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@davids_allstate avatar
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'61 Allstate / Vespa VNA with a '69 veloce 150
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Location: North Carolina USA
 
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@davids_allstate avatar
'61 Allstate / Vespa VNA with a '69 veloce 150
Joined: UTC
Posts: 877
Location: North Carolina USA
UTC quote
Hiya everyone!

Since cleaning out my tank and carb for the season, I have to put some gas in the carb manually or starter fluid in the spark plug hole to get my VLB engine running. Runs good until I shut it off, then it is difficult to start back up.
The carb box is usually filled with fuel and I remove the rubber plug to let it spill out onto a shop rag.

Any suggestions?

Cheers!
@xantufrog avatar
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1980 P200E - "Old Rusty", 1976 ET3 Primavera
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Posts: 8892
Location: Atlanta, GA
 
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@xantufrog avatar
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: UTC
Posts: 8892
Location: Atlanta, GA
UTC quote
sounds like two problems: your tap isn't stopping fuel flow to your carb when you turn it off (you're turning if off, right?), and your carb float needle isn't stopping that fuel from from flooding.
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@davids_allstate avatar
UTC

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'61 Allstate / Vespa VNA with a '69 veloce 150
Joined: UTC
Posts: 877
Location: North Carolina USA
 
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'61 Allstate / Vespa VNA with a '69 veloce 150
Joined: UTC
Posts: 877
Location: North Carolina USA
UTC quote
Yes, I did forget to once turn off the valve. I need to turn it off and let the engine die.
Is there a way to check the Float needle seating?
@xantufrog avatar
UTC

Moderibbit
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: UTC
Posts: 8892
Location: Atlanta, GA
 
Moderibbit
@xantufrog avatar
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: UTC
Posts: 8892
Location: Atlanta, GA
UTC quote
I found this thread full of ideas: SI Carb Float Testing

IMO that's a lot of work though and the answer is you know it's leaking since in principle you should be able to leave the tap on and it won't flood. I'd probably replace it since it's a cheap part and they do go bad anyway. But you could check and see if it's got scuz on the tip or the seat in the carb and clean those first
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@davids_allstate avatar
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'61 Allstate / Vespa VNA with a '69 veloce 150
Joined: UTC
Posts: 877
Location: North Carolina USA
 
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@davids_allstate avatar
'61 Allstate / Vespa VNA with a '69 veloce 150
Joined: UTC
Posts: 877
Location: North Carolina USA
UTC quote
thank you very much!
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