Repair manual

9 Malfunction
89
9 Malfunction
Malfunction System Observation Cause
Cutting disc does
not start
Clutch Engine is running Clutch is damaged
Cutting disc
rotates when
engine is idling
Carburetor, clutch Cutting disc
rotates
Idle setting incorrect, clutch is
blocked
Engine will not
start or is hard to
start
Ignition system There is an igni-
tion spark
Malfunction in the fuel supply,
compression system,
mechanical fault
No ignition spark STOP switch was actuated,
fault or short-circuit in the
cable, spark plug connector or
spark plug is defective
Fuel supply Fuel tank is full Choke is in the wrong posi-
tion, carburetor is defective,
suction head is dirty, fuel line
is kinked or interrupted
Compression sys-
tem
Inside the unit Cylinder base gasket is
defective, oil seals are dam-
aged or the piston ring is
damaged
Outside of the unit The spark plug does not
make an airtight seal
Mechanical faults Starter does not
engage
Spring in the starter is broken,
broken parts within the engine
Warm start prob-
lems
Carburetor Fuel in tank, there
is an ignition
spark
Carburetor setting is incorrect
Engine starts, but
goes out again
immediately
Fuel supply Fuel in the tank Idle setting is incorrect, suc-
tion head or carburetor is
dirty, tank venting is defective,
fuel supply interrupted, cable
is damaged, STOP switch is
damaged, start valve is dirty
(happy start)
Insufficient power This may affect
several systems
Unit is idling Air filter is dirty, carburetor
setting is incorrect, muffler is
clogged, exhaust port in the
cylinder is clogged