Wed Jun 22, 2022 10:02 pm

Member
1979 Vespa P200e, 2010 Genuine Stella 4T (RIP)
Joined: 17 Dec 2012
Posts: 5
Location: Martinez, CA
 
Member
1979 Vespa P200e, 2010 Genuine Stella 4T (RIP)
Joined: 17 Dec 2012
Posts: 5
Location: Martinez, CA
Wed Jun 22, 2022 10:02 pm linkquote
Hey Gang,

I've been a member of the forum since I bought my Stella 4T back in 2012, but it recently went kaput and I just got a new ride.

I took it to the shop after I bought it and had them go through and fix a bunch of stuff, I rode it all over San Francisco and it ran great.

They delivered it to my house today and when I went to kick it, it wouldn't start. Gas was off before I turned it on, but it smelled flooded. Turned the gas off and kicked it a bunch, it eventually started.

I took it for a ride and when I came back I turned the gas off and let it run until it ran out of gas.

Somehow, despite the gas being off, the entire garage stinks of gas and is actually permeating through into the house. There's no gas on the ground, so it doesn't appear to be leaking. We had two stroke dirt bikes growing up and it was never this bad.

Any thoughts on why the insanely strong gas smell and why the engine seemed to be flooded?

Thanks!
Thu Jun 23, 2022 12:04 am

Addicted
PX 200
Joined: 25 May 2016
Posts: 750

 
Addicted
PX 200
Joined: 25 May 2016
Posts: 750

Thu Jun 23, 2022 12:04 am linkquote
I would check the fuel tap for leaks…

most likely it's collecting in the frame and evaporating before it hits the floor.

The fuel tap has a habit of failing (usually the rubber gasket separating on/off, and reserve), especially if it's been sat around for a year or so…

The next area to check is the fuel line for cracks. After that to make sure the carb float valve is closing. If it doesn't close, the fuel will fill the carb box.
Thu Jun 23, 2022 6:49 am

Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '04 Ninja 250
Joined: 04 Apr 2013
Posts: 5993
Location: San Diego, CA
 
Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '04 Ninja 250
Joined: 04 Apr 2013
Posts: 5993
Location: San Diego, CA
Thu Jun 23, 2022 6:49 am linkquote
+1 for tap leak and / or float leak, probably been sitting and the rubber is shot from ethanol or age
Thu Jun 23, 2022 5:56 pm

Addicted
Joined: 29 Nov 2020
Posts: 902
Location: Los Angeles
 
Addicted
Joined: 29 Nov 2020
Posts: 902
Location: Los Angeles
Thu Jun 23, 2022 5:56 pm linkquote
Magnato1 wrote:
Any thoughts on why the insanely strong gas smell and why the engine seemed to be flooded?

Thanks!
Flooded maybe from the needle jangling under vibration or leaned over on the trip home.

They smell!
Breather holes are needed to allow air into the tank. Cover the gas cap holes with tape* to see if still wreaks. You're issue could be any number of things otherwise, but I'd start there.
*Don't forget you did that before you ride.
Fri Jun 24, 2022 8:10 am

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: 04 Jul 2011
Posts: 1314
Location: Tucson, AZ
 
Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: 04 Jul 2011
Posts: 1314
Location: Tucson, AZ
Fri Jun 24, 2022 8:10 am linkquote
If you are closing the gas and it still smells like a lot of gas there is only one point to narrow it down. It is your fuel tab below the gas tank.

Another issue could be the rubber seal between the gas tank and the fuel tab. Like someone is saying, you are not seeing the fuel leak because it is likely leaking under neat the seat and on to the tray.
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