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UTC

Lurker
Vespa LX50
Joined: UTC
Posts: 3
Location: Denmark
 
Lurker
Vespa LX50
Joined: UTC
Posts: 3
Location: Denmark
UTC quote
Hello
i have a 2016 Vespa Primavera 50cc 4v 4t 4k km
And i have a problem i just cant figure out so i am hoping you can help
ok when First start the scooter starts up Perfectly . But
after 30 sec it like runs out of fuel and then its a little hard to start up
but after its running and warm it runs perfectly
Now i tell you whats been Done
New Carburetor
Nen intake manafold
new fuel lines
New fuel Vacuum
and there are no fuel leaks on the ground
but its like the fuel lines run dry and the only fuel when i first start is must be in the carb bowl but i don't understand why . any IDEAS ???
UTC

Member
GT 200
Joined: UTC
Posts: 19
Location: Northern Italy
 
Member
GT 200
Joined: UTC
Posts: 19
Location: Northern Italy
UTC quote
Robbie44 wrote:
Hello
i have a 2016 Vespa Primavera 50cc 4v 4t 4k km
And i have a problem i just cant figure out so i am hoping you can help
ok when First start the scooter starts up Perfectly . But
after 30 sec it like runs out of fuel and then its a little hard to start up
but after its running and warm it runs perfectly
Now i tell you whats been Done
New Carburetor
Nen intake manafold
new fuel lines
New fuel Vacuum
and there are no fuel leaks on the ground
but its like the fuel lines run dry and the only fuel when i first start is must be in the carb bowl but i don't understand why . any IDEAS ???
try this :
when the engine manifest the issue, you have to understand if fuel line works, take out the fuel line from carburetor and try to start the engine, look if fuel spill. stop.

if yes, is an electric problem.

spark ? ignition coiil ?
first try to check if the cord between ignition coil and spark plug is firm.
same if the cord is firm in the spark plug.
spark : is it correctly in ?
take a look of the spark electrodes

control that all the wire and ground (-) wires are firmly in position in the engine area.

all items are fallible, brand new too.
UTC

Hooked
2020 primavera 150
Joined: UTC
Posts: 423
Location: Lorton virginia
 
Hooked
2020 primavera 150
Joined: UTC
Posts: 423
Location: Lorton virginia
UTC quote
Try it with the gas cap off
UTC

Hooked
2020 primavera 150
Joined: UTC
Posts: 423
Location: Lorton virginia
 
Hooked
2020 primavera 150
Joined: UTC
Posts: 423
Location: Lorton virginia
UTC quote
Did you happen to put a inline fuel filter on this as I put one on mine when I was having the same type of problems and had to take it back off as it would no keep running?
UTC

Member
GT 200
Joined: UTC
Posts: 19
Location: Northern Italy
 
Member
GT 200
Joined: UTC
Posts: 19
Location: Northern Italy
UTC quote
Harry brenner wrote:
Try it with the gas cap off
correct, if works the vent hose is blocked
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