Solo USA 280 User Manual

Page of 134
27
MS 270, MS 270 C, MS 280, MS 280 C
English / USA
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 maintenance 
chart near the end of the instruction 
manual. 
!
Warning!
Always stop the engine and make sure 
that the chain is stopped before doing 
any maintenance or repair work or 
cleaning the power tool. 
!
Warning!
Do not attempt any maintenance or 
repair work not described in your 
instruction manual. Have such work 
performed by your STIHL servicing 
dealer only. For example, if improper 
tools are used to remove the flywheel or 
if an improper tool is used to hold the 
flywheel in order to remove the clutch, 
structural damage to the flywheel could  
occur and could subsequently cause the 
flywheel to burst.
Wear gloves when handling or 
performing maintenance on saw chains.
!
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 
spark plug boot removed from the spark 
plug or with a removed spark plug, since 
uncontained sparking may cause a fire.
!
Warning!
Do not operate your chainsaw if the 
muffler is damaged, missing or modified. 
An improperly maintained muffler will 
increase the risk of fire and hearing loss. 
If your muffler was equipped with a 
spark-arresting screen to reduce the risk 
of fire, never operate your saw if the 
screen is missing or damaged. 
Remember that the risk of forest fires is 
greater in hot or dry weather. 
Keep the chain, bar and sprocket clean; 
replace worn sprockets or chains. Keep 
the chain sharp. You can spot a dull 
chain when easy-to-cut wood becomes 
hard to cut and burn marks appear on 
the wood. Keep the chain at proper 
tension. 
Tighten all nuts, bolts and screws except 
the carburetor adjustment screws after 
each use.
!
Warning! 
In order for the chain brake on your 
STIHL chainsaw to properly perform its 
function of reducing the risk of kickback 
and other injuries, it must be properly 
maintained. Like an automobile brake, a 
chainsaw chain brake incurs wear each 
time it is engaged. 
The amount of wear will vary depending 
upon usage, conditions under which the 
saw is used and other factors. Excessive 
wear will reduce the effectiveness of the 
chain brake and can render it 
inoperable.