Troubleshooting Table - Echo PB-251 Operator's Manual

Maintenance and care
Check spark plug
a: 0.6 - 0.7 mm

Troubleshooting table

Problem
Engine is diffi- No fuel is entering the over-
cult to start, flow pipe
fluctuating ro-
tation
Fuel is entering the over-
or
flow pipe
The engine
does not start
The crankshaft does not ro-
tate
The spark plug is dirty or
damp
Engine starts
but no accel-
eration is pos-
sible
Checking and maintenance requires specialist knowledge. If you are unable to check and maintain the product or deal with a
fault yourself, consult your ECHO DEALER. Do not attempt to dismantle the product.
Consult your ECHO DEALER in the event of a problem that is not covered in the table above, or other such concerns.
For spare parts and consumables, please use only genuine parts and designated products and components. Using parts from
other manufacturers or non-designated components may result in a malfunction.
Diagnosis
Fuel filter is clogged
Fuel system is clogged
Internal carburettor parts sticking
Fuel degradation
Carburettor problem
Internal engine malfunction
Fuel degradation
Incorrect electrode gap
Carbon deposits
Electrical fault
Dirty air filter
Dirty fuel filter
Blocked fuel passage
Carburettor adjustment problem
Spark plug problem
Blocked exhaust vent or silencer vent
Spark arrestor screen plugged or normal
wear
Tools required:T-Wrench,Feeler gauge
Parts required:Spark plug
IMPORTANT
Use only NGK BPMR8Y spark plug otherwise severe engine
damage may occur.
1. Check plug gap. Correct gap is 0.6 mm to 0.7 mm.
2. Inspect electrode for wear.
3. Inspect insulator for oil or other deposits.
4. Replace plug if needed and tighten to 15 N
. .
kgf cm to 170 kgf cm).
Cause
24
. .
m - 17 N m (150
Solution
Clean or replace
Clean
Consult your ECHO
DEALER
Replace with new fuel
Consult your ECHO
DEALER
Consult your ECHO
DEALER
Replace with new fuel
Adjust or Replace
Clean or Replace
Consult your ECHO
DEALER
Clean or replace
Clean or replace
Consult your ECHO
DEALER
Consult your ECHO
DEALER
Clean, Adjust or Re-
place
Clean
Clean or replace