TROUBLESHOOTING
PB-255LN
34
X7501186403
© 07/22 ECHO Incorporated
1.
Start engine, run at idle for one
minute.
2.
Complete warm up by running at
full throttle for 5 minutes,
operating choke twice to clear air
from carburetor chambers.
3.
Check idle speed and reset if
necessary. If a tachometer is
available, idle speed screw (A)
should be set to the
specifications found on
“Specifications” Page of this
manual. Turn idle screw (A)
clockwise to increase idle speed; counter clockwise to decrease idle
speed.
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
starts
hard or
Engine
does not
start
Fuel at
carburetor
No fuel at
carburetor
Fuel strainer or
fuel line
obstructed
Clean or replace
See your dealer
Fuel at
cylinder
No fuel at
cylinder
Carburetor
See your dealer
Muffler wet
with fuel
Fuel mixture
too rich
OPEN choke
Clean or replace
air filter
Adjust carburetor
See your dealer
A