63
SRM-250/250SI
E
N
G
L
I
S
H
D
E
U
T
S
C
H
I
T
A
L
I
A
N
O
SRM-250 (SI)
LU
Mass :
unit without cutting attachment, empty tank kg 5.4 (5.6) 5.7 (5.9)
unit with specified cutting attachment, empty tank kg 5.6 (5.8) 6.1 (6.3)
unit with specified cutting attachment, full tank kg 5.9 (6.1) 6.4 (6.6)
Volume : fuel tank L 0.4
Cutting attachment :
nylon line head F-4/10 -
line diameter mm 3.0 -
line length m 2 × 1 line -
thread Left-handed M10 × 1.25 -
specified blade diameter mm - 230
specified blade thickness mm - 2.0
number of cutting teeth - 3
blade centre hole diameter mm - 25.4
blade rotational speed at maximum allowable
engine speed r/min - 10000
Gear ratio : gear ratio and lubrication 1.36 reduction and good quality lithium grease
Rotational direction of output shaft seen
from above : Anticlockwise
External dimensions :
length mm 1755 (1785) 1760 (1790)
width mm 340 670
height mm 285 460
Engine :
type Air cooled two stroke single cylinder
engine displacement mL(cm
3
) 23.6
maximum shaft brake power, measured in
accordance with ISO 8893 kW 0.735
engine speed at maximum engine power r/min 7000
recommended maximum engine speed r/min 10000
output shaft speed r/min -
recommended engine idling speed r/min 2900
carburettor Diaphragm type
ignition Flywheel magneto - CDI system
spark plug NGK BPMR7A
starter Recoil starter (SRM-250SI ;
START)
clutch Automatic centrifugal clutch
Fuel : Regular grade petrol. Minimum 89 Octane unleaded
petrol is recommended. Do not use fuel containing
methyl alcohol or more than 10 % of ethyl alcohol.
oil Two stroke, air-cooled engine oil. ISO-L-EGD Standard
(ISO/CD 13738), JASO FC, FD grade and ECHO
Premium 50 : 1 oil.
ratio 50 : 1 (2 %)
fuel consumption at maximum engine power L/h 0.70
specific fuel consumption at maximum
engine power g/(kW• h) 705
Sound pressure level : (EN 27917) LpAav = dB(A) 93 (93) 90.3 (90.3)
Guaranteed sound power level :
(2000/14/EC) L
WA = dB(A) 107 (107) 107 (107)
Vibration levels : (ISO 7916)
idling m/s
2
3.6 (2.0) 3.9 (2.2)
racing m/s
2
4.9 (7.8) 2.6 (4.3)
GB
SPECIFICATIONS
Specifications, descriptions and illustrative material in
this literature are as accurate as known at the time of
publication, but are subject to change without notice.
Illustrations may include optional equipment and
accessories, and may not include all standard
equipment.
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