OP
UTC

Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
 
Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
UTC quote
Hi,

Looking for some advice, much appreciated.

My 300 Supertech is refusing to start.

Turn on the key, and fuel pump primes, then just a click.

Measured the voltage on the batery at 12.6v

I am assuming that the starter relay is the issue here.

Does it live underneath all the floorboards? Do I need to take the door panel and floor board off to access the relay.

Any advice appreicated.
@old_as_dirt avatar
UTC

Veni, Vidi, Posti
2007 GTS
Joined: UTC
Posts: 23105
Location: Harriman, Tennessee, Tn
 
Veni, Vidi, Posti
@old_as_dirt avatar
2007 GTS
Joined: UTC
Posts: 23105
Location: Harriman, Tennessee, Tn
UTC quote
don't assume its the solenoid.

pull the battery and have it load tested first, just because your meter says its 12.6 v doesn't make it a good battery.

voltage is just the transmission side of the battery, the working side is the Amperage.
OP
UTC

Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
 
Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
UTC quote
Tested the battery under load, barely drops to about 12.3v.

My neighbour who is a retired electrical engineer, then tested the relay. He confirmed that the relay is faulty.

Got a replacement on order.
OP
UTC

Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
 
Member
Vespa 300 Super Tech 2022
Joined: UTC
Posts: 49
UTC quote
Fitted the new starter solenoid.

Fired up instantly.

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