CS-310 SPECIFICATIONS
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© 02/2019 ECHO Inc.
SPECIFICATIONS
* Technical data subject to change without notice.
Model CS-310
Length 396 mm (15.6 in.)
Width 232 mm (9.1 in.)
Height 273 mm (10.7 in.)
Dry weight 4.0 kg (8.8 lb.) Without chain and guide bar
Engine Air-cooled two-stroke single cylinder
Displacement 30.5 mL (1.861 cu. in.)
Bore 36.0 mm (1.417 in.)
Stroke 30.0 mm (1.181 in.)
Compressions ratio 6.7:1
Carburetor Diaphragm type
Spark plug NGK BPMR8Y (Gap 0.65 mm [0.026 in.])
Fuel tank capacity 250 mL (8.45 US. fl. oz.)
Fuel/Oil Ratio 50:1
Gasoline Use 89 octane unleaded. Do not use fuel
containing methyl alcohol, more than 10% ethyl
alcohol or 15% MTBE. Do not use alternative
fuels such as E-15 or E-85.
Oil ISO-L-EGD (ISO/CD 13738) and JASO M345-
FD two-stroke, air-cooled engine oil.
Oiling system automatic oiler
Chain oil capacity 260 mL (8.8 US. fl. oz.)
Starter system Automatic rewind starter
Clutch Centrifugal type
Sprocket type Spur type, 6-tooth, 3/8 in. pitch
Chain brake Automatic band brake type
Idle speed 3,200 RPM
Clutch engagement speed 4,200 RPM
Wide open throttle speed
(W.O.T.)
12,500 RPM
Chain tensioner Side access system
Guide bar 12, 14, 16 in
Saw chain 91PX/91VG
Standard features Front hand guard, Rear hand guard, Anti-
vibration device, Throttle control lockout, Chain
catcher, Spark arrestor muffler, Tip guard,
(Spiked bumper; Option)
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