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

Brand	Echo
Model	CS-490
Category	Chainsaw
Language	English