User manual OS ENGINES MAX-50SX

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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 2-6 of this booklet and to strictly adhere to the advice contained therein. q Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine. q 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 for checking at the same time. q CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. ENGINE FEATURES OF FX SERIES ENGINES, BEFORE INSTALLING THE ENGINE BASIC ENGINE PARTS NEEDLE-VALVE LOCATION INSTALLATION OF THE ENGINE THROTTLE LINKAGE, SILENCER FUEL TANK LOCATION GLOWPLUG FUEL, PROPELLERS MIXTURE CONTROLS BEFORE STARTING STARTING 2~6 7 8 8~9 10 11~12 12 13 14~15 15 16~17 17~18 19~21 22 23 24 25 26~33 34~35 36~37 38~41 42 RUNNING-IN (Breaking-in) IDLING ADJUSTMENT CHART MIXTURE CONTROL VALVE ADJUSTMENT, REALIGNMENT OF MIXTURE CONTROL VALVE SUBSEQUENT STARTING PROCEDURE SUBSEQUENT READJUSTMENT CARBURETOR CLEANLINESS, ENGINE CARE AND MAINTENANCE ENGINE EXPLODED VIEWS & ENGINE PARTS LISTS CARBURETOR EXPLODED VIEWS & PARTS LISTS GENUINE O. S. [. . . ] Basically, two leads, with clips, are required, but, for greater convenience, twin leads with special glowplug connectors, as shown on the right, are commercially available. 16 6 Fuel tank For installation in the model, a 300cc (10. 6oz. ) for 50SX and 40, 46FX, a 350cc (12oz. ) for 61FX, a 450cc (15. 8oz. ) for 91FX tank, is suggested. 7 Fuel bottle or pump For filling the fuel tank, a simple, polyethylene "squeeze" bottle, with a suitable spout, is all that is required. Alternatively, one of the purpose-made manual or electric fuel pumps may be used to transfer fuel directly from your fuel container to the fuel tank. 8 Electric starter and starter battery An electric starter is recommended for starting. 12V Battery 10 Silicone tubing This is required for the connection between the fuel tank and engine. 11 Plug wrench Used for tightening glowplug. long plug wrench is available as an optional accessory. For tightening glowplug Fuel bulb Fuel pumps Electric Manual Starter STARTING 1. Install appropriate propeller and tighten securely. 2. To facilitate electric starting, Install an O. S. solid aluminium 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 throttle. 9 Fuel can filter Fit a filter to the outlet tube of your refuelling container to prevent entry of foreign matter into the fuel tank. Fuel Can Filter 17 3. Do not allow fuel to overflow into the silencer, otherwise the engine may become flooded and difficult to start. (Do not overtighten. ) Now open the needle-valve counterclockwise to the starting setting:· 112~2 turns for 50SX, 40, 46, 61FX · 2~2 12 turns for 91FX · 3~4 turns for 61FX when a tuned silencer is used. Mark Turn needle-valve clockwise to close (for leaner mixture) Turn needle-valve counter-clockwise Close to open (for richer mixture) Open 6. Connect battery leads to glowplug. 7. Bring electric starter into contact with spinner-nut or spinner and depress starter switch for one or two seconds. When the engine starts, withdraw the starter immediately. Attention : Do not choke the carburettor air intake when applying the starter. This could cause an excessive amount of fuel to be drawn into the cylinder which may initiate an hydraulic lock and damage the engine. If the engine does not start within 10 repeat applications of the starter, remove the glow-plug, check that it glows brightly and that the cylinder is not flooded with fuel. (To eject excess fuel, close needlevalve and apply starter with glowplug removed. ) Then try again. 