Insufficient lubrication pressure
POOR LUBRICATION PRESSURE
Possible Cause Operation
By-Pass remains open Check the By-Pass and replace if required. Care-
fully clean the By-Pass area.
Oil pump with excessive clearance Perform the dimensional checks on the oil pump
components
Oil filter too dirty Replace the cartridge filter
Oil level too low Restore the level using the recommended oil type
(Selenia HI Scooter 4 Tech)
Engine tends to cut-off at full throttle
THE MOTOR TENDS TO STOP AT MAXIMUM THROTTLE
Possible Cause Operation
Maximum jet clogged Remove the carburettor, wash with solvent and dry
with compressed air
Water or condensate in the carburettor tank Remove the tank, wash with solvent and dry with
compressed air
Level in tank too low Restore the level in the tank by bending on the float
the thrusting reed of the petrol inlet rod so as to
have the float parallel to the tank level with the
carburettor inverted.
Engine tends to cut-off at idle
THE ENGINE TENDS TO STOP AT IDLE SPEED
Possible Cause Operation
Incorrect idle adjustment Adjust using the rpm indicator
Incorrect timing Time the system and check the timing system
components
The starter remains on Check: electric wiring, circuit not interrupted, me-
chanical movement and power supply; replace if
necessary
Faulty spark plug or incorrect ignition advance Replace the spark plug or check the ignition circuit
components
Pressure too low at the end of compression Check the thermal group seals and replace worn
components
Minimum nozzle dirty Wash the nozzle with solvent and dry with com-
pressed air
High fuel consumption
EXCESSIVE FUEL CONSUMPTION
Possible Cause Operation
Air filter blocked or dirty. Clean according to the procedure
Starter inefficient Check: electric wiring, circuit continuity, mechani-
cal sliding and power supply
Fly 125 - 150 4T Troubleshooting
TROUBL - 47
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