Insufficient Lubrication Pressure - PIAGGIO Vespa LX 150 4T Euro 3 Service Station Manual

Vespa LX 125 - 150 4T Euro 3
Possible Cause
Faulty spark plug or incorrect ignition advance
- Engine flooded.
Incorrect valve sealing or valve adjustment
Rpm too low at start-up or engine and start-up
system damaged
Altered fuel characteristics
Vacuum operated cock failure
Failing automatic starter on the carburettor
Start-up enabling buttons failure
Carburettor nozzles clogged or dirty
Air filter obstructed or dirty.
Fuel pump fault
Excessive oil consumption/Exhaust smoke
EXCESSIVE OIL CONSUMPTION/SMOKEY EXHAUST
Possible Cause
Worn valve guides
Worn valve oil guard
Oil leaks from the couplings or from the gaskets Check and replace the gaskets or restore the cou-
Worn or broken piston rings or piston rings that
have not been fitted properly

Insufficient lubrication pressure

Possible Cause
By-Pass remains open
Oil pump with excessive clearance
Oil filter too dirty
Oil level too low
service charging it for eight hours at a current of
Replace the spark plug or check the ignition circuit
Try starting-up with the throttle fully open. If the
engine fails to start, remove the spark plug, dry it
and before refitting, make the motor turn so as to
expel the fuel excess taking care to connect the
cap to the spark plug, and this in turn to the ground.
If the fuel tank is empty, refuel and start up.
Inspect the head and/or restore the correct clear-
Check the starter motor and the kick-starter unit
Drain off the fuel no longer up to standard; then,
Check that fuel is adequately supplied through the
pipe by applying a vacuum to the suction pipe
Check the electrical wiring and mechanical move-
Check continuity using an Ohm meter, with the
Dismantle, wash with solvent and dry with com-
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
Replace the piston cylinder unit or just the piston
POOR LUBRICATION PRESSURE
Check the By-Pass and replace if required. Care-
Perform the dimensional checks on the oil pump
Restore the level adding the recommended oil
Operation
1/10 of the capacity of the battery itself
components
ance
refill
ment, replace if necessary.
switch pressed; replace if necessary
pressed air
squeezing, allow it to drip dry and refit.
Check the pump control device
Operation
Check and replace the head unit if required
Replace the valve oil guard
pling seal
rings
Operation
fully clean the By-Pass area.
components
Replace the cartridge filter
type
Troubleshooting
TROUBL - 3