Folding Down The Handlebar; Attaching And Detaching The Recoil Starter Rope; Cutting Height Adjustment; Safety Devices - Viking MB 4 R Manuel D'utilisation

● Tighten the nuts (1) and (2) again.

8.3 Folding down the handlebar

The handlebar can be folded down
for space-saving transport and
storage of the mower.
Danger of pinching!
The handlebar can fold down or
retract inadvertently when the
quick-clamping device/handlebar
screw fastening is released.
For this reason, always hold the
handlebar with one hand while
releasing the fastening.
● Stop the engine and remove the spark
plug socket. ( 11.2)
● Detach the recoil starter rope. (
● MB 4 R, MB 4 RT, MB 4 RV:
Hold handlebar (1), open left and right
quick-clamping devices (2) and
carefully fold the handlebar downwards
to the front.
● MB 4 RTP:
Hold handlebar (1), loosen left and right
nuts (2) and carefully fold the handlebar
downwards to the front.
8.4 Attaching and detaching the
recoil starter rope
Attaching
● Detach the spark plug socket from the
engine.
● Press the motorstop lever (1) to the
handlebar and hold.
● Slowly pull out the recoil starter
rope (2).
0478 111 9929 B - EN
● Release the motorstop lever (1) and
attach the recoil starter rope (2) to the
rope guide (3).
● Connect the spark plug socket.
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Detaching
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● Detach the spark plug socket from the
engine.
● Detach the recoil starter rope (2) from
the rope guide (3).

8.5 Cutting height adjustment

Risk of injury!
Stop the engine before adjusting
the cutting height.
Five different cutting heights can be set.
8.4)
The highest cutting level
(70 mm) is selected when the
cutting height adjustment
lever is in the rearmost
position (see marking).
The lowest cutting level (30 mm) is
selected when the cutting height
adjustment lever is in the frontmost
position.
● Press the cutting height adjustment
lever (1) outwards towards the rear
wheel and hold in position.
● Set the cutting height adjustment
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lever (1) to the required position in the
detent segment (2) and allow it to
engage.

9. Safety devices

9.1 Motorstop lever

The lawn mower is equipped with a
motorstop device.
The engine stops when the motorstop
lever is released during running operation.
The engine and blade come to a standstill
within 3 seconds.
Risk of injury!
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If the run-on time of the blade
exceeds this delay, stop using the
machine and take it to your
specialist dealer.
Measuring the run-on time
Following engine start-up, the blade
rotates and a wind noise is audible. The
run-on time corresponds to the duration of
the wind noise after the engine stops. This
can be measured using a stopwatch.
10. Notes on working with
the machine

10.1 General information on mulching

During mulching, the cut grass is chopped
up several times through a special air flow
guidance system in the mower blade area
and then blown back into the turf. The
clippings remain on the lawn.
Benefits
The decomposing clippings return organic
nutrients to the soil, serving as a natural
fertiliser.
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