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22

STARTING

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Be  sure  to  use  a  muffler  pressurized  fuel  feed.  Use 
the  same  fuel  as  you  intend  to  employ  for  actual 
operation of your model.

1.

2.

Opening and closing of the Needle-Valve

Turn  the  needle  clockwise  to 
close  the  needle-valve,  and  turn 
the  needle  counter-clockwise  to 
open  the  needle-valve  as  shown 
in the sketch.

High Speed needle-valve:

exactly  two  turns  open  from  the  fully  closed 
position.(

Note:

  If  a  different  muffler  is  used,  this 

setting may require readjustment)

Idle Mixture Control Screw:

at  basic  position  when  the  engine  leaves  the 
factory.

4.

5.

6.

Checking the rotating direction of the starter

Make sure that the starter rotates 
to  the  direction  shown  in  the 
sketch.  If  the  direction  is  reverse, 
reverse the leads on battery.

Inserting the starter shaft

Insert the starting shaft into the 
shaft cup securely.

Priming

Without  energizing  the  glowplug, 
open  the  throttle  a  little  from  the 
idling  position.  Turn  the  engine 
over using the starter until the fuel 
is seen to reach carburetor.

3.

Preparation of the starter

Install  the  starting  shaft  to  the 
starter securely. 
Improper installation will allow the 
shaft  to  swing  creating  a 
dangerous situation.

23

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.

Stopping the engine

Fully pull down the throttle trim on the transmitter.

Starting

Connect the battery to the glowplug and start the 
engine by applying the starter. When started, switch 
off the starter and withdraw the starting shaft after 
making sure the rotation of the starter shaft stops.

Preparation of starting

Make  sure  that  the  transmitter 
throttle  stick  is  at  the  fully  closed 
position and the throttle trim at center 
position, and make sure that idle-up 
switch on the transmitter is off. Hold 
the rotor head by hand so that rotor 
cannot rotate when the engine is Started. Also, steady 
the model with a foot on the landing gear skid.

7.

8.

9.

NOTE:
If  the  throttle  response  is  poor  or  the  engine 
stops  due  to  a  temporarily  over-rich  mixture  im-
mediately  after  the  engine  is  started,  pinch  the 
fuel  line  for  one  or  two  seconds  until  the  engine 
r.p.m. increase and the engine runs steadily. 

Reminder!

Never  touch,  or  allow  any  object  to 
come  into  contact  with,  the  rotating 
rotor.

Содержание MAX-91SX-HRING C Spec PS VIPER

Страница 1: ...LE SERVO CARE AND MAINTENANCE EXPLODED VIEW PARTS LIST O S GENUINE PARTS ACCESSORIES THREE VIEW DRAWING MEMO 7 8 13 16 30 10 36 22 24 24 27 29 32 35 37 38 It is of vital importance before attempting t...

Страница 2: ...many other possibilities generally less obvious sources of danger but which under certain circumstances may also cause damage or injury 3 WARNINGS Never touch or allow any object to come into contact...

Страница 3: ...head down securely Take care that the glow plug clip or battery leads do not come into contact with rotating parts Adjust the throttle linkage so that the engine stops when the throttle stick and tri...

Страница 4: ...oove onto the connecting rod BDC position Rotate the crankshaft so that the connecting rod comes to this position 7 Note on installing the engine Note on heating the glow plug Cooling fan cover from s...

Страница 5: ...h torque type starter DO NOT however confuse tightness with the symptoms of hydraulic lock caused by an excess of fuel within the cylinder often the result of over priming Attempting to force the engi...

Страница 6: ...the under surfaces of the engine s mounting lugs are in contact with the engine mount 11 ABOUT THE PUMP SYSTEM Please understand the pump construction before piping Pump functions in accordance with t...

Страница 7: ...el in the pump Stop the fuel flow to the pump with the stopper and run the engine at idling to use out the fuel in the pump After stopping the engine rotate the engine by electric starter to eject fue...

Страница 8: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Страница 9: ...and connections carefully for any cracks on the tubes and loose connections as the engine runs ejecting excess fuel 17 4 Glowplug battery The power source for heating the glowplug may be either a lar...

Страница 10: ...is disconnected 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 re...

Страница 11: ...Ixture Control Screw Lean With a model helicopter adjustments may vary due to various factors such as climatic conditions fuel muffler main rotor weight of the model gear ratio etc 89 degrees When the...

Страница 12: ...ating a dangerous situation 23 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...

Страница 13: ...15 30 nitromethane Bear in mind that fuels containing relatively large percentages of power boosting nitromethane operate at richer mixture settings than are needed for mild fuels and will therefore r...

Страница 14: ...se at medium r p m e g hovering speeds is most important since this is a power range widely used in helicopter flight The optimum fuel air nixture strength at medium speeds is dependent on obtaining b...

Страница 15: ...mostly accumulate here SUBSEQUENT READJUSTMENTS Once the engine has been run in and the carburetor controls properly set up it should be unnecessary to alter the mixture settings except to make minor...

Страница 16: ...re Close the High Speed Needle Valve Turn clockwise Land the model Idle for approx 10 seconds then reopen throttle to observe transition Float the model Idling OK Lean mixture Rich mixture High Speed...

Страница 17: ...ide your refueling container will prevent the entry of foreign material into the fuel tank It is also recommended that a good in line filter be installed between the tank and carburetor 1 Finally inje...

Страница 18: ......

Страница 19: ...881810 27881800 27881820 45581820 29084100 27881330 27681340 27081900 27981910 24981837 46181940 46181941 26711305 46181950 Ratchet Spring Needle Needle Valve Assembly Fuel Inlet Rotor Guide Screw O R...

Страница 20: ...MP 10set Cap Screw Set M2 6x5 10pcs set 79871010 M3 5x10 79871070 7091 71530500 For 70SZ H 91SX H Needle Adjusting Screw 5pcs M2 6x5 41621100 37 THREE VIEW DRAWING Displacement Bore Stroke Practical R...

Страница 21: ...d in Japan 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 U N E Q U A LLEDQ U A LIT Y P R E C IS IO N P E R F O R M A N C...

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