Echo CS-680 Instruction Manual - Troubleshooting

30

CS-680

TROUBLESHOOTING

   WARNING

Fuel vapors are extremely flammable and 

maycausefireand/orexplosion.Nevertest

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

•Fuelfilterclogged

•Cleanorreplace

•Fuellineclogged

•Clean

•Carburetor

•AskyourECHOdealer

Fuel at  

cylinder

No fuel at  

cylinder

•Carburetor

•AskyourECHOdealer

Muffler wet with 

fuel 

•Fuelmixtureistoorich

•Openchoke

•Clean/replaceairfilter

•Adjustcarburetor

•AskyourECHOdealer

Spark at end 

of plug wire

No spark at end 

of plug wire

•Ignitionswitchoff

•Turnswitchon

•Electricalproblem

•AskyourECHOdealer

Spark at plug

No spark at plug •Sparkgapincorrect

•Adjust0.65mm(0.026in.)

•Coveredwithcarbon

•Cleanorreplace

•Fouledwithfuel

•Cleanorreplace

•Sparkplugdefective

•Replaceplug

Engine 

does not 

crank

•Internalengineproblem •AskyourECHOdealer

Engine 

runs

Dies or accelerates poorly

•Airfilterdirty

•Cleanorreplace

•Fuelfilterdirty

•Cleanorreplace

•Fuelventblocked

•Clean

•Sparkplug

•Cleanandadjust/replace

•Carburetor

•Adjust

•Coolingsystemblocked •Clean

•Exhaustport/spark 

arrestor screen blocked

•Clean