Fayat DYNAPAC DRP20D, Operating Instruction, Page: 95 / 102

9.2 Engine faults
Fault Possible cause Remedy
No or poor starting
of engine
Fuel tank empty Check the fuel level, top up if necessary
Fuel filter clogged Check the fuel filter, replace if necessary
Fuel lines leaking Check the fuel lines
Incorrect valve clearance Check, adjust the valve clearance
Wear on cylinder or piston rings Have checked by qualified expert per-
sonnel
Injection nozzle out of order Have checked by qualified expert per-
sonnel
Engine does not
start or starts poorly
at low temperatures
Fuel filter clogged by paraffin separation Change the fuel filter, use winter fuel
Engine oil with wrong SAE viscosity class Change the engine oil
Engine does not
crank when oper-
ating the recoil
starter
Recoil starter defective Replace the recoil starter
Spring broken Replace the recoil starter
Starter rope of
recoil starter does
not return to initial
position
Recoil starter dirty Clean the recoil starter
Insufficient pre-tension of the spring Check the pre-tension of the spring,
adjust if necessary
Spring broken Replace the recoil starter
Engine ignites, but
does not run
Fuel filter clogged Check the fuel filter, replace if necessary
Engine stops Fuel tank empty Check the fuel level, top up if necessary
Fuel filter clogged Check the fuel filter, replace if necessary
Tank ventilation blocked Ensure sufficient ventilation of the tank
Air in the fuel system Check the fuel system for air leaks.
Check the ventilation valve .
Mechanical defect Have checked by qualified expert per-
sonnel
Engine looses
power and speed
Fuel tank empty Check the fuel level, top up if necessary
Fuel system clogged Check the fuel filter, replace if necessary
Tank ventilation blocked Ensure sufficient ventilation of the tank
Air in the fuel system Check the fuel system for air leaks.
Check the ventilation valve .
Engine looses
power and speed,
black exhaust
smoke
Air filter dirty Clean, replace if necessary
Incorrect valve clearance Check, adjust the valve clearance
Injection nozzle out of order Have checked by qualified expert per-
sonnel
Troubleshooting – Engine faults
DRP20D 95