Echo CS-490 User Manual

30
CS-490
TROUBLESHOOTING
WARNING
Fuel vapors are extremely flammable and
maycausereand/orexplosion.Nevertest
for ignition spark by grounding spark plug
near cylinder plug hole, otherwise serious
personal injury may result.
Problem
Engine — hard to start Cause Remedy
—
does not start
Engine
cranks
Fuel at
carburetor
No fuel at
carburetor
•Fuellterclogged •Cleanorreplace
•Fuellineclogged •Clean
•Carburetor •AskyourECHOdealer
Fuel at
cylinder
No fuel at
cylinder
•Carburetor •AskyourECHOdealer
Muffler wet with
fuel
•Fuelmixtureistoorich •Openchoke
•Clean/replaceairlter
•Adjustcarburetor
•AskyourECHOdealer
Spark at end
of plug wire
No spark at end
of plug wire
•Ignitionswitchoff •Turnswitchon
•Electricalproblem •AskyourECHOdealer
Spark at plug No spark at plug •Sparkgapincorrect •Adjust0.6to0.7mm
•Coveredwithcarbon •Cleanorreplace
•Fouledwithfuel •Cleanorreplace
•Sparkplugdefective •Replaceplug
Engine
does not
crank
•Internalengineproblem •AskyourECHOdealer
Engine
runs
Dies or accelerates poorly •Airlterdirty •Cleanorreplace
•Fuellterdirty •Cleanorreplace
•Fuelventblocked •Clean
•Sparkplug •Cleanandadjust/replace
•Carburetor •Adjust
•Coolingsystemblocked •Clean
•Exhaustport/spark
arrestor screen blocked
•Clean

Echo CS-490 Specifications

General

Engine Displacement	50.2 cc
Chain Pitch	0.325 inches
Chain Gauge	0.050 inches
Ignition System	Digital
Vibration Reduction System	Yes
Bar Length	18 inches
Weight	10.6 lbs (dry weight)
Fuel Tank Capacity	16.6 fl. oz.