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. 5. [. . . ] Note: Do not inject after-run oil into the carburetor as this may cause the O-ring inside the carburettor to deteriorate. These procedures will reduce the risk of starting difficulties and of internal corrosion after a period of storage. 25 EXPLODED VIEW (50SX) C. M315 1 o 2 3 5 4 6 7 8 i-9 9 S. M33 C. M2. 618 u 26 r we q -= 0 C. M38 t i-1 i-10 y q-1 i-6 i-7 i-8 i-3 i-5 i i-2 i-4 Type of screw C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw ENGINEN PARTS LIST (50SX) No. 1 2 3 4 5 6 7 8 9 0 = q q-1 w e r t y u i i-1 i-2 i-3 i-4 i-5 i-6 i-7 i-8 i-9 i-10 o Code No. Description Cylinder Head Cylinder Liner Piston Ring Piston Piston Pin Piston Pin Retainers Connecting Rod Carburetor (Type 40B) Carburetor Spacer Carburetor Retainer Propeller Nut Propeller Washer Drive Hub Woodruff Key Thrust Washer Crankshaft Ball Bearing (F) Crankcase Crankshaft Ball Bearing (R) Crankshaft Gasket Set Cover Plate Assembly Cover Plate Body Needle "O"Ring Set Screw Needle Valve Holder Assembly Needle Valve Holder Ratchet Spring Fuel Inlet Plug Screw Fuel Outlet Screw Set Glow Plug No. 8 873 Silencer Assembly Pressure Fitting Assembly Screw Retaining Screw (2pcs. ) 25204010 25203100 25303400 25203200 25206000 25217000 25205000 25681010 25281140 23981700 23210007 23209003 27708010 27708200 46120000 26731002 25201000 26730005 25202010 25214000 25207010 25207100 24081970 24981837 26381501 46181940 46181941 26711305 46181950 22881300 22681953 25613000 71608001 25425000 22681957 25425310 25425400 27 Specifications are subject to alteration for improvement without notice. EXPLODED VIEW (40, 46FX) C. M3X15 1 2 4 t 28 6 6-1 6-2 0 9 7 8 - 3 5 e q C. M3X8 S. M3X3 r-2 = r-1 N. +M3. 5X6 r-7 r-4 r-6 r-3 r-5 r w Type of screw C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw ENGINEN PARTS LIST (40, 46FX) No. 1 2 3 4 5 6 6-1 6-2 7 8 9 0 = q w e r r-1 r-2 r-3 r-4 r-5 r-6 r-7 t Description Cylinder Head Cylinder & Piston Assembly Piston Pin Piston Pin Retainer Connecting Rod Carburetor ( Type 40B) Carburetor Rubber Gasket Carburetor Retaining Screw ( 2pcs. ) Propeller Nut Propeller Hub Drive Hub Thrust Washer Crankshaft Ball Bearing (F) Crankcase Crankshaft Ball Bearing (R) Crankshaft Gasket Set Cover Plate Assembly Cover Plate Body Fuel Outlet Needle "O"Ring Code No. 40FX 25604000 25603000 25406000 24817100 25305002 25681010 46215000 25081700 23210007 23209003 25608000 46120000 26731002 25601000 26730005 25602020 25614000 25607000 25607100 22681953 22681980 24981837 26381501 27381940 26711305 25613000 25425000 22681957 25425310 25425400 46FX 25604010 25603010 24806301 24817100 25305002 25681010 46215000 25081700 23210007 23209003 25608000 46120000 26731002 25601100 26730005 25602020 25614010 25607000 25607100 22681953 22681980 24981837 26381501 27381940 26711305 25613000 25425000 22681957 25425310 25425400 29 Set Screw Needle Valve Holder Assembly Ratchet Spring Screw Set 873 Silencer Pressure Fitting Assembly Screw Retaining Screw ( 2pcs. ) Specifications are subject to alteration for improvement without notice. EXPLODED VIEW (61FX) C. M315 1 t 2 4 e 30 6-1 6 6-2 = 0 9 8 7 Type of screw 3 5 q r-5 r-3 r-4 C. M3. 58 C. M38 N. M3. 