Stihl RL 540 - Page 19

0478 670 9907 C - EN
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– 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 (Ö 7.5)
–Clean scarifier housing (detach spark
plug socket!) (Ö 11.2)
– Set smaller working depth or reduce
pushing speed (Ö 7.6)
–Empty fuel tank, clean fuel line and
carburettor (@), (#)
–Clean fuel tank (@), (#)
–Clean air filter (@), (#)
–Clean spark plug (@), (#)
Fault:
Engine overheating
Possible cause:
–Oil level in engine too low
–Dirty cooling ribs
Remedy:
–Check oil level and change engine oil if
necessary (Ö 7.3)
–Clean cooling ribs(Ö 11.2)
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
(Ö 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 (Ö 7.6)
–Increase working depth (Ö 7.6)
–Replace blades (Ö 11.3), (#)
–Replace V-belt (#)
Fault:
Blades not turning freely
Possible cause:
–V-belt defective
–Scarifying unit defective
Remedy:
–Replace V-belt (#)
–Repair scarifying unit (Ö 11.3), (#)
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 (Ö 7.5)
–Repair rotary handle or adjustment
element (#)