ENNO
3
SVFIDAPL         
0478 192 9810 A - EN
Dear Customer,
Thank you for choosing STIHL. We 
develop and manufacture our quality 
products to meet our customers' 
requirements. The products are designed 
for reliability even under extreme 
conditions.
STIHL also stands for premium service 
quality. Our specialist dealers guarantee 
competent advice and instruction as well 
as comprehensive service support.
We thank you for your confidence in us 
and hope you will enjoy working with your 
STIHL product.
Dr. Nikolas Stihl
IMPORTANT: READ BEFORE USE AND 
KEEP IN A SAFE PLACE.
Printed on chlorine-free bleached paper. Paper is recyclable. Cover is halogen free.
1. Table of contents
Notes on the instruction manual 4
General 4
Instructions for reading the 
instruction manual 4
Machine overview 6
For your safety 7
General 7
Training – learning to use the 
machine 8
Transporting the ride-on mower 8
Refilling the tank – handling petrol 9
Clothing and equipment 9
Before operation 9
Working with your machine 10
Maintenance and repairs 13
Storage for prolonged periods 
without operation 14
Disposal 14
Description of symbols 15
Standard equipment 15
Operations prior to initial use 15
Controls 16
Ignition lock 16
Throttle lever with choke function 
(RT 4097 S, RT 4097 SX, 
RT 4112 S) 16
Throttle lever (RT 4112 SZ) 17
Choke knob (RT 4112 SZ) 17
Mowing deck switch 18
Reverse mowing safety switch 18
Driving direction selector lever 19
Steering wheel 19
Driver’s seat adjustment 19
Drive pedal 19
Brake pedal 20
Parking brake 20
Cutting height adjustment lever 21
Gearbox freewheel lever 21
Electronics 22
Self-diagnosis when starting 22
Ride-on mower faults during 
operation 22
Electronics faults 22
Notes on working with the 
machine 23
Mowing operation 23
Safety devices 24
Operating the machine 24
Filling the fuel tank 24
Starting the engine 25
Stopping the engine 26
Driving 26
Braking 27
Adjusting the cutting height 27
Mowing 27
Pulling loads 28
Operating on slopes 28
Mowing deck 28
Removing the mowing deck 28
Installing the mowing deck 30
Maintenance 32
Maintenance schedule 32
Cleaning the machine 33
Opening the engine hood 33
Closing the engine hood 34
Checking the safety devices 34
Mowing blade maintenance 34
Checking the installation position of 
the mowing deck 36
Fuel cock 37
Tyre pressure 37