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● The lawn mower must only be operated 
by one person. Other persons must 
keep out of the danger area. ( 5.)
12.2 Lawn mower with lawn roller
The model RM 655 RS is equipped 
with a two-part drive roller on the 
rear axle.
This permits accurate mowing along lawn 
edges or around plants. The grass is also 
rolled in the direction of travel, creating a 
characteristic striped lawn pattern.
12.3 Applications
The lawn mower is equipped with a multi-
blade and can be used as a mulching 
mower or rear discharge mower as well 
as a grass collector.
● To use the machine as a mulching 
mower, install the mulch insert. ( 8.5)
● For use as a rear discharge mower or 
grass collector (with grass catcher box), 
remove the mulch insert from the 
machine. ( 8.5)
12.4 How should mulching be 
performed?
Mulching is only possible with the models 
RM650T, RM650V, RM650VE, 
RM 650 VS, RM 655 V, RM 655 VS, 
RM 655 YS. 
A cutting height between 4 and 7 should 
be selected for mulching, as this is the 
most suitable height for shredding the 
grass.
If the cutting height is too low, the mower 
housing may become clogged, resulting in 
blockage of the mowing blade
It is important to select the correct 
operating speed and cutting height for 
mulching to allow the mowing blade to 
achieve optimal grass shredding and a 
good cutting pattern.
In high grass, it is advisable to work in 
several stages and in the higher cutting 
height settings.
Mulching should not be performed when 
the grass is too high or wet.
13.1 Checking the blade brake clutch
Operation of the blade brake clutch must 
be checked three times before starting 
work.
● Engage the mowing blade with the 
engine running. ( 13.6)
A running mowing blade generates a 
clearly audible wind noise.
● Disengage the mowing blade (release 
the handlebar). ( 13.7)
The blade brake clutch disengages the 
mowing blade from the engine drive 
and brakes it. This procedure is 
accompanied by stopping of the wind 
noise and lasts a maximum of 3 
seconds. No wind noise must be 
audible when the blade is stopped. The 
blade brake time can be measured 
using a stopwatch.
13.2 Starting the engine 
(RM 650 T, RM 650 V, RM 655 V)
● Check the oil and fuel levels. ( 8.6)
● 1 Press motorstop lever (1) to the 
handlebar and hold.
● 2 Slowly pull out recoil starter rope (2) 
to the point of compression resistance. 
Then pull vigorously and quickly to 
arm’s length. Slowly return recoil starter 
rope (2) again so that it is rolled up 
again.
● Repeat the procedure until the engine 
starts.
13. Operating the machine
Risk of injury!
Should the blade brake clutch not 
work as described (e.g. longer 
blade brake time than 3 seconds or 
continuing audible wind noise when 
the mowing blade is disengaged), 
the machine must not be operated.
In this case, switch off the engine, 
detach the spark plug socket and 
have the necessary repairs 
performed by a qualified technician. 
STIHL recommends STIHL 
specialist dealers.
Avoid damage to the machine!
Do not start the engine in tall grass. 
Select a higher cutting height 
setting if the engine is difficult to 
start.
Thanks to the fixed throttle setting, 
the engine always operates at the 
optimum working speed after 
starting.