SR 430, SR 450
English
13
WARNING
After Finishing Work
Always wash yourself thoroughly with 
soap and water after spraying or 
handling chemicals. Shower 
immediately, and wash all protective 
clothing separately from other items. 
Follow any additional recommendations 
of the chemical manufacturer.
Always clean dust and dirt off the power 
tool.
WARNING
Empty, rinse and clean container and 
assembly after each use. This helps to 
prevent the solution from crystallizing, 
which could later cause clogging and 
chemical damage to the unit. In addition, 
residual chemicals may have 
undesirable effects during subsequent 
spraying with a different type of chemical 
(e.g., residual herbicide may damage or 
kill plants being sprayed with a 
pesticide).
Do not store the mistblower with spray 
solution in the container.
Store the unit in a place secured against 
unauthorized use. 
MAINTENANCE, REPAIR AND 
STORING
Maintenance, replacement, or repair of 
the emission control devices and 
systems may be performed by any 
nonroad engine repair establishment or 
individual. However, if you make a 
warranty claim for a component which 
has not been serviced or maintained 
properly or if nonapproved replacement 
parts were used, STIHL may deny 
coverage.
WARNING
Use only identical STIHL replacement 
parts for maintenance and repair. Use of 
non-STIHL parts may cause serious or 
fatal injury.
Strictly follow the maintenance and 
repair instructions in the appropriate 
section in this instruction manual. 
Please refer to the maintenance chart in 
this instruction manual.
WARNING
Always stop the engine and make sure 
that the fan is stopped before doing any 
maintenance or repair work or cleaning 
the power tool. Do not attempt any 
maintenance or repair work not 
described in this instruction manual. 
Have such work performed by your 
STIHL servicing dealer only.
Do not clean your machine with a 
pressure washer. The solid jet of water 
may damage parts of the machine.
WARNING
Use the specified spark plug and make 
sure it and the ignition lead are always 
clean and in good condition. Always 
press spark plug boot snugly onto spark 
plug terminal of the proper size. (Note: If 
terminal has detachable SAE adapter 
nut, it must be securely attached.) A 
loose connection between spark plug 
terminal and the ignition wire connector 
in the boot may create arcing that could 
ignite combustible fumes and cause a 
fire.
WARNING
Never test the ignition system with the 
boot removed from the spark plug or 
with a removed spark plug, since 
uncontained sparking may cause a fire.
WARNING
Do not operate your power tool if the 
muffler is damaged, missing or modified. 
An improperly maintained muffler will 
increase the risk of fire and hearing loss. 
Your muffler is equipped with a spark-
arresting screen to reduce the risk of 
Some STIHL power tools 
are equipped with a cata-
lytic converter, which is 
designed to reduce the 
exhaust emissions of the 
engine by a chemical 
process in the muffler. 
Due to this process, the 
muffler does not cool 
down as rapidly as con-
ventional mufflers when 
the engine returns to idle 
or is shut off. To reduce 
the risk of fire and burn 
injuries when using a cat-
alytic converter, always 
set your power tool down 
in the upright position and 
never locate it where the 
muffler is near dry brush, 
grass, wood chips or 
other combustible materi-
als while it is still hot.