Cleaning The Air Filter; Adjusting The Carburetor; Checking The Spark Plug - Stihl HS 46 Instruction Manual

English

Cleaning the Air Filter

If there is a noticeable loss of engine
power
2
1
Loosen the captive screw (1) and
N
remove the filter cover (2).
Clean away loose dirt from around
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the filter.
Remove the filter element (3).
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Fit a new filter element. As a
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temporary measure you can knock it
out on the palm of your hand or blow
it out with compressed air. Do not
wash.
Replace any damaged parts.
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Fit the filter element (3).
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Fit the filter cover (2) and screw it
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down firmly.
14

Adjusting the Carburetor

The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
L H
LA
Start and warm up the engine.
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Engine stops while idling
Turn the idle speed screw (LA)
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clockwise until the cutting blades
begin to run – then back it off
about 1 full turn.
Cutting blades run when engine is idling
Turn the idle speed screw (LA)
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counterclockwise until the cutting
blades stop moving – then turn it
about another full turn in the same
direction.
WARNING
If the cutting blades continue to run while
the engine is idling, have your power tool
checked and repaired by your servicing
dealer.

Checking the Spark Plug

If the engine is down on power,
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difficult to start or runs poorly at idle
speed, first check the spark plug.
Fit a new spark plug after about 100
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operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the Spark Plug
Stopping the Engine
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Carefully pry open the flap (1) with a
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suitable tool (e.g. combination
wrench).
HS 46, HS 46 C, HS 56 C