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BV 350
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BV 350
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Hi, I own a 2017 BV 350. When I turn the ignition on the fuel needle moves all the way to the right (Full) but then goes all the way to the left (empty)and remains there and the fuel light blinks continually. I know for sure there is a full tank of gas. I was wondering if anyone else had this problem and what their remedy was. Thank you
@petercc avatar
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Location: Belgium
 
Molto Verboso
@petercc avatar
Piaggio Beverly 300 ie - 2012
Joined: UTC
Posts: 1231
Location: Belgium
UTC quote
35Chief wrote:
Hi, I own a 2017 BV 350. When I turn the ignition on the fuel needle moves all the way to the right (Full) but then goes all the way to the left (empty)and remains there and the fuel light blinks continually. I know for sure there is a full tank of gas. I was wondering if anyone else had this problem and what their remedy was. Thank you
Did you experience gradually a problem with the fuel level? I mean after filling up not at max and then gradually after every fill up lower? Then it could be a leaky fuel tank float.
If it happened from one moment to the next then probably there is a problem with the sender.
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BV 350
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Hi, Thank you for responding to my problem. It happened going from 1 fill up to the next. One day the fuel gauge worked as it should and the very next day it exhibited the problems I described. What is involved in dealing with the sender ?
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Posts: 1231
Location: Belgium
 
Molto Verboso
@petercc avatar
Piaggio Beverly 300 ie - 2012
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Posts: 1231
Location: Belgium
UTC quote
35Chief wrote:
Hi, Thank you for responding to my problem. It happened going from 1 fill up to the next. One day the fuel gauge worked as it should and the very next day it exhibited the problems I described. What is involved in dealing with the sender ?
So you found the problem from one day to the very next. Not after a refill?

The sender and the fuel float are one part. It is a tube like part in front of the filler cap underneath the center body work of the BV 350. Robot from San Diego explains you how to remove the body work on a BV 350
I think it is not an easy job. You can use your trip counter as an alternative.
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BV 350
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BV 350
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Hi, What happened was that after a previous days ride on the next day I just topped off the tank and when I started the bike that was when the fuel gauge problem surfaced. I have run down the tank a few times since and refilled it but that has not changed things. Thank you for the video, it does appear much more than I would want to get into trying to get at the sender.
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Location: Belgium
 
Molto Verboso
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Piaggio Beverly 300 ie - 2012
Joined: UTC
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Location: Belgium
UTC quote
So it was after a refill. That does not sound as a problem with the sender. Maybe the float is for some reason blocked down in the tube?

Anyway, if you want to solve it you will have to get to the fuel tank.
Which is quite a job, indeed, and also not something that I would do just like that.

Or you have it solved, or you use the trip counter.
You have quite a good idea how long you do with a full tank of fuel, I am sure.

From my tanking data I see that I fill up the tank on average every 285km. Between 270 and 310km. I fill up typically not long after the fuel warning light goes on, although the BV will easily do 350km on a full tank.
So with a broken fuel gauge I would put 300km forward as the point to refill my BV.

Your BV 350 has the same tank but will maybe consume a bit more than my BV which is a 300.
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Veni, Vidi, Posti
2019 GTS300 Supertech E3 59,000km
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Location: Batmania aka Melbourne, Australia
 
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2019 GTS300 Supertech E3 59,000km
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UTC quote
Could it be an issue with the fuel evap canister? Common issue on Vespas
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Moderatus Rana
MP3 250 and 2 MP3 500s
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Moderatus Rana
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UTC quote
steelbytes wrote:
Could it be an issue with the fuel evap canister? Common issue on Vespas
While I haven't heard of this particular problem being caused by the evap crap it is still worth removing anyway do to other problems it can create.
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BV 350
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Hi Fellow travelers in the world of scooters. Thank you for the ideas. I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
@petercc avatar
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Location: Belgium
 
Molto Verboso
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Piaggio Beverly 300 ie - 2012
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UTC quote
35Chief wrote:
Hi Fellow travelers in the world of scooters. Thank you for the ideas. I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
The most simple way to check that is by starting your engine with the fuel tank open, so with the filling cap off. Then there cannot be an evaporation problem.

