Hilti DSH 700 - Troubleshooting

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Trouble or fault Possible cause Action to be taken
The saw doesn’t start or is
difficult to start.
DSH 700
DSH 900
The engine is flooded (spark plug
wet).
▶ Remove the spark plug, dry the
plug and allow the cylinder to
dry out.
▶ Disengage the choke lever and
repeat the starting procedure
several times.
DSH 700-X
DSH 900-X
The engine is flooded (spark plug
wet).
▶ Remove the spark plug, dry the
plug and allow the cylinder to
dry out.
Wrong fuel mixture. ▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
Air in the fuel line (no fuel reaching
the carburetor).
▶ Remove the air from the fuel
line by operating the fuel pump
several times.
The fuel filter is dirty or blocked (no
fuel or too little fuel reaching the
carburetor).
▶ Clean the fuel tank and change
the fuel filter.
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
▶ 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.
Engine compression is too low. ▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
The ambient temperature is too
low.
▶ Allow the saw to warm up to
room temperature and repeat
the starting procedure.
The spark arrestor or exhaust exit
is clogged.
▶ Clean the spark arrestor or
exhaust exit.
The decompression valve is stiff to
operate.
▶ Make sure that the valve
operates freely.
Low engine power / poor
cutting performance
Air filter clogged with dirt or dust. ▶
Change the air filter.
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
▶ 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.
Wrong fuel mixture. ▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
The disc specification is unsuitable
for the material to be cut.
▶ Change the cutting disc or ask
Hilti Service for advice.
Printed: 24.04.2018 | Doc-Nr: PUB / 5265931 / 000 / 02