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TROUBLESHOOTING
ENGINE PROBLEM TROUBLESHOOTING CHART
Problem
Check
Spark at
end of plug
Engine
wire
starts
hard or
Engine
does not
start
Spark at
plug
Air filter
Fuel filter
Engine
runs, but
Fuel vent
dies
Spark plug
or
Carburetor
Engine
does not
acceler-
Cooling
ate
system
properly
Spark
arrester
screen
Engine
does not
crank
46
Status
No spark
Air filter dirty Normal wear
Fuel filter
dirty
Fuel vent
plugged
Plug dirty or
worn
Improper
adjustment
Cooling
system dirty
or plugged
Spark
arrester
screen
plugged
N/A
Cause
Ignition at
STOP position
Electrical
problem
Interlock switch
Incorrect gap -
Covered with
carbon -
Fouled with
fuel - Plug
defective
Contaminants
or residue in
fuel
Contaminated
fuel
Normal wear
Vibration
Extended oper-
ation in dirty or
dusty locations
Normal wear
Internal engine
problem
© 10/23 ECHO Incorporated
EB790/RT
Remedy
Move ignition
away from STOP
position.
See your dealer
Adjust to
0.65 mm
(0.026 in.)
Clean or replace
plug
Clean or replace
Replace filter or
replace fuel
Clean or replace
Clean and adjust
or replace
Adjust
Clean
Replace
See your dealer
X7501201900
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