Do not drive the scooter like that, fuel will spill over, just have the engine running with the scooter on the center stand and check the gauge.

I expect it will not make a difference. But I could be wrong, off course.
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BV 350
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BV 350
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Hi, I will try removing the cap and see what happens. I did do a search on Modern Vespa.com and did come up with great information and photos on how to remove the evap. canister on a BV 350
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Veni, Vidi, Posti
2007 LX150 2015 GTS (on the bench) 2017 BV 350
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Location: Fond du Lac, Wisconsin
 
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35Chief wrote:
Would there be any negative side-effects to the bike if I do this ?
Nope.
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Veni, Vidi, Posti
GT 2.4
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Have someone hold the bike up, pick the rear up about 8 inches to a foot and drop it. Do it a couple times. Or ride it off a couple curbs. I've seen this jar a stuck float loose.
The problem is with something that measures or shows the fuel level, and it could be as simple as an unplugged connector. Troubleshoot this circuit before you start diving down rabbit hole because that seems easier.
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Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
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35Chief wrote:
I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
Well, the largest drawback is that it is extremely unlikely that disconnecting the evap system will fix your fuel gauge. The other drawback is that you will have disabled the bike's ability to avoid venting significant amounts of fuel vapor into the air. Because of the low position of the fuel tank in the BV350, the fuel evap system on this model tends to be quite reliable. I'm guessing you are chasing the wrong horse.
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BV 350
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Hi All, Thank you for the most recent ideas, please keep them coming. I think I will hold off on removing the evac. canister. I did remove the fuel cap and started the bike no change on the fuel gauge. I am going to try the bounce it a couple times technique tomorrow.
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Location: Belgium
 
Molto Verboso
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Piaggio Beverly 300 ie - 2012
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UTC quote
35Chief wrote:
Hi All, Thank you for the most recent ideas, please keep them coming. I think I will hold off on removing the evac. canister. I did remove the fuel cap and started the bike no change on the fuel gauge. I am going to try the bounce it a couple times technique tomorrow.
Bouncing it may loosen the float. But do not expect too much of it. Just by riding the scooter it gets enough bounces I expect too loosen it, unless you always drive on perfectly smoothless roads.

Also the unplugged connector you can forget. That connector will not suddenly unplug while you are filling up.
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BV 350
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BV 350
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Hi, I tried bouncing the bike off a curb a few times today with no luck. I will run down the fuel tank a bit more tomorrow and try some more bouncing.
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Location: Belgium
 
Molto Verboso
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UTC quote
35Chief wrote:
Hi, I tried bouncing the bike off a curb a few times today with no luck. I will run down the fuel tank a bit more tomorrow and try some more bouncing.
Wish you good luck.
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BV 350
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Hi, Bounced some more today, no change. Fuel gauge light still blinks and fuel needle reads empty even though there is plenty of gas in the tank. More thoughts are welcome.
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Ossessionato
Red Devil SH150i (10,000)
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@breaknwind avatar
Red Devil SH150i (10,000)
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Sorry I won't do the research for you. Go to the online service manual. Look up how to check the fuel sender. It will probably require a OHM meter. A winking light points me to an electrical problem, not a stuck float. That is if I understand your post, that the fuel light is not on continuously but blinking.
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BV 350
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Hi, Yes, the yellow fuel light just blinks . I think I may just monitor gas consumption using the trip meter and get some tape and cover the blinking light and be done with it. I am used to working on motorcycles where things are much more open and accessible. I wish they had designed the removal of the body parts a lot more user friendly on the BV 350.
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Red Devil SH150i (10,000)
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Red Devil SH150i (10,000)
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UTC quote
The body parts on the BV are soooo much easier than the body parts on my Honda SH's. The body parts on an Xmax are a nightmare.
I always remove the footrest panels first. It makes removing the other panels easier, even if you don't have to remove the footrest panel.
The only panels that suck on the BV are the headset.
Take your time, put the screws in a bag and wire tie them to the panel and you won't lose the screws.
The only thing to fear about the panels is fear itself. Razz emoticon
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BV 350
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BV 350
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Hi, Bw. I wish you lived a bit closer.
@petercc avatar
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Posts: 1231
Location: Belgium
 
