VESPA LX 125 4T Euro 3, Руководство по обслуживанию станции

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Possible Cause Operation
Start-up enabling buttons failure Check continuity using an Ohm meter, with the switch pressed;
replace if necessary
Carburettor nozzles clogged or dirty Dismantle, wash with solvent and dry with compressed air
Air filter obstructed or dirty. Remove the sponge, wash with water and car shampoo, then
soak it in a mixture of 50% petrol and 50% specific oil. Press
with your hand without squeezing, allow it to drip dry and refit.
Fuel pump fault Check the pump control device
Excessive oil consumption/Exhaust smoke
EXCESSIVE OIL CONSUMPTION/SMOKY EXHAUST
Possible Cause Operation
Worn valve guides Check and replace the head unit if required
Worn valve oil guard Replace the valve oil seal
Oil leaks from the couplings or from the gaskets Check and replace the gaskets or restore the coupling seal
Worn or broken piston rings or piston rings that have not been
fitted properly
Replace the piston cylinder unit or just the piston rings
Insufficient lubrication pressure
POOR LUBRICATION PRESSURE
Possible Cause Operation
By-Pass remains open Check the By-Pass and replace if required. Carefully 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 adding the recommended oil type
Engine tends to cut-off at full throttle
THE ENGINE TENDS TO STOP AT MAXIMUM THROTTLE
Possible Cause Operation
Maximum jet clogged Remove the carburettor, wash with solvent and dry with com-
pressed air
Water or condensation in the carburettor chamber Remove the tank, wash with solvent and dry with compressed
air
Level in chamber too low Restore the level in the chamber by bending on the float the
thrusting reed of the petrol intake rod so as to have the float
parallel to the chamber 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, mechanical
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 compressed air
Troubleshooting
Vespa LX 125 - 150 4T Euro 3
TROUBL - 36