Echo CS-303T - Manual (Page 35)

CS-303T TROUBLESHOOTING
© 08/2013 ECHO Inc.
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TROUBLESHOOTING
Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition
spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury may
result.
ENGINE PROBLEM TROUBLESHOOTING CHART
Problem Check Status Cause Remedy
Engine cranks -
starts hard/

doesn’t start
Fuel at carburetor No fuel at carburetor
Fuel strainer clogged

Fuel line clogged
Carburetor
Clean or replace

Clean or replace

See your Echo dealer
Fuel at cylinder
No fuel at cylinder Carburetor See your Echo dealer
Muffler wet with fuel Fuel Mixture too rich
Open choke

Clean/replace air filter
Adjust carburetor

See your Echo dealer
Spark at end of
plug wire
No spark
Stop switch off

Electrical problem

Interlock switch
Turn switch to ON

See your Echo dealer

See your Echo dealer
Spark at plug No spark
Spark gap incorrect
Covered with carbon

Fouled with fuel

Plug defective
Adjust to .65mm (0.026 in.)

Clean or replace

Clean or replace

Replace plug
Engine runs,

but dies or

does not
accelerate
properly
Air filter Air filter dirty Normal wear Clean or replace
Fuel filter Fuel filter dirty
Contaminants/residues
in fuel
Replace
Fuel vent Fuel vent plugged
Contaminants/residues
in fuel
Clean or replace
Spark Plug Plug dirty/worn Normal wear Clean and adjust or replace
Carburetor Improper adjustment Vibration Adjust
Cooling System
Cooling system
dirty/plugged Extended operation in
dirty/dusty locations
Clean
Spark Arrestor
Screen Spark arrestor screen
plugged
Normal wear Replace
Engine does
not crank
N/A N/A Internal engine problem See your Echo dealer