Stihl RMA 339 Manuel D'utilisation page 52

● Push height adjustment lever (1)
towards the lawn mower until locating
lugs (2) engage in the lever. The
selected cutting height can be read off
at front locating lug (3).
9.7 Grass catcher box
Attaching:
● Open ejection flap (1) and hold it
open.
● Attach grass catcher box (2) to
mountings (4) on rear of machine by
means of locating lugs (3).
● Close ejection flap (1).
Detaching:
● Open ejection flap (1) and hold it open.
● Lift grass catcher box (2) and remove
rearwards.
● Close ejection flap (1).
9.8 Level indicator
The flow of air generated by the
blade raises level indicator (1). The
flow of air stops when the grass catcher
box is full. If the flow of air is too low, level
indicator (1) returns to its resting state.
This is a prompt to empty the grass
catcher box.
The functionality of the level indicator is
restricted if the flow of air is impaired.
External influences such as wet, dense or
high grass, low cutting levels,
contamination or the like can impair the
flow of air and the functionality of the level
indicator.
A Grass catcher box is being filled
B Grass catcher box is filled
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● Empty the filled grass catcher box
( 12.4).
10. Notes on working with
the machine
10.1 General
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To ensure a perfect, thick lawn, mow
regularly and keep the grass short.
Do not cut the lawn too short in hot, dry
conditions as it will dry out or burn in the
sun and become unsightly.
The cutting pattern will be better with a
sharp blade than with a blunt one; the
blade should therefore be sharpened
regularly (STIHL specialist dealer).
10.2 Cutting performance
The cutting performance (battery running
time) depends on the quality of the grass
and the selected cutting height. The
cutting performance is enhanced by the
following measures:
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– Mowing the lawn more frequently
– Increasing the cutting height
– Reducing speed of propulsion
– Allowing the lawn to dry before mowing.
If required, additional STIHL lithium ion
batteries can be purchased (special
accessories).
Eco mode:
The lawn mower features an
eco mode, which improves its
energy efficiency and therefore
its cutting performance.
Eco mode can be switched on and off
using the switch in the battery
compartment. ( 9.3)
Function:
The speed of the motor is reduced
automatically when less power is required.
If more power is required, the speed is
increased again within a fraction of a
second.
10.3 Working area for operator
● For safety reasons, the operator
must stay within the working area
behind the handlebar when the motor is
running. Always observe the safety
distance provided by the handlebar.
● The lawn mower must only be operated
by one person. Other persons must
keep out of the danger area. (
10.4 Correct motor load
Do not switch the lawn mower on in tall
grass. Select a higher cutting height
setting if the motor is difficult to start.
The lawn mower load must never cause
the motor speed to drop significantly.
If the speed drops when mowing tall grass,
select a higher cutting height setting
and/or reduce the speed of propulsion.
When eco mode is switched on, the
speed is reduced automatically
when less power is required.
( 10.2)
0478 131 9927 C - EN
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4.)