Carburettor Adjustment; Cooling System - McCulloch CS 42S Operator's Manual

3.
4.
discard.
5. Install a new spark plug and tighten securely with
6. Reinstall the spark plug boot.
7. Reinstall the cylinder cover and the three screws.

CARBURETTOR ADJUSTMENT

a WARNING: The chain will be moving
during most of this procedure. Wear your
protective equipment and observe all safety
precautions. The chain must not move at idle
speed.
Indications for idle speed adjustment
The carburetor has been carefully set at the factory.
Adjustments may be necessary if you notice any of the
following conditions:
The chain moves at idle. See IDLE SPEED-T
ADJUSTMENT procedure.
The saw will not idle. See IDLE SPEED-T
ADJUSTMENT procedure.
Idle speed-T adjustment
Allow the engine to idle. If the chain moves, the idle is
too fast. If the engine stalls, the idle is too slow.
Adjust the speed until the engine runs without chain
The idle speed screw is located in the area above the
the engine speed.
decrease the engine speed.

COOLING SYSTEM

To keep the working temperature as low as possible
The cooling system consists of:
Air intake on the starter
Air guide plate
16
Clean the cooling system with a brush after each use,
more often in demanding conditions. A dirty or blocked
cooling system results in the machine overheating
which causes damage to the piston and cylinder.