Assembly; Carburettor Settings - Husqvarna 123HD60 Workshop Manual

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Fuel system

Assembly

Check the distance piece for cracks.
A defective distance piece must be re-
placed.
Make sure that the impulse channel is
entirely open.
Use new gaskets when assembling.
Screw the distance piece back onto the
cylinder.
Connect the fuel hoses.
Put the carburettor gasket on the protec-
tive plate (A).
Place the air fi lter holder and the screws
on the carburettor and tighten them.
Connect the throttle cable (B).
502 71 14-01
501 60 02-03
Assembly
Inspect the distance piece (A) for cracks
that can cause starting problems and neg-
ative idling. Check also that the impulse
channel (B) is open and not completely or
partly blocked with grease, for instance, or
that the gaskets do not fi t correctly. This
also applies the impulse channel in the
cylinder.
A defective distance piece must be re-
placed.
Use new gaskets when assembling.
Screw the distance piece back onto the
cylinder.
Do not forget the bracket for the short-
circuit cable!
Put the gasket and protective plate in
place.
Connect the fuel hoses to the carburettor.
Place the gasket (A) on the protective
plate and fasten it with a little grease.
Place th air fi lter holder and the carburet-
tor screws on the carburettor and put it in
place.
Screw the carburettor in place.
Connect the throttle cable (B).

Carburettor settings

The carburettor's job is to deliver a combustible mixture of air
and gasoline to the cylinder.
The amount of this mixture is controlled with the throttle.
The carburettor has only one adjustment setting, namely the
idle speed setting.
Setting idle speed:
1. Run the engine warm for about 4 minutes at 9,500–
10,000 rpm.
2. If the idle speed exceeds 3,700 rpm it can be lowered by
turning the idle screw (T) anticlockwise.
3. Adjust the idle speed to 2,800 – 3,100 rpm.