Echo 99944200610, SRM-2100SB, SRM-2400SB, SRM-210SB, SRM-211SB, SRM-260SB, SRM-261SB, PAS-2100, PAS-2400, PAS2601, PAS-210,..., Service Manual

Page: 3 / 5

Model SRM-2100SB SRM-2400SB
E ngine
Idling speed rpm 2400-3200 2400-3200
Operating speed w/ Nylon line head rpm 8000-9000 8500-9500
wl Blade(Option) rpm 9500- 11000
9500- 11000
Clutch-in speed rpm 3400-3800 3400-3800
Compression pressure, standard kgf/cm2(psi) 7.0(100) 7.5 (107)
I nition system
Spark plug gap mm(in) 0.6- 0.7 (0.024- 0.028)
Minimum secondary voltage at 1000 rpm kV 15
Secondary coil resistance kQ 1.3- 1.8
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing 0 BTDC ( 33) 28 28
1-2 Technical data
g
BTDC: Before top dead center.
1-3 Carburetor data
Carburetor Model C1U-K47
I
C1U-K52 WT-424A
I
WT-4248
Type Diaphragm horizontal-draught
Supplier ZAMA
Walbro
Venturi Size mm(in) 8.5 (0.335)
7.94 (5/16)
Throttle Bore mm(in)
12.7(1/2) 12.7 ( 1/2)
Idle speed screw initial setting_ turn in 3-4
3-4
Test Pressure, minimum kgf/cm2(psi) 0.5 (7.0)
Metering lever height mm(in)
lower than diaphragm seat
0.1 - 0.25 (0.004 - 0.010)
1.65 (0.065)
Applicable model
SRM-210058 SRM-240058