O.S. engine FS-70 Ultimate Owner'S Instruction Manual Download Page 13

Page: 13 / 14

Dimensions(mm)

Specifications

THREE VIEW DRAWING

Displacement
Bore
Stroke
PracticalR.P.M.
Output
Weight

11.45cc / 0.698cu.in.
27.7mm / 1.091in.
19.0mm / 0.748in.
2.000-15.000r.p.m.
1.2ps / 11.000r.p.m.
455g / 16.0oz.

JAPAN

35.4

59.5

34.5

24.1

50.2

29.6

35.1

87.4

105.4

49.5

58.9

UNF1/4-28

4- 3.7

26.7

39.5

142

25.6

(without Locknut, Drive Hub, Woodruff Key,

F-4020(U) Silencer Assembly)

527.3g / 18.61oz.

51g / 1.8oz.

(With F-4020(U) Silencer Assembly)

F-4020(U) Silencer Assembly

MEMO

Summary of Contents for FS-70 Ultimate

Page 1: ...control equipment etc are accessible for checking at the same time 1 2 4 5 6 7 8 9 10 11 12 13 14 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE INTRODUCTION INSTALLING THE GLOWPLUG INSTALLATION FUEL TANK LINES EXHAUST HEADER PIPE AND SILENCER THROTTLE LINKAGE NEEDLE VALVE EXTENSION CARE OF FUEL PUMP AND REGULATOR PROPELLERS GLOWPLUGS FUEL PROPELLER AND SPINNER ATTACHMENT TYPE 60U CARBURET...

Page 2: ...your engine in an enclosed space Model engines like automobile 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 Contact with the muffler silencer cylinder head or exhaust header pipe in particular may result in a serious burn 3 NOTES This engine was designed for model aircra...

Page 3: ... 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 casually flipped over compression WITHOUT the glowplug battery being reconnected Remember this if you wish to avoid the risk of a painfully rapped knuckle NOTES 5 INTRODUCTION Rocker Cover Cylinder Head Push Rod Cover Drive Hub Prope...

Page 4: ... nut firmly down onto first nut Tighten this nut first Steel washer 3mm steel nuts 3mm steel screw Spring washer or lock washer 15mm min 15mm min Hardwood such as cherry or maple Spring washer 3mm steel Allen screw 7 FUEL TANK LINES 10 15mm A fuel tank of approximately 300cc capacity is suggested This allows up to 12 13 minutes flying time dependent upon the type of fuel used the size of the prope...

Page 5: ...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 Install these in the following sequence Screw the header pipe into the cylinder head until it bottoms then unscrew sufficiently to achieve the desired exhaust angle and tighten the locknut securely with a 14mm w...

Page 6: ...small percentage 5 30 of nitromethane for improved flexibility and power The carburetor is adjusted at the factory for a fuel containing 20 lubricant and 15 nitromethane Some commercial fuels also contain coloring additives as an aid to fuel level visibility In some cases these additives have indicated slightly negative effects on performance We would suggest that you use such fuels only if you ar...

Page 7: ... fast enough to cause the fuel pump to prime the cylinder automatically Starting procedure is as follows Check that the current to the glowplug is switched off Check that the polarity of the starter battery leads rotates the engine counter clockwise when viewed from the front Open the needle valve approx 2 turns from the fully closed position and temporarily set the throttle in the fully open posi...

Page 8: ...ightly rich 30 45 from the highest r p m setting Close the throttle to the idle position Allow the engine to idle for about 5 seconds then reopen the throttle The engine should accelerate smoothly back to full speed If instead the engine responds sluggishly and emits an excess of white smoke from the exhaust the idle mixture is too rich Turn the mixture control screw approx 45 clockwise to lean th...

Page 9: ...ount of running time a loss of power is detected or if the engine has been disassembled for repair these clearances should be checked and reset as necessary VALVE ADJUSTING The kit comes in a plastic case and includes Code No 72200060 Feeler gauge 0 1mm Hex key 1 5mm Wrench 5mm 17 Re tighten locknut while holding adjusting screw stationary Fig 5 4 Hold at the screw head Fig 5 Tighten Locknut Remov...

Page 10: ...le valve assembly from the carburetor and remove any foreign matter that has accumulated in this area See photo If these precautions are neglected restriction of fuel flow may cause the engine to cut out or the fuel air mixture to become too lean causing the engine to overheat The use of modern high performance alcohol based model engine fuels while promoting cooler running improved anti detonatio...

Page 11: ... Head Screw N Round Head Screw S Set Screw C M3x12 C M3x16 C M2 6x8 C M2 6x8 F M2 6x6 2 30 2 3 3 1 3 2 4 4 1 4 2 5 5 4 5 3 5 2 5 1 6 7 8 9 1 10 11 12 13 14 15 17 18 19 20 21 22 30 1 30 2 23 24 25 26 6 1 6 2 6 3 6 4 28 29 C M3 5x20 16 24 27 30 31 32 34 33 C M2 6x18 18 1 18 2 18 3 ...

Page 12: ...10 11 12 13 14 15 16 17 44704200 44714300 45961400 45961410 45761600 44753000 44753100 45761200 44750000 44750100 45960210 45960310 45960400 44751000 44751100 45960210 45960310 45960400 44704100 44704000 45515000 44769400 44781000 44714100 29503400 44703200 45906000 44705000 44703100 18 18 1 18 2 18 3 19 20 21 22 23 24 25 26 27 28 29 30 30 1 30 2 31 32 33 34 44782000 44782160 45771000 22681957 447...

Page 13: ... 0mm 0 748in 2 000 15 000r p m 1 2ps 11 000r p m 455g 16 0oz JAPAN JAPAN 54 35 4 59 5 34 5 24 1 50 2 29 6 35 1 87 4 18 105 4 20 49 5 45 58 9 UNF1 4 28 4 3 7 92 26 7 45 20 39 5 142 25 6 without Locknut Drive Hub Woodruff Key F 4020 U Silencer Assembly 527 3g 18 61oz 51g 1 8oz With F 4020 U Silencer Assembly F 4020 U Silencer Assembly 24 MEMO ...

Page 14: ...ed Printed in Japan TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan 60091400 090304 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 ...

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