SERVICE INFORMATION
SRM-510ES
3
1-2 Technical data
Model
SRM-510ES (L)
SRM-510ES (U)
Engine
Idling speed
r/min
2,750 +/- 250
Operating
speed
r/min
8,000
Wide open throttle speed
r/min
9,500 - 11,000*
1
11,000 - 11,700*
2
Clutch engagement speed
r/min
3,500
Service limit speed
†
r/min
3,300
Compression pressure
MPa (kgf/cm
2
) (psi)
0.83 (8.5) (121)
Ignition system
Spark plug gap
mm (in)
0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1000 r/min
kV
14.0
Secondary coil resistance
k
Ω
2.0 - 2.8
Pole shoe air gaps
mm(in)
0.30 - 0.40 (0.012 - 0.016)
Ignition timing
at 1,000 r/min
°BTDC
22
at 3,000 r/min
°BTDC
15
at 8,000 r/min
°BTDC
25
at 10,000 r/min
°BTDC
25
PET-9000
Parameter #1
328
#2
05
Carburettor
Idle adjust screw initial setting
turns in**
1 1/2
Idle mixture needle initial setting
turns in***
13
Hi speed mixture needle initial setting
turns out 3
3/4
Test Pressure, minimum
MPa (kgf/cm
2
) (psi)
0.05 (0.5) (7.0)
Metering lever height
mm (in)
1.5 (0.06) lower than diaphragm seat
Air cleaner system
type
Inner
vent
Air
fi
lter
Pleats
BTDC: Before top dead centre.
*
1
With Nylon line cutter and shield.*
2
With 3-tooth blade (255 mm).
** Set idle adjust screw to the point that its tip just contacts throttle plate before initial setting.
*** Screw in idle mixture needle from initial thread engagement (at the point that the clicking sound is heard).
†
If clutch engagement speed is lower than service limit speed, replace clutch assembly with new one.