and proof of purchase date please enclose a complete written explanation detailing the problems State your name and address clearly For repairs not covered under warranty you must specify whether you wish the charges to be billed C O D or if you wish to be notified of the charges so you can send a check 23 ...

Page 24: ...24 EXPLODED VIEW ...

Page 25: ... front 12 25601200 Crankcase 13 26730040 Crankshaft Ball Bearing rear 14 25602021 Crankshaft 15 25614010 Gasket Set 16 25607010 Cover Plate 17 24007120 Needle Stay 18 25681900 Needle Valve Body Assembly 18 1 22681980 Needle Assembly 18 2 24981837 O ring 18 3 26381501 Set Screw 18 4 26711305 Ratchet Spring 18 5 26582910 Needle Valve Holder 18 6 26582920 Needle Valve Holder Retaining Screw 19 256130...

Page 26: ...22781411 Throttle Lever 1 2 22781420 Throttle Lever Screw 2 27783600 Mixture Control Valve 2 1 22781800 O ring 3 25681200 Carburetor Rotor 4 26781506 Rotor Spring 5 25681100 Carburetor Body 6 25681620 Throttle Stop Screw 7 22681953 Fuel Inlet No 1 8 46215000 Carburetor Gasket 9 25081700 Carburetor Retaining Screw ...

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