Adjusting Idle Speed; Spark Arresting Screen* In Muffler; Checking The Spark Plug - Stihl FC 85 Manual De Instrucciones

English / USA

Adjusting Idle Speed

It is usually necessary to change the
setting of the idle speed screw (LA)
after every correction to the low speed
screw (L).
:
Warm up the engine for about 5
minutes.
Engine stops while idling
: Turn idle speed screw (LA) slowly
clockwise until the engine runs
smoothly – cutting blade must not
rotate.
Cutting blade rotates when engine is
idling
: Turn idle speed screw (LA) slowly
counterclockwise until cutting blade
stops rotating and then turn the
screw about another 1/2 to 1 turn in
the same direction.
Erratic idling behavior
:
Turn low speed screw (L) clockwise
(about 1/4 turn) until the engine runs
and accelerates smoothly.
24
Spark Arresting Screen* in
Muffler
If the engine is low on power, check the
spark arresting screen in the muffler.
:
Lift spark arresting screen and pull it
out sideways.
:
Clean spark arresting screen if
necessary.
: If screen is damaged or coked up, fit
a new one.
:
Refit the spark arresting screen.
* see "Guide to Using this Manual"

Checking the Spark Plug

Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition of
the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
FC 85