Stihl RL 540 Instruction Manual page 44

– Dirty or damaged spark plug; incorrect
electrode gap
Remedy:
– Press motorstop lever to handlebar and
hold ( 10.1)
– Top up fuel; clean fuel line (
(@), ( )
– Place scarifying unit in transport
position ( 7.5)
– Always use fresh, good quality fuel,
unleaded petrol; clean carburettor (@),
( )
– Clean air filter (@), ( )
– Connect spark plug socket; check
connection between ignition lead and
socket (@), ( )
– Clean or replace spark plug; adjust
electrode gap (@), ( )
Fault:
Starting problems or deteriorating engine
power
Possible cause:
– Scarifying unit not in transport position
– Blocked scarifier housing
– Mowing at an excessive working depth
or excessively fast pushing speed
– Water in fuel tank and carburettor;
blocked carburettor
– Contaminated fuel tank
– Dirty air filter
– Dirty spark plug
Remedy:
– Place scarifying unit in transport
position ( 7.5)
– Clean scarifier housing (detach spark
plug socket!) ( 11.2)
– Set smaller working depth or reduce
pushing speed ( 7.6)
– Empty fuel tank, clean fuel line and
carburettor (@), ( )
– Clean fuel tank (@), ( )
– Clean air filter (@), ( )
42
– Clean spark plug (@), ( )
Fault:
Engine overheating
Possible cause:
7.3),
– Oil level in engine too low
– Dirty cooling ribs
Remedy:
– Check oil level and change engine oil if
necessary (
– Clean cooling ribs (
Fault:
Excessive vibration during operation
Possible cause:
– Defective scarifying unit
– Loose engine mounting
Remedy:
– Check blades, blade shaft, spacer
bushings, fastening and bearings of
scarifying unit and repair if necessary
( 11.3), ( )
– Tighten engine mounts ( )
Fault:
Poor working results
Possible cause:
– Blades set too deep (bare patches, high
grass content in scarified material)
– Blade set too shallow (little or no lawn
thatch is removed)
– Blades have reached wear limit
– V-belt defective, worn or insufficiently
tensioned
Remedy:
– Reduce working depth (
– Increase working depth (
– Replace blades (
– Replace V-belt ( )
7.3)
11.2)
7.6)
7.6)
11.3), ( )
Fault:
Blades not turning freely
Possible cause:
– V-belt defective
– Scarifying unit defective
Remedy:
– Replace V-belt ( )
– Repair scarifying unit (
Fault:
Scarifying unit cannot be raised or lowered
Possible cause:
– Cable defective or detached
Remedy:
– Replace or repair cable ( )
Fault:
Working depth cannot be set
Possible cause:
– Scarifying unit in operating position
– Rotary handle or adjustment element
defective
Remedy:
– Place scarifying unit in transport
position ( 7.5)
– Repair rotary handle or adjustment
element ( )
0478 670 9907 B - EN
11.3), ( )