Adjusting The Carburetor; Spark Plug - Stihl KM 94 R Manual De Instrucciones

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Adjusting the Carburetor

The carburetor of the machine has been
adjusted for optimum performance and
fuel efficiency in all operating states at
the factory.
Setting the idle speed
Engine stops when idling
Slowly turn idle speed screw (LA)
N
clockwise until the engine runs
smoothly – the working tool must not
move along
Working tool turns when idling
Turn the idle speed adjusting
N
screw (LA) slowly counterclockwise
until the working tool stops turning
WARNING
If the working tool continues to keep
rotating in idle even after adjustment,
have the power tool checked by a
servicing dealer.
16

Spark Plug

If there is a loss of engine power, the
machine is difficult to start or runs poorly
at idle, first check the spark plug.
Install a new spark plug after approx.
100 operating hours or earlier if the
electrodes are eroded/corroded.
The 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 degrade performance.
Removing the spark plug
2
1
Turn screw (1) in cap (2) until cap
N
can be removed
Lay down cap
N
3
Pull off the spark plug boot (3)
N
Unscrew spark plug,
N
Checking the Spark Plug
Clean dirty spark plug.
N
Check electrode gap (A) and
N
readjust if necessary – see chapter
"Specifications."
Use only resistor type spark plugs of
N
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.
A
KM 94 R