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9.5 Engine malfunctions
Malfunction
No or poor starting
of engine
Engine does not
start or starts poorly
at low temperatures
Engine does not
crank when oper-
ating the recoil
starter
Starter rope of
recoil starter does
not return to initial
position
Engine ignites, but
does not run
The starter does
not switch on or the
engine does not
crank.
Engine stops
Engine looses
power and speed
Possible cause
Fuel tank empty
Fuel filter clogged
Fuel lines leaking
Incorrect valve clearance
Wear on cylinder or piston rings
Injection nozzle out of order
Fuel filter clogged by paraffin separation
Engine oil with wrong SAE viscosity class Change the engine oil
Insufficiently charged battery
Recoil starter defective
Spring broken
Recoil starter dirty
Insufficient pre-tension 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
Fuel tank empty
Fuel system clogged
Troubleshooting – Engine malfunctions
Remedy
Check the fuel level, top up if necessary
Check the fuel filter, replace if necessary
Check the fuel lines
Check, adjust the valve clearance
Have checked by qualified expert per-
sonnel
Have checked by qualified expert per-
sonnel
Change the fuel filter, use winter fuel
Check the battery or have it checked by
qualified expert personnel
Replace the recoil starter
Replace the recoil starter
Clean the recoil starter
Check the pre-tension 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 leaks.
Check the ventilation valve.
Have checked by qualified expert per-
sonnel
Check the fuel level, top up if necessary
Check the fuel filter, replace if necessary
DRP40DX
103
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