Spark Arresting Screen In Muffler; Checking The Spark Plug - Stihl HT 73 Manual De Instrucciones. Manual Del Usuario

english / USA
Engine stops while idling
:
Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the chain must not
rotate.
Chain runs when engine is idling
:
Turn the idle speed screw (LA)
counterclockwise until chain stops
running and then turn the screw
about another two full turns in the
same direction from that position.
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Spark Arresting Screen in
Muffler
If the engine is low on power, check the
spark arresting screen in the muffler.
:
Pull the spark arresting screen off
the stub.
: Clean spark arresting screen if
necessary. If screen is damaged or
coked up, fit a new one.
:
Push the spark arresting screen on
to the stub.

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.
HT 73