OPERATOR`S MANUAL

OPERATOR`S MANUAL
OPERATOR’S MANUAL
96SRX Tareq (Helicopter Engine)
Fig.1
BREAK-IN
SPECIFICATIONS
52mm
Bore
27mm
Stroke
27.5mm
Displacement17.75cc
Weight
580g
Practical rpm
2,000 ~17,000
43.5mm
NEEDLE VALVE ADJUSTMENT
25mm
Idle, Hover and High needle valves all work the same
way. Turning the needles clockwise lean the fuel mixtures and turning them counter clockwise make the fuel
mixtures rich.
Hover Needle
Low Needle
Fuel Filter
Tube (B)
1. Set needles as described in START-UP.
High Needle
2. Start the engine and check idle. Adjust as needed. Check Valve
Factory Set
Do Not Adjust
FEATURES
The 96SRX Tareq is the latest in helicopter engine technology from YS.
● New stroke design for superior operation
● New carburetor design for easier adjustments.
● Factory preset fuel regulator.
CAUTION
Using gear ratios higher than 9.0 to 1 may result in engine damage from overspeed.
GEAR RATIO
You should be using an engine to main rotor gear ratio
of 1-7.5 to 1-8.4. Please check with your helicopter manufacturer to obtain the correct gear ratio.
INSTALLATION
1. The fuel lines should be connected to the fuel tank
as shown in the above figure. Be careful to install the check valve in the correct direction. Since the tank is exposed to high pressures, be sure that all connections are tight to prevent pressures leakage.
2. Since the engine is sensitive to dirt in the fuel, a fuel filter must be used. (We recommend the 6720 fuel filter.)
It is not necessary to mount this engine on a set stand
for break-in. However, the engine should be adjusted
slightly on the rich setting for the first few flights to insure
proper break-in. Always use a good quality fuel which
contain 15 ~30% nitromethane and an oil content of 18
~23% low viscosity oil.
Tube (A)
Tube (C) 3 15/16"(10cm)
3.
Tube(C) should be set exactly at 3 15/16” or (10cm)
between the engine and check valve. DO NOT use any other type of check valve. The check valve is
designed exclusively for the 96SRX.
4. Adjust your throttle linkage and curve using the alignment indentations on the carburetor body located on
the throttle arm side of the carb body. PLEASE NOTE that the hover position is at 40% see FIG 2.
3. Lift helicopter into a hover and check for the correct
rotor RPM recommended by the kit manufacture.
Once this is done take note of the amount of smoke being produced by the muffler. The mixture is correct for hover when there is a steady stream of smoke be ing produced.
4. Land the helicopter for approximately 20~30 seconds.
Lift the helicopter into a hover again taking note of the
transition from idle to hover. If the engine exhibits a
large amount of smoke and the throttle response is
sluggish, you will need to adjust the idle and or the
hover needle leaner to achieved a smooth transition.
If the engine detonates and the smoke is inconsis tent or a small amount is produced, the mixture is too lean.
Fig.2
High speed 100%
START UP
1. Always remove Tube(A) at the check valve first
before fueling. The fuel tank is pressurized and you need to relieve the pressure first. Disconnected Tube(B) at the filter and fill the tank. Reconn-
ect Tube(A) and (B).
2. From the fully closed (clockwise) position, turn the needle valves counter clockwise as follows.
Low speed 0%
STARTING SETTING / OPERATING SETTING
●
●
●
Hover 1.75~2.0 open / 1.50 ~1.75 open
Low 1.25 open / 0.50 ~1.0 open
Full
1.50~2.0 open / 1.0 ~1.50 open
3. Close the throttle to the idle position and connect the glow plug driver. The engine is now ready for starting.
Hover 40%
5. The high speed needle refines the fuel mixture for
forward flights without affecting the hovering adjust- ment. After the engine is started and warmed up, lift-
off into a hover and check that the engine is running smooth with a good trail of smoke. If everything is fine,
open the throttle and enter forward flight. Take note of the amount of smoke like we did in a hover adjustment.
It is correct when you see a noticeable steady smoke trail. Adjust the high-speed needle valve to obtain slightly rich but consistent setting.
STOPPING THE ENGINE
1. Fully close the throttle barrel to stop the engine.
2. As soon as the engine stops running, be sure that a
fuel line clamp is used in Tube(B) to prevent fuel from
flowing into the engine.
3. On the final flight of the day, the fuel line clamp
should be used to stop the engine in order to prevent
rust and corrosion.
FUEL AND GLOW PLUG
Fuel _ Nitro 15-30% Oil 15-25%
Glow Plug _ YS #2 Enya #3 OS #8
IMPORTANT!
Silicone rubber is used in many parts of the YS engine.
Use only glow fuel of methanol for cleaning. Gasoline
and other volatile solutions will damage silicone if used.
WARRANTY
Strict quality control is implemented by our factory in all
phases, from parts manufacturing to final assembly.
If performance deteriorates or a part fails due to a manufacturing error, YS engine will repair or replace the engine at no charge in the period of one year from date of
purchase. Warranty does not cover normal maintenance.
Should the engine be modified, incorrectly assembled or
abused, there will be a normal charge for parts and labor.
NO.
PART#
DESCRIPTION
QTY
1
R7001
Crankcase
1
2
R8002
Cylinder Head
1
3
S9103
Head Gasket
1
4
S5104
Head Screws
6
5
R8005
Cylinder Liner
1
6
R7006
Piston
1
7
S9107
Piston Ring
1
8
S7108
Wrist Pin
1
9
S5208
Wrist Pin Retainer
2
10
S5110
Con Rod
1
11
R8011
Crankshaft
1
12
R6211
Front Bearing
1
13
S9113
Rear Bearing
1
14
S1014
Drive Washer Spacer
1
15
R6217
Propeller Nut
1
16
R8016
Back Plate
1
17
S9117
Back Plate O ring
1
18
R6120
Back Plate Screw
4
19
S3019
Carburetor Body
1
20
S5120
Carburetor Gasket
1
21
S3021
Throttle Barrel
1
22
R6124
Throttle Barrel Retainer
1
23
S4125
Hover Needle Valve
1
24
F1546
Hover Needle O Ring
1
25
F1555
Hover Needle Seat
1
26
F1556
Hover Needle Seat O Ring
2
27
S5128
Needle Detent
2
28
S8130
High Speed Needle
1
29
F1546
High Speed Needle O Ring
1
30
S5131
Low Speed Needle
1
31
S8133
Low Speed Needle O Ring
1
32
F1260S
Throttle Arm
1
33
S7132
Carburetor Screws
2
34
S5135
Carburetor Subplate
1
35
S7134
Regulator Subplate
1
36
S8138A
Regulator Assy.
1
37
S7136
Diaphragm
1
38
S7140
Regulator gasket
1
39
S7139
Regulator Screws
2
40
S7144
Check Valve
1
S9143
Gasket Set
S9119S
Carburetor Assy.
S9146
O ring set
R8005S
Piston / Ring / Liner Set
S4125S
Needle Valve Assy.
4
2
7
3
22
9
8
9
6
32
21
26
19
25
20
27
34
30
27
10
24
23
29
28
18
5
31
16
17
11
13
1
12
15
40
14
33
38
35
37
36
2016 MAR
39
http:// www.yspower.co.jp
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