Hilti DSH 900-X Mode D'emploi Original page 47

Trouble or fault
The saw doesn't start or is
difficult to start.
Low engine power / poor
cutting performance
*2271384*
Possible cause
Wrong fuel mixture.
Air in the fuel line (no fuel reaching
the carburetor).
The fuel filter is dirty or blocked (no
fuel or too little fuel reaching the
carburetor).
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
Engine compression is too low.
The ambient temperature is too
low.
The spark arrestor or exhaust exit
is clogged.
The decompression valve is stiff to
operate.
Air filter clogged with dirt or dust.
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
Wrong fuel mixture.
The cut-off wheel specification is
unsuitable for the material to be
cut.
Drive belt or cut-off wheel slips.
Engine compression is too low.
2271384
Action to be taken
▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
▶ Remove the air from the fuel
line by operating the fuel pump
several times.
▶ Clean the fuel tank and change
the fuel filter.
▶ Clean the spark plug to remove
carbon deposits.
▶ Check the spark plug electrode
gap and set it correctly.
▶ Change the spark plug.
▶ Check the ignition coil, cable,
plug connections and switch
and change the defective part if
necessary.
▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
▶ Allow the saw to warm up to
room temperature and repeat
the starting procedure.
▶ Clean the spark arrestor or
exhaust exit.
▶ Make sure that the valve
operates freely.
▶ Change the air filter.
▶ Clean the spark plug to remove
carbon deposits.
▶ Check the spark plug electrode
gap and set it correctly.
▶ Change the spark plug.
▶ Check the ignition coil, cable,
plug connections and switch
and change the defective part if
necessary.
▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
▶ Change the cut-off wheel or ask
Hilti Service for advice.
▶ Check that the cut-off wheel is
clamped securely.
▶ Have the product repaired by
Hilti Service.
▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
English 39