56 r--10 r-11 r-1 r-9 r-2 w r r-7 r-8 r-6 - C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw ENGINEN PARTS LIST (61FX) No. Code No. Description Cylinder Head Cylinder & Piston Assembly Piston Pin Piston Pin Retainer Connecting Rod Carburetor (Type 60C) Carburetor Rubber Gasket Carburetor Retaining Screw Propeller Nut Propeller Washer Drive Hub Thrust Washer Crankshaft Ball Bearing (F) Crankcase Crankshaft Ball Bearing (R) Crankshaft Gasket Set Cover Plate Assembly Cover Plate Body Fuel Outlet Fuel Inlet Assembly Fuel Inlet Inlet Holder Needle "O"Ring Set Screw Needle Valve Holder Assembly "O"Ring Ratchet Spring Screw Set Glow Plug No. 8 E-4010 Silencer Pressure Fitting Assembly Screw Retaining Screw (2pcs. ) 1 2 3 4 5 6 6-1 6-2 7 8 9 0 = q w e r r-1 r-2 r-3 r-4 r-5 r-6 r-7 r-8 r-9 r-10 r-11 t 27754000 27753000 26606008 27917000 26025000 27783000 46215000 25081700 45010002 28009002 27758000 29320000 27731000 27751000 29030001 27752000 27914000 27757000 27757100 22681953 27757010 46181950 27757030 22681980 24981837 26381501 27783940 21281800 26711305 27913000 71608001 26028000 22681953 26028100 26625210 31 Specifications are subject to alteration for improvement without notice. EXPLODED VIEW (91FXRING) C. M315 y 2 y 3 6 4 5 7 8-1 8 8-2 N. M3. 56 32 = 9 0 Type of screw r w q t-9 C. M3. 510 S. M33 0-1 e t-6 t-8 t-7 t-3 t-4 t-1 t-10 t-2 t-5 t C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw ENGINE PARTS LIST (91FX RING) No. 1 2 3 4 5 6 7 8 8-1 8-2 9 0 0-1 = q w e r t t-1 t-2 t-3 t-4 t-5 t-6 t-7 t-8 t-9 t-10 y Code No. Description Cylinder Head Cylinder Liner Piston Ring Piston Piston Pin Piston Pin Retainers (2) Connecting Rod Carburetor (Type 60F) Carburetor Gasket Carburetor Retaining Screw (2pcs. ) Propeller Lock Nut Set Drive Hub Woodruff Key Thrust Washer Crankshaft Ball Bearing (F) Crankcase Crankshaft Ball Bearing (R) Crankshaft Gasket Set Cover Plate Assembly Cover Plate Body Needle "O"Ring Set Screw Needle Valve Holder Assembly Needle Valve Holder Ratchet Spring Fuel Inlet Plug Screw Fuel Outlet Screw Set Glow Plug No. 8 E-4020 Silencer Assembly Assembly Screw Retaining Screw (2pcs. ) Pressure Fitting Needle Valve Extension Cable Set 29504000 29503100 29503400 29053200 45406000 27917000 29505000 29581000 29015019 25081700 45910100 29508000 29008219 46120000 26731002 29501000 29030001 29502000 29514000 29507000 29507100 24081970 24981837 26381501 46181940 46181941 26711305 46181950 22881950 22681953 29513000 71608001 29525000 29525100 26625210 22681957 72200080 33 Specifications are subject to alteration for improvement without notice. 1 1-11-2 2 2-1 CARBURETOR 40B (50SX, 40, 46FX) 3 4 5 7 6 1 1-2 1-1 2 2-1 CARBURETOR 60C (61FX) 3 4 5 7 N. +M3. 5X6 6 N. +M3. 5X6 8 9 Type of screw C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw No. 1 1-1 1-2 2 2-1 3 4 5 6 7 8 9 8 9 No. 1 1-1 1-2 2 2-1 3 4 5 6 7 8 9 Code No. 22781401 22781420 22781411 27783600 22781800 25681200 26781506 25681100 25681620 22681953 46215000 25081700 Description Throttle Lever Assembly Throttle Lever Fixing Screw Throttle Lever Mixture Control Valve "O"Ring Carburettor Rotor Rotor Spring Carburettor Body Throttle Stop Screw (W / Spring) Fuel Inlet (W / Washer) Carburettor Gasket Carburettor Fixing Screw Code No. 22781401 22781411 22781420 27783600 22781800 27783200 26781506 27783100 25681620 22681953 46215000 25081700 Description Throttle Lever Assembly Throttle Lever Throttle Lever Fixing Screw Mixture Control Valve "O"Ring Carburettor Rotor Rotor Spring Carburettor Body Throttle Stop Screw (W / Spring) Fuel Inlet (W / Washer) Carburetor Gasket Carburetor Retaining Screw 34 N. +M36 CARBURETOR 60F (91FXRING) 4 5 1 2 3-1 3-2 3 N. M3. 56 6 8 C. . . Cap Screw F. . . Flat Head Screw N. . . Round Head Screw S. . . Set Screw No. 1 2 3 3-1 3-2 4 5 6 7 8 Type of screw 7 Code No. [. . . ]

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