9.2 Engine malfunctions
Malfunction
Possible cause
Remedy
Engine does not
start
Fuel tank empty
Check, fill up if necessary
Fuel valve closed
Open the fuel valve
Fuel system clogged
Clean the fuel screen
Check the fuel screen in the carburettor
Have checked by qualified expert per-
sonnel
Set the starter switch to “OFF” position
Set the starter switch to “ON” position
Engine oil level too low
Check the engine oil level, correct if nec-
essary
No ignition spark
Clean the spark plug, replace if neces-
sary
Starter switch defective
Have checked by qualified expert per-
sonnel
No fuel in carburettor
Check the fuel supply
Have checked by qualified expert per-
sonnel
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
Low engine power
Air filter clogged
Clean the air filter, replace if necessary
Throttle cable defective
Have checked by qualified expert per-
sonnel
Engine defective
Have checked by qualified expert per-
sonnel
Carburettor defective
Have checked by qualified expert per-
sonnel
Engine overheats
Lack of cooling air
Clean the air filter, replace if necessary
Cleaning the cooling fins and the cooling
air intake openings
Engine stops
Fuel system clogged
Clean the fuel screen
Check the fuel screen in the carburettor
Have checked by qualified expert per-
sonnel
Fuel tank empty
Check, fill up if necessary
Troubleshooting – Engine malfunctions
BVP 12/50 A
103
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