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UTC

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Vespa LX 150
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Hi, looking for a little help here. I have a 2012 Vespa LX 150 that sat dormant for a few years. Trying to get it running again. The following is a list of things I have done:

1. New battery, fully charged
2. New gas, tank was bone dry when I got it
3. Changed engine oil
4. Checked hub oil level
5. Turned key to On position, Code light blinked once then went out, engine light went out.
6. Kickstand up (kill switch disengaged), brake handle pulled in, hit start switch.
7. Engine turned over for 5 seconds but didn't catch. At least ten attempts, if not more.
8. Checked spark plug for moisture, there was none. Checked it for spark, very good spark.
9. Put it back together, sprayed starter fluid in air filter.
10. Engine started and ran for about 6 seconds. Did this 3 times.
11. Made sure battery charge was good and attempted normal start another handful of times with no joy.

This model Vespa does not have a carburetor, it is fuel injected. I have been unable to find anything online referring to fuel injected Vespas, and I have been searching for 2 days now. Any help would be greatly appreciated.
⚠️ Last edited by SandBoney on UTC; edited 1 time
@berto avatar
UTC

Molto Verboso
2006 LX150 (carbed) | 2007 GT200
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Molto Verboso
@berto avatar
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UTC quote
Sure sounds like fuel. The good news is you're pretty close, I think!

The wiki has a link to workshop manuals: Workshop Manuals

I think you will want the "150ie" models (where ie designates fuel injection)
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Hooked
2020 primavera 150
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UTC quote
Add some sea foam to the gas
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Add some Sea Foam to possibly clean the injector?
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Also, thanks berto, that manual site is pretty much what I have been looking for. I'm about to partake in some irregular trouble shooting steps.
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Hooked
2020 primavera 150
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Add sea foam (parts store or Walmart ) to gas tank may help .You do not need much.
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Thanks Harry, I was thinking either that, or Mechanic in a Bottle. It's a real thing, I have used it before with some pretty good results.
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UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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UTC quote
Worth cleaning the throttle body idle bypass as well:

https://cheekythoma3.wixsite.com/itsme/idle

Don't twist the throttle while you try to start.
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Veni, Vidi, Posti
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Putting magic sauce in the fuel tank isn't going to make gas get into the combustion chamber, and that sounds like the problem. Is the fuel pump cycling on when you turn the key? If so, check to see if the injector is working. If not, troubleshoot that first.
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The fuel pump sounds like it is working when I turn the key to On. Going to check tomorrow to see if fuel actually comes out of the hose connected to the injector. Probably going to be messy. Facepalm emoticon
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Hooked
2020 primavera 150
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I do not believe they had issues with the fuel pump on these
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Good news is, pump works just fine. Bad news is, I neglected to think about the state of the fuel in the line, it smelled absolutely awful. I'm going to try and devise a way to cycle the pump about a dozen more times, without making so much of a mess, then pull the injector and give it a good cleaning. I'll update when I get the chance. Thanks for all the help so far.
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Veni, Vidi, Posti
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Motovista wrote:
Putting magic sauce in the fuel tank isn't going to make gas get into the combustion chamber, and that sounds like the problem. Is the fuel pump cycling on when you turn the key? If so, check to see if the injector is working. If not, troubleshoot that first.
Agreed - Seafoam is a joke in this or most situations. The stuff was made for two stroke marine engines back in the day. Made with naptha, pale oil, and anything else that was lying around. Meanwhile, I think you have the right idea - pull the injector, check it for good spray and replace the wonky fuel in there.
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I guess that is why we buy it in 10 gallon containers and put it most of the outboards at this marina in Aquia Va
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UTC quote
Wonky fuel has been purged without setting my garage on fire. Now just working on some liquid courage to pull and clean the injector. Kind of a noob at this. Any tips on how to clean the injector?
@berto avatar
UTC

Molto Verboso
2006 LX150 (carbed) | 2007 GT200
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Molto Verboso
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UTC quote
SandBoney wrote:
Any tips on how to clean the injector?
This might be relevant and helpful

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Hooked
2020 primavera 150
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Great info berto
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Perfect berto, thanks a ton.
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UTC quote
Thanks for all the help. Injector cleaned out and started right up. Already took it for a spin around the block. Now I just have to give it a bath and good as new.

Quick recap: 2012 Vespa 156 km (not a typo), hadn't been started since at least 2018. Now runs like it's just come off the showroom floor. Thanks again for all the help.
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Hooked
2020 primavera 150
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Great news.I would change the hub oil when you get a chance.
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Veni, Vidi, Posti
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Good man. Check the oil levels, tire pressure, etc... Enjoy.
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Hooked
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One more item—- change brake fluid.
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