26
Maintenance and care
Problem Diagnosis Cause Solution
The engine does 
not start
1.  There is no fuel in the fuel tank
2.  The stop switch is in the Stop position
3.  Excess fuel suction
4. Electrical fault
5.  Carburettor malfunction or internal stick-
ing
6.  Internal engine malfunction
1. Fuel supply
2.  Move to the Start po-
sition
3.  Start the engine after 
servicing
4.  Consult your dealer
5.  Consult your dealer
6.  Consult your dealer
Engine is difficult to 
start, fluctuating ro-
tation
Fuel is entering the overflow 
pipe
1. Fuel degradation
2. Carburettor problem
1.  Replace with new fuel
2.  Consult your dealer
No fuel is entering the over-
flow pipe
1.  Fuel filter is clogged
2.  Fuel system is clogged
3.  Internal carburettor parts sticking
1.  Clean or replace
2.  Consult your dealer
3.  Consult your dealer
The spark plug is dirty or 
damp
1. Fuel degradation
2. Incorrect electrode gap
3. Carbon deposits
4. Electrical fault
1. Replace
2.  Adjust or replace
3.  Clean or replace
4.  Consult your dealer
Engine starts but 
no acceleration is 
possible
1.  Dirty air filter
2. Dirty fuel filter
3. Blocked fuel passage
4. Carburettor adjustment problem
5.  Blocked exhaust vent or silencer vent
1.  Clean or replace
2.  Clean or replace
3.  Consult your dealer
4. Adjust
5. Clean
The engine stops 1.  Carburettor adjustment problem
2. Electrical fault
1. Adjust
2.  Consult your dealer
The engine fails to 
stop
1.  Stop switch malfunction 1.  Perform an emergen-
cy stop and consult 
your dealer
Cutting attachment 
rotates when the 
engine is idling
1. Carburettor adjustment problem
2.  Damaged clutch spring
1. Adjust
2.  Consult your dealer
 Consult your dealer in the event of a problem that is not covered in the table above, or other such concerns.
 Please contact your dealer in order to dispose of the product or its parts in compliance with national laws.
Manufacturer:
YAMABIKO CORPORATION
1-7-2 Suehirocho, Ohme, Tokyo 198-8760 JAPAN
Authorized Representative in Europe:
CERTIFICATION EXPERTS B.V.
Stationsplein 30, 1382AD Weesp, The Netherlands