Repairing; Troubleshooting - Stihl RM 4.0 RV Instruction Manual

English
► Unscrew bolt (2) and remove together with
washer (3).
► Remove blade (1).
► Discard bolt (2) and washer (3).
Use a new bolt and washer to attach blade (1).
16.2.2 Attaching the Blade
► Stop the engine.
► Detach the spark plug socket.
► Upend the lawn mower.
► Place new washer (1) on new bolt (2).
► Apply Loctite 243 thread locker to the thread
of bolt (2).
► Position blade (3) so the raised areas on the
contact area engage in the notches in
blade (3).
► Screw in bolt (2) together with washer (1).
► Hold blade (3).

18 Troubleshooting

18.1 Remedying Lawn Mower Faults
Fault Cause
Engine cannot Control bar for mowing is not
be started. pressed.
Fuel tank is empty.
Fuel line is blocked.
Inferior, dirty or old fuel in the
tank.
Air filter is dirty.
Spark plug socket is detached
from spark plug or ignition lead
is not properly fastened to
socket.
32
► Tighten bolt (2) to 65 Nm.
16.3 Sharpening and Balancing the
Blade
Sharpening and balancing the blade correctly
requires a lot of practice.
STIHL recommends having the blade sharpened
and balanced by a STIHL specialist dealer.
WARNING
■ The cutting edges of the blade are sharp. This
may result in the user cutting themselves.
► Wear protective gloves made from resistant
material.
► Stop the engine.
► Detach the spark plug socket.
► Upend the lawn mower.
► Remove the blade.
► Sharpen the blade. Observe the sharpening
angle and cool the blade,
Bluing of the blade during sharpening is not
permitted.
► Attach the blade.
► If anything is unclear: consult a STIHL special‐
ist dealer.

17 Repairing

17.1 Repairing the Lawn Mower
The user should not repair the lawn mower or
blade themselves.
► If the lawn mower or blade is damaged: do not
use the lawn mower or blade and consult a
STIHL specialist dealer.
► If warning signs are illegible or damaged: have
the warning signs replaced by a STIHL spe‐
cialist dealer.
Remedy
► Start engine as described in this instruction
manual.
► Refuel lawn mower.
► Consult a STIHL specialist dealer.
► Use fresh, good-quality unleaded petrol.
► Consult a STIHL specialist dealer.
► Connect spark plug socket.
► Check connection between ignition lead and plug.
17 Repairing
19.2.
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