33
Possible faults
Before each fault clearance:
−
switch off device
−
wait until the cutting device no longer moves
−
pull off the spark plug connector
−
wear gloves
After each fault clearance, put into operation and recheck all security installations.
Fault
Possible cause
Removal
Engine does not start.
Incorrect starting sequence
Air filter contaminated
Fuel filter fouled
Spark plug fouled
No fuel supply
Fault in the fuel line
Cranking mechanism defective
Spark plug connector not placed on
No ignition spark
Engine flooded.
Engine defective
Carburettor defective
Observe the correct starting sequence
Clean or replace the air filter
Clean or replace the fuel filter
Clean or replace the spark plug
Fill the fuel tank.
Check the fuel line for kinks or damages
Contact the customer service.
Screw off, clean and dry the spark plug. Then pull the
cranking rope several times and reinstall the spark
plug
Place on the spark plug connector.
a) Clean or replace the spark plug.
b) Check the ignition cable.
c) Fault cannot be eliminated?
Contact the customer service
Contact the customer service
Contact the customer service
Engine starts and is
stalled immediately
Incorrect idle adjustment
Contact the customer service
Device does not work
with full power
Machine overloaded.
Cutting thread too short/broken.
Device overloaded as grass too high.
Air filter contaminated
Carburettor incorrectly adjusted
Silencer blocked
Do not excessively press during trimming
Follow up the cutting thread.
Trim the grass in several passes.
Clean or replace the air filter
Contact the customer service
Clean the outlet of the silencer
Device works with
interruptions
Carburettor incorrectly adjusted
Spark plug fouled
Contact the customer service
Clean or replace the spark plug. Check the spark plug
connector
The brush cutter does not
work with full output
Cutting blade dull or damaged
Device overloaded as grass too high
Have the cutting blade sharpened or replace it
Trim the grass in several passes.
The grass trimmer does
not work with full output
Cutting thread too short/broken.
Device overloaded as grass too high.
Follow up the cutting thread.
Trim the grass in several passes
Cutting thread is not
followed up.
No more thread on the spool.
Cutting thread entangled.
Replace the thread spool.
Recoil the cutting thread.
Smoke
Incorrect fuel
Carburettor incorrectly adjusted
Use Petrol: Octane number at least 91 ROZ unleaded
Contact the customer service
In case of further faults or inquiries please contact your local dealer.
Summary of Contents for BF 31-4T
Page 2: ......
Page 51: ...51 15 m 6000 min 1 7000 min 1 I O Cold start Warm start LWA 113 dB A 2000 14 EO 13 mm...
Page 52: ...52 ahveq 7 06 m s K 1 5 m s t 10 C...
Page 53: ...53 16...
Page 54: ...54...
Page 56: ...56 4 4b 4a 9 39 28 38 29 30 6 H 39 9 28 29 30 7 H 30 29 28 28 38 H 39 9 91 ROZ 91 ROZ 23...
Page 58: ...58 12 15 14 4 13 5 20 l 6 24 7 20 4 7 8 1 15 14 12 15 15 13 13 7 4 4 4b 4b 4a 4 G...
Page 59: ...59 5a L 15 I...
Page 60: ...60 6a 6b 6c 6c I 6b I 6a I 10 23 J 16 31 32 22 32 17 33 38 0 6 0 7...
Page 61: ...61 10 15Nm 100 1x TORCH 33 17 13 22 21 0 08 l 18...
Page 62: ...62 7 10 7a 10a 7 7a 6 1 2 3 4 5 6 1 6 7 8 1...
Page 64: ...64 8 25 100...
Page 65: ...65 91 ROZ...