MAINTENANCE ON CHASSIS AND ENGINE 140
9.85Carburetor - idle
301826-10
The idle setting of the carburetor has a big influence on the starting behavior, stable idling
and the response to throttle opening. That means that an engine with a correctly set idle
speed is easier to start than if the idle is set wrongly.
Info
The carburetor and its components are subject to increased wear caused by engine
vibration. Wear can result in malfunctioning.
If the idle speed is set significantly higher, the engine does not start. When the elec-
tric starter button is activated, the electric starter turns over the engine, but the
engine does not start because there is no ignition spark.
The idle speed is adjusted with the adjustment screw .
The idle mixture is adjusted with the idle mixture adjustment screw .
9.86Carburetor - adjusting idle x
301826-10
– Screw in the idle adjusting screw until it stops and then to the prescribed basic set-
ting.
Guideline
Idle mixture adjusting screw
Open 1.5 turns
Adjustment tool for mixture control screw (59029034000)
– Run the engine until warm.
Guideline
Warm-up time ≥ 5 min
– Adjust the idle speed with the adjusting screw .
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