37
MS 191 T
English / USA
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
:
Remove spark plug – see “Starting /
Stopping the Engine“.
:
Clean dirty spark plug.
:
Check electrode gap
(A)
and
readjust if necessary – see
"Specifications".
:
Use only resistor type spark plugs
of the approved range.
Rectify problems which have caused
fouling of spark plug:
:
Too much oil in fuel mix.
:
Dirty air filter.
:
Unfavorable running conditions,
e.g. operating at part load.
Fit a new spark plug after approx.
100 operating hours
or earlier if the electrodes are badly
eroded.
To reduce the risk of fire and burn
injury, use only spark plugs
authorized by STIHL. Always press
spark plug boot
(2)
snugly onto
spark plug terminal
(1)
of the proper
size. (Note: If terminal has
detachable SAE adapter nut, it must
be attached.)
A loose connection between spark
plug boot and ignition wire
connector in the boot may create
arcing that could ignite combustible
fumes and cause a fire.
:
Unscrew the oil tank filler cap and
drain the tank.
:
Unscrew the fuel tank filler cap and
drain the tank.
:
Always store chain oil and fuel mix
in approved safety-type canisters.
:
Remove screws from fan housing,
hand guard and front handle.
:
Lift away the fan housing.
:
Tension the starter rope or rewind
spring or replace as necessary.
0
00BA036 TR
1
Replacing Starter Rope /
Rewind Spring
Summary of Contents for MS 191 T
Page 53: ...52 English USA MS 191 T...
Page 105: ...104 espa ol EE UU MS 191 T...
