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Vintage Vespa Forum

P200E Fuel Issue?

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rockandride6 Chris N
Santa Clara, CA, USA   USA
Hey all! I have a 1979 Vespa P200E that I am having some issues with. It used to be a reliable runner but had started getting hard to start and now won't start at all. If I am lucky I can get it to start (maybe every 25 kicks) but it dies within a few seconds.

I just removed the Exhaust and decarbonised the cylinder, so that should help (it was a bit messy in there) but the scooter was in my garage overnight and I came out to the smell of gas. The fuel petcock is in the OFF position but there was a considerable amount of fuel that came out through the exhaust (header and muffler still off). I remember there was some fuel in the muffler when I took it off, but I'd assumed it was due to trying to start it.

So, my questions are:

A. is this as simple as a bad petcock?
B. if it is a petcock, what else could be a problem? Maybe a stuck float?
C. What else could it be?
D. Is the petcock easily replaceable/accessible? Do they often need replaced or can they be adjusted/fixed?

Thanks so much! A bit of urgency here, but any advice is much appreciated.

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