Technical Data - Yamabiko ECHO PB-2520 Service Manual

PB-2520
EB252

1-2 Technical data

Engine
Compression pressure
Ignition system
Spark plug gap
Spark test Tester gap w/ spark plug
Tester gap w/o spark plug
Secondary coil resistance
Pole shoe air gaps
Ignition timing
Carburetor
Test Pressure, minimum
Metering lever height
Limiter plug / cap
Tool to adjust mixture needles
Carburetor adjustment
1) Initial setting
H mixture needle
L mixture needle
Throttle adjust screw
Engine warm-up
2) Find idle maximum speed
3) Set idle maximum speed w/ TAS
4) Set idle speed
by turning L mixture needle CCW
5) Find WOT maximum speed
6) WOT setting
7) Verify nal engine speed with standard equipment
BTDC: Before top dead center.
CCW: Counterclockwise
1
* Turn TAS clockwise until its head touches boss. Then turn TAS counterclockwise.
SERVICE INFORMATION
MPa (kgf/cm
at 3,000 RPM
at 7,500 RPM
MPa (kgf/cm
turn out
turn out
turn out*
Idle - WOT : Total
WOT: Wide open throttle
TAS: Throttle adjust screw
2
) (psi)
mm(in) 0.6 - 0.7 (0.024 - 0.028)
mm(in)
mm(in)
mm(in) 0.3 - 0.4 (0.012 - 0.016)
°BTDC
°BTDC
2
) (psi)
mm(in) 0.1 - 0.25 (0.004 - 0.01) lower than diaphragm seat
Limiter plug P005-001270
1
sec.
Adjust L mixture needle to maximum idle speed
RPM
RPM
Adjust H mixture needle to maximum WOT speed
Turn H mixture needle CCW to decrease WOT
RPM
RPM
0.77 (7.8) (111)
4.0 (0.16)
6.0 (0.24)
960 - 1,000
30
30
0.05 (0.5) (7.0)
Screwdriver 2.5 mm
1 3/4
2 1 /2
13
10 - 180: 190
3500
3000
speed by : 10 - 30
Idle: 2800 - 3200
WOT: 7,150<
3