STIHL  Oilomatic  chain,  guide 
bar  and  sprocket  must 
match each other 
in  gauge and pitch. 
Before  replacing 
any 
bar and  chain, 
see 
the  sections 
on 
"Specifications", 
kickback  and  the  ANSI  B  175.1-1985 
chain saw  kickback standard 
in this manual. 
Warning! 
Proper tension  of the 
chain  is  extremely important. 
In  or- 
der 
to 
avoid  improper 
setting,  the tensioning  procedure 
must 
be  followed 
as 
described  in 
your  manual.  Always 
make  sure the  hexagonal  nut(s)  for the sprocket 
cover  is 
(are)  tightened  securely after tensioning  the 
chain.  Never 
start the saw  with the sprocket cover loose. Check 
chain 
tension  once  more 
after having  tightened 
the  nut(s)  and 
thereafter 
at 
regular  intervals  (whenever the 
saw 
is  shut 
off).  If the chain becomes  loose while cutting,  shut off the 
engine  and  then  tighten. 
Never  try  to  tighten  the  chain 
while the engine 
is  running! 
Fueling 
Your STIHL chain 
saw  uses an  oil-gasoline mixture for fuel 
(see chapter "Fuel" of your owner's 
manual). 
Warning! 
Gasoline  is  an  extremely 
flammable  fuel.  Use  extreme 
caution 
when  handling gasoline or fuel mix.  Do not smoke 
or bring any fire or flame  near 
the fuel 
(ill.  5). 
Fueling Instructions 
Fuel  your  chain  saw  in  well-ventilated  areas,  outdoors 
only. 
Always 
shut  off  the  engine  and  allow  it  to  cool  before 
refueling. Gasoline 
vapor pressure may build up 
inside the 
gas  tank 
of 
a  two 
cycle 
engine  depending 
on 
the  fuel 
used, the weather 
condition, and the venting system 
of the 
tank.  In order to 
reduce the risk of burns  or other  personal 
injury from 
escaping 
gas vapor 
and fumes, 
remove the gas 
cap 
on 
the  STIHL product  carefully 
so  as  to 
allow  any 
pressure 
build-up  in the tank  to  release slowly.  Never re- 
move fuel filler cap while engine is running. 
Select  bare ground  for  fueling  and 
move 
at  least  10  feet 
(3  m) from fueling spot before starting the engine. Wipe off 
any  spilled  fuel  before 
starting 
your  saw, 
and  check  for 
leakage. 
Check for fuel  leakage  while  refueling  and  during  opera- 
tion.  If fuel  or oil  leakage  is  found, do  not  start 
or run 
the 
engine until  leak is  fixed  and  spilled  fuel 
has been wiped 
away. Tighten the  fuel cap after filling to avoid 
spillage and 
risk of fire. 
Starting 
Warning! 
Your  chain  saw  is  a  one-person  saw.  Do  not  allow other 
persons to be near the  running chain saw. Start  and oper- 
ate  your  saw 
without 
assistance.  For  specific starting in- 
structions, 
see 
the  appropriate  section  of  the  owner's 
manual. Proper starting  methods 
reduce the  risk of injury.  7 
5