RB 800
English
4
THE PRESSURE WASHER
For illustrations and definitions of the 
pressure washer parts, see the chapter 
on "Main Parts."
WARNING
Never modify this pressure washer in 
any way. Only attachments supplied by 
STIHL or expressly approved by STIHL 
for use with the specific STIHL model 
are authorized. Although certain 
unauthorized attachments are usable 
with STIHL pressure washers, their use 
may, in fact, be extremely dangerous.
If this pressure washer is subjected to 
unusually high loads for which it was not 
designed (e.g., heavy impact or a fall), 
always check that it is in good condition 
before continuing work. Check in 
particular that the fuel system is tight (no 
leaks) and that the controls and safety 
devices are working properly. Do not 
continue operating this machine if it is 
damaged. In case of doubt, have it 
checked by your STIHL servicing dealer.
THE USE OF THE PRESSURE 
WASHER
Transporting the pressure washer
WARNING
Always switch off the engine before 
transporting the pressure washer. When 
transporting the pressure washer in a 
vehicle, properly secure it to prevent 
turnover, fuel spillage and damage.
STIHL recommends filling the pump with 
antifreeze if the pressure washer is to be 
transported or stored at temperatures 
near or below 32 °F (0 °C). See the 
storage information at the end of this 
chapter and the chapter "Storing the 
Machine."
WARNING
Use caution when opening or folding 
down the pushbar. Avoid pinching 
hands or other body parts between the 
pushbar and housing.
Fuel
WARNING
WARNING
Incorrect fuels shall not be used as they 
may prove hazardous.
Fueling Instructions
WARNING
Fuel your pressure washer in well-
ventilated areas, outdoors. Always shut 
off the engine and allow it to cool before 
refueling. Gasoline vapor pressure may 
build up inside the fuel tank depending 
on the fuel used, the weather conditions 
or other environmental conditions and 
the use of the machine.
In order to reduce the risk of burns and 
other personal injury from escaping gas 
vapor and fumes, remove the fuel filler 
cap on your pressure washer carefully 
so as to allow any pressure build-up in 
the tank to release slowly. Never remove 
the fuel filler cap while the engine is 
running. 
Select bare ground for fueling and move 
at least 10 feet (3 m) from the fueling 
spot before starting the engine. Refuel 
slowly. Avoid spilling fuel. Wipe off any 
spilled fuel before starting your machine.
Gasoline is an extremely 
flammable fuel. If spilled 
and ignited by a spark or 
other ignition source, it 
can cause fire and seri-
ous burn injury or 
property damage. Use 
extreme caution when 
handling gasoline or fuel 
mix. Do not smoke or 
bring any fire or flame 
near the fuel or the pres-
sure washer. Note that 
combustible fuel vapor 
may escape from the fuel 
system or gas can during 
fueling operations.