Molto Verboso
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Piaggio Beverly 300 ie - 2012
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Posts: 1231
Location: Belgium
UTC quote
35Chief wrote:
Hi, Yes, the yellow fuel light just blinks . I think I may just monitor gas consumption using the trip meter and get some tape and cover the blinking light and be done with it. I am used to working on motorcycles where things are much more open and accessible. I wish they had designed the removal of the body parts a lot more user friendly on the BV 350.
It blinks? You did not mention that before, or I did overlook it.
When fuel is low the fuel light lights up and stays on, it does not blink. At least not in my BV 300.

I am afraid if you want the problem solved you will have to replace the float-sender unit, this thing: https://www.easyparts.be/Benzinetankzender_(Originele-onderdelen)-p33527724
And you will have to dig in the body parts.

Never done that myself but according to breaknwind it should not be too difficult.
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BV 350
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Location: Ct.
 
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BV 350
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UTC quote
Hi Peter and all, that does seem to be the likely problem - the float sending unit. Thank you for tracing down the part. I will have to think it over on whether I want to tackle the job myself, have a mechanic do it or just leave it alone and like you said in an earlier reply just keep track of fuel consumption using the trip meter.
@breaknwind avatar
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Ossessionato
Red Devil SH150i (10,000)
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Location: Orange Park Florida
 
Ossessionato
@breaknwind avatar
Red Devil SH150i (10,000)
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Location: Orange Park Florida
UTC quote
Could be something as simple as a sloppy connection in the plug. I made a half assed Utube video B4 Scooter West did.

If you remove the right foot rest panel and the seat. You should be able to remove the right gas tank hump panel to gain access to the fuel tank. That's the silver panel that goes up the side of the glove box.
Replacing the seat is easier if you have someone to put the nuts on while you hold it. The hardest part of the foot rest panel is the rubber mat. After you make sure the plug retainer is in the hole and isn't folded over, you have to tuck each tab into the slot. Start from one end(front or back) and work your way across, one at a time. I think there's 4 of them.
I must have removed the panels of my 2014 8-10 times and my 2015 6-8 times. I painted one bike dark cherry and the other Hi-viz green.
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Member
BV 350
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BV 350
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UTC quote
Hi, In comparing both videos that were provided in earlier posts regarding removing the body panels would I have to remove the seat. It looks like when I remove the lower side panel on both sides above the rubber foot rest that I would have access to the 4 screws that cover the gas tank fuel cover. In removing that cover would that give me access to the float sending unit ?
@breaknwind avatar
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Ossessionato
Red Devil SH150i (10,000)
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Location: Orange Park Florida
 
Ossessionato
@breaknwind avatar
Red Devil SH150i (10,000)
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Location: Orange Park Florida
UTC quote
I don't remember that one. I do remember that if you try to force your way into a shortcut, you'll regret it. I only broke one plastic tab in all the times I've done it.
@breaknwind avatar
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Ossessionato
Red Devil SH150i (10,000)
Joined: UTC
Posts: 3252
Location: Orange Park Florida
 
Ossessionato
@breaknwind avatar
Red Devil SH150i (10,000)
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UTC quote
In my Honda service manual, it has a panel flow chart. Look up a panel and it tells you what panels you have to remove to get to it.
Sorry, I'm not going to look that up for you.
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