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9.7 Engine malfunctions
Fault
The engine is hard
to start or does not
start at all.
Engine does not
start or starts poorly
at low tempera-
tures.
Engine does not
crank when oper-
ating the recoil
starter.
The starter rope
does not return to
the initial position
Engine starts up,
but does not run.
The starter does
not switch on or the
engine does not
crank.
Engine stops.
Possible cause
Shut-off device in STOP position
No fuel at the injection pump
Injection nozzle out of order
Incorrect valve clearance
Cylinder or piston rings worn
Paraffin sweats in the fuel due to insuffi-
cient low temperature resistance
Engine oil with wrong SAE viscosity class Changing the engine oil
Recoil starter defective
Spring broken
Recoil starter dirty
Insufficient pretension of the spring
Spring broken
Fuel filter clogged
Fault in the electric system:
n
Battery or other cable connections
not correctly connected.
Cable terminals loose or oxidised.
n
n
Battery defective or not charged.
n
Starter defective.
n
Fuse defective.
Fuel tank empty
Fuel filter clogged
Tank ventilation blocked
Air in the fuel system
Mechanical defect
Troubleshooting – Engine malfunctions
Remedy
Pull the shut-off device gently to move it
to operating position.
Check the fuel level; top up if necessary.
Check the fuel lines.
Check the fuel filter; replace if necessary.
Have it checked by qualified expert per-
sonnel.
Check the valve clearance; adjust if nec-
essary.
Have it checked by qualified expert per-
sonnel.
Use winter-grade fuel
Replace the recoil starter.
Replace the recoil starter.
Clean the recoil starter.
Check the pretension of the spring; adjust
if necessary.
Replace the recoil starter.
Check the fuel filter; replace if necessary.
Check
Check the fuel level; top up if necessary.
Check the fuel filter; replace if necessary.
Ensure sufficient ventilation of the tank.
Check the fuel system for air ingress.
Check the ventilation valve.
Have it checked by qualified expert per-
sonnel.
DRP25D
113
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