Insufficient Lubrication Pressure; Engine Tends To Be Cut-Off At Full Throttle; Engine Tends To Cut-Off At Idle; High Fuel Consumption - PIAGGIO Fly 150 4T Workshop Manual

Fly 125 - 150 4T

Insufficient lubrication pressure

Possible Cause
By-Pass remains open
Oil pump with excessive clearance
Oil filter too dirty
Oil level too low
Engine tends to cut-off at full throttle
THE MOTOR TENDS TO STOP AT MAXIMUM THROTTLE
Possible Cause
Maximum jet clogged
Water or condensate in the carburettor tank
Level in tank too low

Engine tends to cut-off at idle

Possible Cause
Incorrect idle adjustment
Incorrect timing
The starter remains on
Faulty spark plug or incorrect ignition advance
Pressure too low at the end of compression
Minimum nozzle dirty

High fuel consumption

Possible Cause
Air filter blocked or dirty.
Starter inefficient
POOR LUBRICATION PRESSURE
THE ENGINE TENDS TO STOP AT IDLE SPEED
EXCESSIVE FUEL CONSUMPTION
Operation
Check the By-Pass and replace if required. Care-
fully clean the By-Pass area.
Perform the dimensional checks on the oil pump
components
Replace the cartridge filter
Restore the level using the recommended oil type
(Selenia HI Scooter 4 Tech)
Operation
Remove the carburettor, wash with solvent and dry
with compressed air
Remove the tank, wash with solvent and dry with
compressed air
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.
Operation
Adjust using the rpm indicator
Time the system and check the timing system
components
Check: electric wiring, circuit not interrupted, me-
chanical movement and power supply; replace if
necessary
Replace the spark plug or check the ignition circuit
components
Check the thermal group seals and replace worn
components
Wash the nozzle with solvent and dry with com-
pressed air
Operation
Clean according to the procedure
Check: electric wiring, circuit continuity, mechani-
cal sliding and power supply
Troubleshooting
TROUBL - 47